Tag Archives: Endodontidae

Libera tumuloides (Garrett)

Rarotongan Libera Snail (Libera tumuloides)

The Rarotongan Libera Snail was described in 1872; it was restricted to the island of Rarotonga, Cook Islands.

The species was apparently very common when it was first collected.:

I took over three hundred examples of this species, all obtained in a small area of about one-half an acre, and nearly two miles inland, at Rarotonga. Through carefully searched for, I failed to discover a single example in any other part of the island.” [1]

The shells reach sizes of 0.62 to 0.72 cm in diameter; they are light yellow horn-colored, with broad, irregular, light- to dark-toned reddish flammulations; the umbilicus was strongly constricted to form a brood chamber.

The species disappeared shortly after its description.

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second series: Pulmonata. Vol 3: Helicidae – Volume I. 1887’

(public domain)

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References:

[1] Andrew Garrett: The terrestrial Mollusca inhabiting the Cook’s or Harvey Islands. Journal of the Academy of Natural Sciences of Philadelphia. Ser. 2. Vol. 8(4): 381-412. 1881
[2] George W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second series: Pulmonata. Vol 3: Helicidae – Volume I. 1887
[3] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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edited: 17.02.2024

Pseudolibera solemi Sartori, Gargominy & Fontaine

Solem’s Pseudolibera Snail (Pseudolibera solemi)

Solem’s Pseudolibera Snail was described in 2014 based on subfossil shells, it was endemic to the raised coral island Makatea in French Polynesia.

The shells reach sizes of less than 0,8 cm in diameter, they are depressed to subdepressed, dome-shaped to trigonal, they are white with regularly spaced and bear amber-colored flammulations on the periphery. [1]

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References:

[1] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

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edited: 13.06.2020

Endodonta sp. ‘Barbers Point’

Kalaeloa Endodonta Snail (Endodonta sp.)

The Kalaeloa Endodonta Snail is an undescribed species that is known exclusively from subfossil specimens that had been recovered from coastal deposits at Kalaeloa (Barber’s Point) on the island of O’ahu, Hawaiian Islands. [1]

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References:

[1] Patrick V. Kirch; Carl C. Christensen: Nonemarine molluscs and paleoecology at Barber’s Point, O’ahu. Prepared for Archaeological Research Center Hawaii, Inc.. Department of Anthropology; Bernice P. Bishop Museum 1-40. 1980

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edited: 22.04.2019

Australdonta tubuaiana Solem

Tubuai Australdonta Snail (Australdonta tubuaiana)

The Tubuai Australdonta Snail was described in 1976; it is known only from subfossil specimens that were found in the western parts of Tubuai, Austral Islands.

The shells reach sizes of 0.42 to 0.5 cm; they are light yellowish white with broad reddish flammulations that fade out on the shell’s base.

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014

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edited: 18.02.2024

Pseudolibera aubertdelaruei Sartori, Gargominy & Fontaine

Aubert de la Rüe’ Pseudolibera Snail (Pseudolibera aubertdelaruei)

Aubert de la Rüe’ Pseudolibera Snail was described in 2014, it is known from only three specimens which were collected in 1955 by E. Aubert de la Rüe on the island of makatea in the Tuamotu Archipelago.

The shells reach sizes of less than 0,6 cm in diameter, they are white, depressed and decorated with flammulations, the apex is flat, the spire elevated, the peripheral keel is very short. [1]

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References:

[1] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

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edited: 13.06.2020

Pseudolibera matthieui Sartori, Gargominy & Fontaine

Matthieu’s Pseudolibera Snail (Pseudolibera matthieui)

Matthieu’s Pseudolibera Snail was described in 2014, it is known from at least 118 specimens that were collected on the island of Makatea in the Tuamotu Archipelago.


The shells reach sizes of less than 0,7 cm in diameter, they are white and show regularely spaced, amber-colored flammulations on the apical surface. 
[1]

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References:

[1] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

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edited: 13.06.2020

Hirasea katoi Habe

Kato’s Hirasea Snail (Hirasea katoi)

Kato’s Hirasea Snail was described in 1973 based on only two specimens that were collected from dune deposits of probable Pleistocene age on the island of Minamijima in the Ogasawara archipealgo, Japan.

The shells reached sizes of 0,3 cm in height, they were very flat, opercular in shape with an extremely depressed spire and a sharply marginated periphery. [1]

***

The species probably disappeared sometimes at the end of the Pleistocene or the beginning of the Holocene.

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References:

[1] Tadashige Habe: Fossil land snails from Minami-jima, Bonin Islands. Science Reports of the Tohoku University, Special Volume 6 (Hatai Memorial Volume): pages 51-53. 1973

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edited: 27.02.2024

Pseudohelenoconcha spurca (Sowerby)

Tainted Saint Helena Snail (Pseudohelenoconcha spurca)

The Tainted Saint Helena Snail was described in 1844 on the basis of subfossil, and apparently also quite recent shells that were collected at several localities at higher altitudes on the island of Saint Helena.

***

The species survived at least into the middle of the 19th century, since at least one the forms, (Pseudocampylaea dianae (Pfeiffer)), formerly described as distinct species and now assigned to this one, have been found alive. [1] 

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References:

[1] Edgar A. Smith: On the land-shells of St. Helena. Proceedings of the Zoological Society of London. 1892: 258-270

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Depiction from: ‘G. W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 8, Helicidae Vol. 6. 1892’

(public domain)

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edited: 29.05.2021

Mautodontha makateaensis Sartori, Gargominy & Fontaine

Makatea Mautodontha Snail (Mautodontha makateaensis)

This species was described in 2014, it is known from subfossil material that was found near the port of Temao on the island of Makatea in the Tuamotu Archipelago.

The shells are less than 0,4 cm in diameter; they are subdepressed, white and do not bear any markings.

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References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

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edited: 13.03.2021

Libera incognata Solem

Unknown Libera Snail (Libera incognata)

This species was described in 1976; it was restricted to the island of Tahiti in the Society Islands.

The shells reach sizes of 0.68 to 0.79 cm; they are yellowish white with numerous broad wine-red flammulations; the umbilicus is contracted and forms a brood chamber by a broad expansion of the entire last whorl. [1]

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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edited: 17.02.2024

Libera kondoi Christensen, Khan & Kirch

Kondo’s Libera Snail (Libera kondoi)

Kondo’s Libera Snail was described in 2018; it is known only from subfossil remains that were recovered from at least two areas on the island of Mo’orea in the Society Islands.

The shells are ‘extremely’ large for a member of its family, reaching a size of up to 0.97 cm in diameter.

Kondo’s Libera Snail is quite similar to Jacquinot’s Libera Snail (Libera jacquinoti (Pfeiffer)) in its large size, its overall shape and apertural barriers but can be distinguished from that species by having consistently much finer and more numerous riblets on the apical surface of the shell and by the absence of a strong basal sculpture. [1]

Like so many snail species endemic to Polynesia, also this one is now sadly extinct.

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References:

[1] C. C. Christensen; J. G. Kahn; P. V. Kirch: Nonmarine Mollusks from Archaeological Sites on Mo‘orea, Society Islands, French Polynesia, with Descriptions of Four New Species of Recently Extinct Land Snails (Gastropoda: Pulmonata: Endodontidae). Pacific Science 72(1): 95-123. 2018

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edited: 17.02.2024

Libera dubiosa Ancey

Dubious Libera Snail (Libera dubiosa)

The Dubious Libera Snail was described in 1889; it inhabited some of the valleys on the eastern- and northern sides of the island of Mo’orea in the Society Islands. 

The shells reach sizes of 0.48 to 0.58 cm. [1]

The species was apparently never recorded alive subsequently. [2]

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] C. C. Christensen; J. G. Kahn; P. V. Kirch: Nonmarine Mollusks from Archaeological Sites on Mo‘orea, Society Islands, French Polynesia, with Descriptions of Four New Species of Recently Extinct Land Snails (Gastropoda: Pulmonata: Endodontidae). Pacific Science 72(1): 95-123. 2018

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edited: 17.02.2024

Mautodontha spelunca Sartori, Gargominy & Fontaine

Cave Mautodontha Snail (Mautodontha spelunca)

This species was described in 2014 based on at least 405 subfossil shell specimens that were collected from a cave south of the village of Temao near the eastern coast of Makatea in the Tuamotu Archipelago.

The shells are less than 0,5 cm in diameter; they are depressed, white and do not bear any markings. [1]

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References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

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edited: 13.03.2021

Hirasea eutheca Hirase

Straight Hirasea Snail (Hirasea eutheca)

The Straight Hirasea Snail was described in 1907; it is, or maybe was, restricted to the island of Hahajima in the Ogasawara Islands, Japan.

The shells reach sizes of about 0,2 cm in height and about 0,3 cm in diameter; the spire is low-conic and the base very convex.

The species is now likely extinct. [1]

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References:

[1] Robert H. Cowie; Claire Régnier; Benoît Fontaine; Philippe Bouchet. Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41. 2017

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Depiction from: ‘The Conchological Magazine 1907’

(public domain)

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edited: 17.05.2022

Australdonta oheatora Sartori, Gargominy & Fontaine

Oheatora Australdonta Snail (Australdonta oheatora)

The Oheatora Australdonta Snail was described in 2013; it is known from about 35 specimens that were recovered from the island of Rurutu, Austral Islands.

The shells are small, thin, relatively high, subdepressed, opaque to pellucid, white to light fawn-colored and show no traces of markings. [1]

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Photo: André F. Sartori
https://creativecommons.org/licenses/by-nc/4.0/

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References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Anthropogenic extinction of Pacific and snails: A case study of Rurutu, French Polynesia, with description of eight new species of endodontids (Pulmonata). Zootaxa 3640(3): 343-372. 2013

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edited: 18.02.2024

Australdonta yoshii Solem

Yoshi’s Australdonta Snail (Australdonta yoshii)

Yoshi’s Australdonta Snail was described in 1976 on the basis of subfossil specimens that were found on the foot of the Matonaa plateau on the island of Rurutu, Austral Islands.

The shells reach sizes of 0.29 to 0.35 cm in diameter; they are light yellowish white with prominent somewhat irregular, zigzag-shaped, reddish flammulations, becoming narrower and more sharply angled on the shell’s base, merging near or in the umbilicus. [1]

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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edited: 18.02.2024

Mautodontha subtilis (Garrett)

Subtile Mautodontha Snail (Mautodontha subtilis)

This species was described in 1884; it is, or rather was, endemic to the island of Huahine in the Society archipelago.

The shells reach sizes of about 0,29 to 0,34 cm in diameter; they are light yellowish horn-colored with evenly spaced, wide, slightly zigzag-shaped, reddish flammulations which fade out on the base of the shell. [1]

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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Depiction from: ‘G. W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’   

(public domain)

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edited: 13.03.2021

Kleokyphus hypsus Solem

Aloft Kleokyphus Snail (Kleokyphus hypsus)

This species was described in 1976, originally on the basis of a single, quite worn specimen that was found in 1955 on the island of Makatea in the Tuamotu Archipelago.

The shells reach sizes of less than 0.7 cm in diameter; they are robust, opaque, subdepressed and white bearing regularly spaced, amber-colored flammulations which are usually stronger apically than on the body whorl, fading out on the shell’s base.

***

syn. Libera gregaria Garrett

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Photo: A. Sartori
http://www.mnhn.fr 
https://creativecommons.org/licenses/by-nc-nd/4.0/

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] André F Sartori; Olivier Gargominy; Benoît Fontaine: radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772: 1-68. 2014

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edited: 14.03.2024

Australdonta teaae Sartori, Gargominy & Fontaine

Tea’s Australdonta Snail (Australdonta teaae)

This species was described in 2013; it is known by 24 subfossil specimens that were collected on the island of Rurutu in the Austral archipelago.

The shells are very large, much wider than high, discoidal, white with reddish-brown flammulations on the apical surface, often faintly visible peripherally on the shell’s base through the subpellucid shell wall.

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Photo: O. Gargominy
https://creativecommons.org/licenses/by-nc/4.0/

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References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Anthropogenic extinction of Pacific and snails: A case study of Rurutu, French Polynesia, with description of eight new species of endodontids (Pulmonata). Zootaxa 3640(3): 343-372. 2013

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edited: 18.02.2024

Mautodontha saintjohni Solem

St. John’s Mautodontha Snail (Mautodontha saintjohni)

This species was described in 1976; it was endemic to the island of Bora Bora in the Society archipelago.

The shells reach about 0,26 to 0,3 cm in diameter; they are white and bear prominent zigzag-shaped, reddish flammulations. 

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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edited: 13.03.2021

Mautodontha temaoensis Sartori, Gargominy & Fontaine

Temao Mautodontha Snail (Mautodontha temaoensis)

The Temao Mautodontha Snail was described in 2014, it is known only from subfossil material that was found near the port of Temao on the island of Makatea in the Tuamotu Archipelago.

The shells are less than 0,3 cm in diameter; they are depressed, white and bear no markings at all. [1]

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References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

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edited: 13.03.2021

Australdonta rimatarana Solem

Rimatara Australdonta Snail (Australdonta rimatarana)

The Rimatara Australdonta Snail was described in 1976; it is known from about 12 specimens that were collected near Anapoto, a village in western Rurutu on the Austral Islands.

The shells reach sizes of 0.29 to 0.32 cm; they are light yellow horn-colored with rather broad, irregular, reddish flammulations that fade out on the shell’s base.

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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edited: 18.02.2024

Libera jacquinoti (Pfeiffer) 

Jacquinot’s Libera Snail (Libera jacquinoti)

Jacquinot’s Libera Snail was described in 1850; its actual place of origin was not known until 2018, when subfossil shells were recovered from archaeological sites on the island of Mo’orea, Society Islands.

The shells reach sizes of 0.75 to 0.92 cm, making it very large for a member of its family; they ae faint yellowish white, with irregular, zigzag, reddish flammulations above, absent from the base of the shells; the umbilicus is small and strongly constricted by the diagonal inward growth of the last whorls.

Jacquinot’s Libera Snail is now extinct.

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second series: Pulmonata. Vol 3: Helicidae – Volume I. 1887’

(public domain)

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] C. C. Christensen; J. G. Kahn; P. V. Kirch: Nonmarine Mollusks from Archaeological Sites on Mo‘orea, Society Islands, French Polynesia, with Descriptions of Four New Species of Recently Extinct Land Snails (Gastropoda: Pulmonata: Endodontidae). Pacific Science 72(1): 95-123. 2018

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edited: 17.02.2024

Kleokyphus cowiei Sartori, Gargominy & Fontaine

Cowie’s Kleokyphus Snail (Kleokyphus cowiei)

This species was described in 2014 on the basis of subfossil specimens that were recovered from a large, shaded fault in the limestone cliff at the eastern shore of Makatea, Tuamotu Archipelago.

The shells reach sizes of less than 0.5 cm in diameter; they are depressed, white to fawn-colored and usually worn and thus without markings, however, some specimens show traces of faint, regularly spaced, amber-colored flammulations; the umbilicus is U-shaped.

The species, like so many other Polynesian gastropods, is now extinct.

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References:

[1] André F Sartori; Olivier Gargominy; Benoît Fontaine: radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772: 1-68. 2014

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edited: 1403.2024

Hirasea insignis Pilsbry & Hirase

Remarkable Hirasea Snail (Hirasea insignis)

This species was described in 1904; it is, or maybe was, restricted to the island of Mukojima in the Ogasawara Islands, Japan.

This is a very small species; the shells reach sizes of about 0,2 cm in height and about 0,3 cm in diameter. “Shell imperforate, depressed, with low-conic spire and convex base, impressed in the center. Brown. Very finely and regularly striate radially above, smooth below. Whorls 5, convex, very slowly widening. Aperture crescentic, narrow, the lip strengthened by a strong white rib within, abruptly stopping short of the upper insertion. A long, erect callous lamina stands at the edge of the parietal callous.” [1]

The species might now be extinct. [2]

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References:

[1] Henry A. Pilsbry; Y. Hirase: Descriptions of new land snails of the Japanese Empire. Proceedings of the Academy of Natural Sciences of Philadelphia 56: 616-638. 1904
[2] Robert H. Cowie; Claire Régnier; Benoît Fontaine; Philippe Bouchet. Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41. 2017

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Depiction from: ‘The Conchological Magazine 1907’

(public domain)

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edited: 17.05.2022

Libera subcavernula (Tryon)

Cavity-bearing Libera Snail (Libera subcavernula)

The Cavity-bearing Libera Snail was described in 1887; it was restricted to the island of Rarotonga, Cook Islands.

Found plentifully in the mountain ravines, and is peculiar to Rarotonga.
It is closely related to the preceding species
 [Libera fratercula (Pease)], but may be distinguished by its darker color, smaller ribs, less prominent keel, and the shallow groove immediately above the revolving keel is not so conspicuous. In a careful comparison of numerous young examples of different ages I remark the umbilicus is considerably broader in cavernula than in fratercula” [1]

The shells reach sizes of 0.53 to 0.76 cm in diameter; they are yellowish horn-colored with numerous, somewhat irregular, reddish flammulations that fade out near the umbilicus.

The Cavity-bearing Libera Snail died out soon after its description.

***

syn. Libera cavernula (Garrett)

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second series: Pulmonata. Vol 3: Helicidae – Volume I. 1887’

(public domain)

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References:

[1] Andrew Garrett: The terrestrial Mollusca inhabiting the Cook’s or Harvey Islands. Journal of the Academy of Natural Sciences of Philadelphia. Ser. 2. Vol. 8(4): 381-412. 1881
[2] George W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second series: Pulmonata. Vol 3: Helicidae – Volume I. 1887
[3] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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edited: 17.02.2024

Australdonta sp. ‘Rimatara 3’

Undescribed Australdonta Snail (Australdonta sp.)

This form is known only on the basis of subfossil material that was found on the island of Rurutu, Austral Islands.

The taxon is apparently not identical with any of the already described taxa from the island but apparently the remains are too scanty for a proper description yet. [1]

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References:

[1] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014

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edited: 18.02.2024

Mautodontha passosi Sartori, Gargominy & Fontaine

Passos’ Mautodontha Snail (Mautodontha passosi)

This species was described in 2014, it is known from subfossil material that was found in rocky substrate at a cliff north of Moumu village on the eastern shore of the island of Makatea in the Tuamotu Archipelago.

The shells are less than 0,4 cm in diameter; they are subdepressed and white in color, they do not bear any markings. [1]

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References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

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edited: 13.03.2021

Mautodontha parvidens (Pease)

Small-toothed Mautodontha Snail (Mautodontha parvidens)

The Small-toothed Mautodontha Snail was described in 1861; this species is known to occur on at least three islands, Huahine, Mo’orea, and Tahiti in the Society Islands.

The shells reach sizes of about 0,28 to 0,39 cm in diameter; they are light yellowish white with broad, protractively sinuate, reddish flammulations which become faint or absent on the base of the shell. [1]

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

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Depiction from: ‘G. W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’   

(public domain)

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edited: 13.03.2021

Australdonta pharcata Solem

Taahuaia Australodonta Snail (Australdonta pharcata)

This species was described in 1976; it is known only from the type locality, which today is the village of Taahuaia on the island of Tubuai, Austral Islands.

The shells reach sizes of about 0.46 cm; the original color isn’t known, however, they still show traces of irregularly spaced, narrow to broad, reddish flammulations above the periphery.

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014

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edited: 18.02.2024

Pseudolibera cookei Sartori, Gargominy & Fontaine

Cooke’s Pseudolibera Snail (Pseudolibera cookei)

Cooke’s Pseudolibera Snail was described in 2014, it is known from nine specimens that were collected from a limestone cave at the western coast of the island of Makatea in the Tuamotu Archipelago.

The shells reach sizes of less than 0,7 cm, they are depressed, dome-shaped, white with a amber tint covering most of their surface but being absent from the vicinity of the umbilicus, their apex and spires are elevated, the peripheral keel is slightly angled towards the shell base. [1]

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References:

[1] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

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edited: 13.06.2020

Mautodontha occidentalis Sartoti, Gargominy & Fontaine

Western Mautodontha Snail (Mautodontha occidentalis 

This species was described in 2014.  

The species appears to be known from only 32 specimens, which were collected from the deposits inside a cave at the west coast of Makatea, Tuamotu Archipelago.  

The shells reach a size of less than 0,3 cm in diameter, they are subdepressed and bear no flammulations. [1]  

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References:  

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

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edited: 02.10.2017

Mautodontha domaneschii Sartoti, Gargominy & Fontaine

Domaneschi’s Mautodontha Snail (Mautodontha domaneschii 

Domaneschi’s Mautodontha Snail was described in 2014.  

The species is known from as much as 744 specimens, all collected in the northeastern part of Makatea, some from the deposits of the caves in the impressive cliffs.  

The shells reach a size of about 0,35 cm in diameter, they are discoidal and bear no signs of flammulations. [1]  

*********************  

References:  

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

*********************  

edited: 19.04.2018

Cookeconcha paucilamellata (Ancey)

Hamakua Cookeconcha Snail (Cookeconcha paucilamellata)  

The Hamakua Cookeconcha Snail was described in 1904, originally as a ‘variety’ of another species, the Mountain Cookeconcha Snail (Cookeconcha hystricella (Pfeiffer)) from the island of O’ahu, one of probably only three species of this genus still surviving.

However, this species originates from the biggest of the Hawaiian Islands, Hawai’i itself, were it apparently inhabited the forest floor of the rainforest at the slopes of Mauna Kea. [1]

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************

Depiction from: ‘C. F. Ancey: Report on semi-fossil land shells found in the Hamakua District, Hawaii. The Journal of Malacology 11: 65-74. 1904’

(public domain)

*********************

edited: 13.06.2020

Australdonta sp. ‘Rimatara 1’

Undescribed Australdonta Snail (Australdonta sp.)

This form is known only on the basis of subfossil material that was found on the island of Rurutu, Austral Islands.

The taxon is apparently not identical with any of the already described taxa from the island but apparently the remains are too scanty for a proper description yet. [1]

*********************

References:

[1] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014

*********************

edited: 18.02.2024

Mautodontha virginiae Sartori, Gargominy & Fontaine

Virginie’s Mautodontha Snail (Mautodontha virginae)

Virginie’s Mautodontha Snail was described in 2014; it is a now extinct species that was endemic to the island of Makatea in the Tuamotu Archipelago.

The shells of this species are less than 0,4 cm in diameter; they are depressed, white to fawn in color and bear irregularly spaced, amber-colored flammulations which persist on the shell base or are fading out in the vicinity of the umbilical margin.

*********************

References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

*********************

edited: 13.03.2021

Minidonta haplaenopla Solem

Simply-armed Minidonta Snail (Minidonta haplaenopla 

This species was described in 1976 from empty shells that were collected at the Matonaa Plateau on the island of Rurutu, Austral Islands.  

The shells are rather large for the genus, about 0,23 to 0,3 cm in diameter. [1]  

***

The species was not recorded during recent searches and is now best considered extinct. [2]  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014  

*********************  

edited: 04.10.2017

Australdonta radiella ssp. rurutuensis (Garrett)

Rurutuan Round Australdonta Snail (Australdonta radiella ssp. rurutuensis)

This somewhat enigmatic form was described in 1879, apparently based on a single specimen from the island of Rurutu that differs only slightly from the ‘normal’ Australdonta radiella (Pfeiffer) from the neighboring island of Tubuai. 

The only significant difference from Australdonta radiella radiella lies in having 17 distinguishable parietals. Shape and sculpture fall within the limits of variation observed for the nominate race. The diameter (3.52 mm.) is less than that of nearly all adult A. radiella radiella, but the shell is clearly subadult and this difference has no significance.” [1]

***

syn. Endodonta rurutuensis (Garrett), Helix rurutuensis (Garrett), Patula rurutuensis Garrett

*********************  

References: 

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************  

edited: 18.02.2024

Australdonta magnasulcata Solem

Large-furrowed Australdonta Snail (Australdonta magnasulcata)

The Large-furrowed Australdonta Snail was described in 1976; it is known from subfossil specimens that had been collected from the Matonaa plateau on the island of Rurutu, Australian Islands.

The shells reach sizes of about 0.37 cm in diameter; they are light yellow horn-colored with faint, irregular, rather widely spaced, reddish flammulations that fade out on the shell’s base.

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

edited: 18.02.2024

Mautodontha unilamellata (Garrett)

Rarotongan Mautodontha Snail (Mautodontha unilamellata)

This species was described in 1874; it was restricted to the island of Rarotonga, Cook Islands. 

The shells reach sizes of 0,36 to about 0,43 cm in diameter; they are light yellowish horn-colored with numerous, crowded zigzag-shaped, reddish flammulations. [1] 

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

edited: 13.03.2021

Pseudolibera parva Sartori, Gargominy & Fontaine

Small Pseudolibera Snail (Pseudolibera parva)

The Small Pseudolibera Snail was described in 2014, it is known from 44 specimens that were collected from the base of a limestone cliff on the island of Makatea in the Tuamotu Archipelago.

This is the smallest of the species within its genus, the shells reach sizes of less than 0,5 cm, they are depressed, white and are decorated with regularely spaced amber- to maroon-colored flammulations that quickly fade out on the shell base, the first two to three whorls, in addition to the flammulations, often show a fawn background coloration. [1]

*********************

References:

[1] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

*********************

edited: 13.06.2020

Hirasea profundispira Pilsbry

Deep-coiled Hirasea Snail (Hirasea profundispira)  

The strange-looking Deep-coiled Hirasea Snail was described in 1902.  

The species comes from the island of Chichijima in the Ogasawara island group, Japan and is considered most likely extinct.  

*********************

Depiction from: ‚Henry August Pilsbry: Papers on Mollusca of Japan. Philadelphia 1901-12 ‘  

(not in copyright)  

*********************

edited: 20.03.2018

Australdonta degagei (Garrett)

De Gage’s Australdonta Snail (Australdonta degagei)

De Gage’s Australdonta Snail was described in 1879; it is allegedly known from specimens collected in Ma’uke, Cook Islands as well as from Rimatara and Rurutu, Austral Islands, which is very strange.

The shells reach sizes of about 0.28 to 0.35 cm in diameter; they are light yellow horn-colored with light somewhat irregular, reddish flammulations.

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

edited: 18.02.2024

Aaadonta pelewana Solem

Palau Aaadonta Disc Snail (Aaadonta pelewana 

The Palau Aaadonta Disc Snail was described in 1976 based on several (seven, as far as I’m aware) shells that had been found somewhere (the exact locality is not known) on the Palau Islands some 70 years ago (an exact date is not known to me).  

The shells of this tiny species reached a size of only about 0,28 cm in diameter. [1]  

***  

According to David Bullis (pers. comm.), who studies this genus in Palau, this species has indeed never been found since the type collection and may indeed be extinct, in my opinion it should best be referred to as ‘Data Deficient’.  

*********************  

References:  

[1] A. Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************  

edited: 10.05.2019

Cookeconcha luctifera (Pilsbry & Vanatta)

Mourning Cookeconcha Snail (Cookeconcha luctifera 

This species was described in 1905, it was endemic to the island of Moloka’i, Hawaiian Islands.

The shells reached sizes of about 0,39 to 0,52 cm, they had a light yellow ground color and were decorated with brown flammulations. [1]

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************

Depiction from: ‘H. A. Pilsbry; E. G. Vanatta: Notes on some Hawaiian Achatinellidae and Endodontidae. Proceedings of the Academy of Natural Sciences in Philadelphia 57: 570-575. 1905’

(not in copyright)

*********************

edited: 13.06.2020

Australdonta tapina Solem

(Australdonta tapina)

This species was described in 1976 on the basis of subfossil specimens found on a Makatea cliff in the lowlands of western Rurutu, Austral Islands.

The shells reach sizes of about 0.31 to 0.38 cm in diameter; the are light yellowish white with widely spaced, irregularly shaped, reddish markings that fade out below the periphery.

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

edited: 18.2.2024

Mautodontha aurora Sartori, Gargominy & Fontaine

Aurora Mautodontha Snail (Mautodontha aurora)

This species was described in 2014, it is known from subfossil material that was found on top of a cliff on the island of Makatea in the Tuamotu Archipelago.

The shells are less than 0,35 cm in diameter; they are depressed white to fawn in color and do not bear any markings. [1]

*********************

References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

*********************

edited: 13.03.2021

Mautodontha punctiperforata (Garrett)

Perforated Mautodontha Snail (Mautodontha punctiperforata)

This species was described in 1884; it is, or rather was, endemic to the island of Mo’orea in the Society archipelago.

The shells reach sizes of 0,3 to about 0,36 cm in diameter; they are light yellowish horn-colored with prominent, reddish flammulations which are broader above and are becoming narrower on the body whorl, fading out on the base of the shell. [2]

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

Depiction from: ‘G. W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’   

(public domain)

*********************

edited: 13.03.2021

Australdonta florencei Sartori, Gargominy & Fontaine

Florence’s Australdonta Snail (Australdonta florencei)

Florence’s Australdonta Snail was described in 2013; it is known by the astonishing number of 1732 subfossil specimens all of which were collected on the island of Rurutu, Austral Islands.

The shells are depressed, white to light fawn-colored, usually without markings but some specimens bear narrow, oblique or curved flammulations fading out towards the shell’s base.

*********************

Photo: O. Gargominy
http://www.mnhn.fr
https://creativecommons.org/licenses/by-nc-nd/4.0/

*********************

References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Anthropogenic extinction of Pacific and snails: A case study of Rurutu, French Polynesia, with description of eight new species of endodontids (Pulmonata). Zootaxa 3640(3): 343-372. 2013

*********************

edited: 18.02.2024

Hirasea minamijimana Habe

Minamijima Hirasea Snail (Hirasea minamijimana) 

The Minamijima Hirasea Snail was described in 1973 based on five specimens that were collected from probable Pleistocene deposits on the island of Minamijima, Ogasawara Islands, Japan. 

The shells reached sizes of about 0,56 to 0,64 cm in height; they were ashy white and their surface was ribbed by distantly placed rough growth lines. [1]

***

I do not know for sure when this species actually disappeared, but I assume it to be a Pleistocene/Holocene border extinction.

*********************

References:

[1] Tadashige Habe: Fossil land snails from Minami-jima, Bonin Islands. Science Reports of the Tohoku University, Special Volume 6 (Hatai Memorial Volume): 51-53. 1973

*********************

edited: 11.05.2019

Endodonta lamellosa (Férussac)

Lamellar Disc Snail (Endodonta lamellosa)

The Lamellar Disc Snail was described in 1822, originally as coming from “Islands of the South Sea“, it was, however, endemic to Mt. Konahuanui, the highest peak of the Ko’olau Mountains on the island of O’ahu, Hawaiian Islands. 

***

The Lamellar Disc Snail is now, like most of its congeners, extinct. [2]

*********************

References:

[1] Henry A. Pilsbry; C. Montangue Cooke Jr.; Marie C. Neal: Land Snails from Hawaii, Christmas Island, and Samoa. Bishop Museum Bulletin 47: 1-49. 1928
[2] Norine W. Yeung; Kenneth A. Hayes: Biodiversity and extinction of Hawaiian land snails: how many are left now and what must we do to conserve them – a reply to. Integrative and Comparative Biology 58(6): 1157-1169. 2018

*********************

Depiction from: ‘H. A. Pilsbry; E. G. Vanatta: Hawaiian species of Endodonta and Opeas. Proceedings of the Academy of Natural Sciences of Philadelphia 57: 783-786. 1905’  

(not in copyright)

*********************

edited: 06.09.2019

Kleokyphus callimus Solem

Small Kleokyphus Snail (Kleokyphus callimus)

The Small Kleokyphus Snail was described in 1976 on the basis of four specimens that were collected in 1955 on the island of Makatea in the Tuamotu Archipelago.

The shells are less than 0.5 cm in diameter; they are depressed, thin, opaque and white, decorated with regularly spaced, amber-colored flammulations that fade out towards the shell’s base.

***

syn. Libera heynemanni (Pfeiffer)

*********************

Photo: A. Sartori
http://www.mnhn.fr 
https://creativecommons.org/licenses/by-nc-nd/4.0/

*********************  

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] André F Sartori; Olivier Gargominy; Benoît Fontaine: radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772: 1-68. 2014

*********************  

edited: 14.03.2024

Minidonta taunensis Solem & Cooke

Tauna Disc Snail (Minidonta taunensis)  

This species was described in the year 1976 on the basis of two specimens, which had been found in the year 1934 on the small coral islet Tauna in the Gambier Archipelago, sitting on dead leaves.  

The shells reach an average size of 0,22 cm in diameter.  

***

The Tauna Disc Snail was for a long time known only from the typus material, but then, in the year 1997, shells of this species were also found on the islands of Akamaru and Kouaku.  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Ahmed Abdou; Philippe Bouchet: Nouveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints da l’archipel des Gambier (Polynésie). Zoosystema 22(4): 689-707. 2000  

*********************  

edited: 23.09.2017

Pseudolibera eliporoii Sartori, Gargominy & Fontaine

Elie Poroi’s Pseudolibera Snail  (Pseudolibera eliporoii)

Elie Poroi’s Pseudolibera Snail was described in 2014, it was endemic to the island of Makatea, Tuamotu Archipelago in French Polynesia; it is known from at least 93 specimens, most of which were collected from the deposits inside the Moumu cave.

The shells reach a size of less than 0,7 cm, they are subdepressed, dome-shaped, white and bear regularely spaced amber-colored flammulations which are often more conspicuous on the shell base than apically. [1]

*********************

References:

[1] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

*********************

edited: 13.06.2020

Gambiodonta grandis Cooke & Solem

Large Gambiodonta Snail (Gambiodonta grandis)

The Large Gambiodonta Snail was described in 1976 (together with all other members of its genus), it is known from 259 specimens collected in 1934, 32 from the islet of Agakauitai and 227 from Aukena Islet, Gambier Islands.

The Large Gambiodonta Snail was the largest member of its genus known so far, the shell of the holotype reached 0,85 cm in heigth and 1,18 cm in diameter. [1]

***

The whole genus apparently disappeared shortly after the arrival of the first Polynesians on the Gambier Islands. 

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

edited: 19.04.2019

Mautodontha harperae Sartori, Gargominy & Fontaine

Harper’s Mautodontha Snail (Mautodontha harperae)

This species was described in 2014 based on subfossil shells that had been obtained from deposits inside the Moumu Cave on the island of Makatea in the Tuamotu Archipelago.

The shells are less than 0,4 cm in diameter; they are depressed, white and don’t bear any flammulations.

*********************

References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3771(1): 1-68. 2014  

*********************

edited: 13.03.2021

Mautodontha maupiensis (Garrett)

Maupiti Mautodontha Snail (Mautodontha maupiensis)

This species from the island of Maupiti was described in the year 1884. 

The shells reach an average size of 0,3 cm in diameter; they are light yellowish horn-colored with vague, somewhat regularly spaced, reddish flammulations. [2] 

***

Andrew J. Garrett, the species’ author, writes in the year 1884.: 

Very common, and confined to the small island of Maupiti.” [1]

Thus, the Maupiti Disc Snail, of which today 21 museum specimens are still in existence, must still have been very common in the 19th century, but died out shortly after.

********************* 

References: 

[1] Andrew J. Garrett: The terrestrial Mollusca inhabiting the Society Islands”. Journal of the Academy of Natural Sciences of Philadelphia. 2nd series 9: 17-114. 1884 
[2] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 

*********************

Depiction from: ‘G. W. Tryon; H. A. Pilsbry; u.a.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’ 

(public domain)

*********************

edited: 10.06.2012

Minidonta simulata Solem & Cooke

Gambier Islands Minidonta Snail (Minidonta simulata 

This species was described in 1976.  

The species was originally known from specimens that had been collected on the islands of Agakuitai, Aukena and Mangareva, Gambier Islands, but was subsequently found on Akamaru and Taravai too. [1][2]  

The shells are quite large for the genus, reaching about 0,24 to 0,29 cm in diameter. [1]  

*********************  

References  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014  

*********************  

edited: 05.10.2017

Graeffedon graeffei (Mousson)

Graeffe’s Graeffedon Snail (Graeffedon graeffei)  

This species from the Samoan island of ‘Upolu, which is known only from a handful specimens, was described in the year 1869.  

The shells reach an average size of 0,46 to 0,59 cm in diameter.  

Graeffe’s Graeffedon Snail inhabited the leaf litter of the rainforests, where it easily felt victim to introduced rats, and more so to the likewise introduced Yellow Crazy Ants (Anoplolepis gracilipes F. Smith).  

The last specimen was collected in the year 1965.  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part II, Families Punctidae and Charopidae, Zoogeography. Field Museum of Natural History Chicago, Illinois 1983 
[2] Robert H. Cowie; A. C. Robinson: The decline of native Pacific island faunas: changes in status of the land snails of Samoa through the 20th century. Biological Conservation 110: 55-65. 2003  

*********************

Depiction from: ‘G. W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’ 

(public domain)

*********************

edited: 02.11.2020

Gambiodonta mangarevana Solem & Cooke

Mangarevan Gambiodonta Snail (Gambiodonta mangarevana)

The Mangarevan Gambiodonta Snail was described in 1976 based on only six specimens, two adults and four juveniles, that had been collected in 1934 on the island of Mangareva, Gambier Islands.

The species is quite similar to the Domed Gambiodonta Snail (Gambiodonta tumida Cooke & Solem) but smaller, its shells reached average sizes of about 0,45 cm in diameter. [1]

***

The species occurred also on the small island of Taravai, next to Mangareva Island, where its subfossil shells were discovered during field searches in 1997. [2]  

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] Ahmed Abdou; Philippe Bouchet: Noveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints de l’archipel des Gambier (Polynésie). Zoosystea 22(4): 689-707. 2000

*********************

edited: 19.04.2019

Pseudolibera extincta Sartori, Gargominy & Fontaine

Extinct Pseudolibera Snail (Pseudolibera extincta)

This species was described in 2014, it is known from at least 30 specimens that were collected from below rocks on the island of Makatea in the Tuamotu Archipelago.

The shells are less than 0,7 cm in diameter, they are depressed, dome-shaped, white and are decorated with regularely spaced amber-colored flammulations on the apical surface but absent from the shell base. [1]

*********************

References:

[1] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

*********************

edited: 13.06.2020

Minidonta sulcata Solem

Sulcate Minidonta Snail (Minidonta sulcata)  

This species was described in 1976, it is apparently known from only four specimens, that were collected from the same locality on the island of Raiavavae, Austral Islands, that also harbored the shells of the Anatonu Minidonta Snail (Minidonta anatonuana Solem), the Micro-coned Minidonta Snail (Minidonta micraconica Solem), and the Planulate Minidonta Snail (Minidonta planulata Solem).  

The shells reach sizes of about 0,2 to 0,23 cm in diameter. [1]  

***

The species wasn’t found during recent searches and is now considered extinct. [2]  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014  

*********************  

edited: 04.10.2017

Australdonta pseudplanulata Solem

Plane Australdonta Snail (Australdonta pseudplanulata)

The Plane Australdonta Snail was described in 1976; it was named after its similarity to the Plane Minidonta Snail (Minidonta planulata Solem) with which it shared its habitat.

This is the smallest species within its genus; the shells reach sizes of 0.5 to 0.28 cm; they are light yellowish horn-colored without any darker markings. [1]

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

edited: 18.02.2024

Cookeconcha lanaiensis (Sykes)

Lanai Cookeconcha Snail (Cookeconcha lanaiensis)  

The Lanai Cookeconcha Snail was, as its name implies, endemic to the island of Lana’i, Hawaiian Islands, it was described in 1896. [1]

This species is also considered to have occurred on the islands of Hawai’i and Kaua’i (the specimen depicted below is supposed to be from that island), however, the specimens from these islands should definetely be reinvestigated.

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************

Depiction from ‘Fauna Hawaiiensis; being the land-fauna of the Hawaiian Islands. by various authors, 1899-1913. Cambridge [Eng.]: The University Press, 1913’  

(public domain)

********************* 

edited: 13.06.2020

Australdonta pakalolo Sartori, Gargominy & Fontaine

Pakalolo Australdonta Snail (Australdonta pakalolo)

This species was described in 2013; it is known from only two subfossil specimens that were found on the island of Rurutu in the Austral archipelago.

The shells are depressed to subdepressed, light fawn-colored, without markings.

*********************

References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Anthropogenic extinction of Pacific and snails: A case study of Rurutu, French Polynesia, with description of eight new species of endodontids (Pulmonata). Zootaxa 3640(3): 343-372. 2013

*********************

edited: 18.02.2024

Minidonta extraria Cooke & Solem

Strange Minidonta Snail (Minidonta extraria)  

This species was described in 1976 based on three specimens, each found on another island of the Gambier group respectively.  

The shells reached sizes of about 0,27 to 0,3 cm in diameter.  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Ahmed Abdou; Philippe Bouchet: Nouveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints da l’archipel des Gambier (Polynésie). Zoosystema 22(4): 689-707. 2000  

*********************  

edited: 05.10.2017

Endodonta kamehameha Pilsbry & Vanatta

Kamehameha Disc Snail (Endodonta kamehameha)  

The Kamehameha Disc Snail was restricted to the Wailau Pali Valley, Mapulehu at the southern coast of eastern Moloka’i, Hawaiian Islands.  

The shells reached of this very large species a size of up to 0,73 cm in diameter. [1][2]  

***

The Kamehameha Disc Snail is now most certainly extinct. [3]  

*********************  

References:  

[1] H. A. Pilsbry; E. G. Vanatta: Hawaiian species of Endodonta and Opeas.  Proceedings of the Academy of Natural Sciences of Philadelphia 57: 783-786. 1905 
[2] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[3] Norine W. Yeung; Kenneth A. Hayes: Update on the status of the remaining Hawaiian land snail species Part 4: Punctidae and Endodontidae. 2016  

*********************

Depiction from: ‘H. A. Pilsbry; E. G. Vanatta: Hawaiian species of Endodonta and Opeas. Proceedings of the Academy of Natural Sciences of Philadelphia 57: 783-786. 1905’

(not in copyright)

*********************  

edited: 05.04.2018

Mautodontha consobrina (Garrett)

Huahine Mautodontha Snail (Mautodontha consobrina)

The Huahine Mautodontha Snail was described in 1884; it was restricted to the island of Huahine, Society Islands.

The shells reach an average size of 0,38 cm in diameter, the largest are up to 0,43 cm in diameter; they are light yellowish horn-colored with broad, frequently spaced zigzag-shaped, reddish flammulations. [2] 

Andrew J. Garrett, the species’ author writes in the year 1884.: 

Rare and peculiar to one valley.” [1]

This statement is all, that is known about this now extinct species, of which obviously only seven museum specimens are in existence. 

********************* 

References: 

[1] Andrew J. Garrett: The terrestrial Mollusca inhabiting the Society Islands”. Journal of the Academy of Natural Sciences of Philadelphia. 2nd series 9: 17-114. 1884 
[2] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 

*********************

Depiction from: ‘G. W. Tryon; H. A. Pilsbry; u.a.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’ 

(public domain)

*********************

edited: 13.03.2021

Hirasea planulata Pilsbry & Hirase

Planulate Hirasea Snail (Hirasea planulata) 

The Planulate Hirasea Snail was described in 1903, it is or was endemic to the island of Hahajima in the Ogasawara Islands of Japan.

The shells reach sizes of about 0,18 cm in heigth and about 0,32 cm in diameter, they are yellowish brown, dull and very densely, very finely radially striatea above, becoming smooth and glossy beneath. [1]

*********************

References:

[1] H. A. Pilsbry; Y. Hirase: Notices of new Japanese land shells. The Nautilus 17(4): 44-46. 1903

*********************

Depiction from: ‘The Conchological Magazine 1907’

(public domain)

*********************

edited: 11.05.2019

Pseudolibera lillianae Cooke & Solem

Liliana’s Pseudolibera Snail (Pseudolibera lillianae)

Liliana’s Pseudolibera Snail was described in 1976 based on only two specimens, the considerably worn holotype and another, very small juvenile specimen, apparently both collected in 1958 on the island of Makatea in the Tuamotu Archipelago. [1][2]

***

The species is now, however, known from at least 1140 specimens, most of which were collected during intensive field studies on the island of Makatea in 2005. 

The shells are less than 0,9 cm in diameter, they are depressed dome-shaped, white with regularey spaced amber-colored flammulations, frequently interrupted at the shell periphery and vicinity of the umbilicus. [2]

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] A. F. Sartori; O. Gargominy; B. Fontaine: Radiation and decline of endodontid land snails in Makatea, French Polynesia. Zootaxa 3772(1): 1–68. 2014

*********************

edited: 19.04.2019

Gambiodonta mirabilis Cooke & Solem

Miraculous Gambiodonta Snail (Gambiodonta mirabilis)

The Miraculous Gambiodonta Snail was described in 1976 based on 39 specimens that had been collected in 1934, 4 on the islet of Aukena and 35 on Mangareva Island, Gambier Islands.

The shells reached average sizes of 0,5 to 0,58 cm in diameter. [1]

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

edited: 19.04.2019

Mautodontha zebrina (Garrett)

Striped Mautodontha Snail (Mautodontha zebrina)

The Striped Mautodontha Snail was described in 1874, it is known only from six specimens that were collected in an (unnamed?) valley on the island of Rarotonga, Cook Islands.

The shells reach sizes of 0,37 to 0,46 cm in diameter; they are very light yellowish horn-colored with irregularly spaced, reddish flammulations that fade out towards the umbilicus. [1]

***

The Striped Mauthodonta Snail is now extinct.

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976

*********************

Depiction from: ‘G. W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’   

(public domain)

*********************

edited: 13.03.2021

Cookeconcha paucicostata (Pease)

Small-ribbed Cookeconcha Snail (Cookeconcha paucicostata)  

The Small-ribbed Cookeconcha Snail was described in 1870, it is known fom a single specimen that originally was labelled as originating from the Marquesas.

The shell has a size of about 0,3 cm in diameter. [1]

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************  

edited: 13.06.2020

Minidonta flammulina Abdou & Bouchet

Flammulated Minidonta Snail (Minidonta flammulina 

This species was described in 2000 based on subfossil specimens that were collected near Gahutu Tenohu at the north coast of Mangareva, Gambier Islands, at a site covered with introduced wees and Coconut palms (Cocos nucifera L.).  

The shells reach an average size of about 0,29 cm in diameter, they are covered with regularly spaced rusty-colored markings. [1]  

*********************  

References:  

[1] Ahmed Abdou; Philippe Bouchet: Nouveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints da l’archipel des Gambier (Polynésie). Zoosystema 22(4): 689-707. 2000  

*********************  

edited: 05.10.2017

Endodonta fricki (Pfeiffer)

Frick’s Disc Snail (Endodonta fricki)

Frick’s Disc Snail was described in 1858, it was apparently distributed over the whole Wai’anae Mountains on the island of O’ahu, Hawaiian Islands, some of the specimens included in here, however, are probably geographical subspecies or even distinct species. 

The shells of this species reached sizes of about 0,26 to 0,38 cm in heigth. [1]

***

Frick’s Disc Snail is now, like most of its congeners, extinct. [2]

*********************

References:

[1] Henry A. Pilsbry; C. Montangue Cooke Jr.; Marie C. Neal: Land Snails from Hawaii, Christmas Island, and Samoa. Bishop Museum Bulletin 47: 1-49. 1928
[2] Norine W. Yeung; Kenneth A. Hayes: Biodiversity and extinction of Hawaiian land snails: how many are left now and what must we do to conserve them – a reply to. Integrative and Comparative Biology 58(6): 1157-1169. 2018

*********************

Depiction from: ‘G. W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’

(public domain)

*********************

edited: 08.05.2019

Australdonta magnasulcatissima Zimmermann, Gargominy & Fontaine

Many-furrowed Australdonta Snail (Australdonta magnasulcatissima)

The Many-furrowed Australdonta Snail was described in 2009 on the basis of subfossil specimens; it is only known from Mato Toerau on the island of Rurutu, Austral Islands, where it was found together with the remains of at least one additional congeneric species.

The shells reach sizes of about 0.5 cm; they are rather worn and creamy white with tawny flammulations visible mainly on the shell’s upper part. [1]

*********************

Photo: O. Gargominy
http://www.mnhn.fr
https://creativecommons.org/licenses/by-nc-nd/4.0/

*********************

References:

[1] Gabrielle Zimmermann; Olivier Gargominy; Benoît Fontaine: Quatre espèces nouvelles d’Endodontidae (Mollusca, Pulmonata) éteints de Rurutu (Îles Australes, Polynésie française). Zoosystema 31(4):791-805. 2009

*********************

edited: 18.02.2024

Australdonta anneae Sartori, Gargominy & Fontaine

Anne’s Australdonta Snail (Australdonta anneae)

This species was described in 2013; it is known from three subfossil specimens that were found on the island of Rurutu, Austral Islands.

The shells are depressed, white to light fawn-colored and bear no visible markings.

*********************

Photo: O. Gargominy
http://www.mnhn.fr
https://creativecommons.org/licenses/by-nc-nd/4.0/

*********************

References:

[1] André F. Sartori; Olivier Gargominy; Benoît Fontaine: Anthropogenic extinction of Pacific and snails: A case study of Rurutu, French Polynesia, with description of eight new species of endodontids (Pulmonata). Zootaxa 3640(3): 343-372. 2013

*********************

edited: 18.02.2024

Cookeconcha thwingi (Ancey)

Thwing’s Cookeconcha Snail (Cookeconcha thwingi 

This species was described in 1904.  

Thwing’s Cookeconcha Snail inhabited an extinct crater at the Kona coast of Hawai’i, Hawaiian Islands.  

The shells reached a size of 0,21 to 0,25 cm in diameter. [1]  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************  

edited: 23.03.2018

Hirasea diplomphalus ssp. latispira Pilsbry

Wide-spired Hirasea Snail (Hirasea diplomphalus ssp. latispira

The Wide-spired Hirasea Snail was described in 1902, it is or was endemic to the islnd of Chichijima, Ogasawara Islands, Japan.

This form is similar to the nominate race but differs from it that the spire is wider and less sunken. [1]

*********************

References:

[1] Henry A. Pilsbry: New land mollusks of the Japanese Empire. The Nautilus 16(2): 45-47. 1902

*********************

Depiction from: ‘The Conchological Magazine 1907’

(public domain)

*********************

edited: 11.05.2019

Australdonta microspiralis Zimmermann, Gargominy & Fontaine

Micro-spiraled Austral Snail (Australdonta microspiralis)

The Micro-spiraled Austral Snail was described in 2009; it is only known from subfossil specimens that were recovered from a locality near the eastern coast of Rurutu, Austral Islands.

The shells reach sizes of about 0.34 cm in diameter; being subfossil they are very worn, creamy white and decorated with faded orange flammulations. [1]

*********************

Photo: O. Gargominy
http://www.mnhn.fr
https://creativecommons.org/licenses/by-nc-nd/4.0/

*********************  

References:  

[1] Gabrielle Zimmermann; Olivier Gargominy; Benoît Fontaine: Quatre espèces nouvelles d’Endodontidae (Mollusca, Pulmonata) éteints de Rurutu (Îles Australes, Polynésie française). Zoosystema 31(4): 791-805. 2009

*********************

edited: 18.02.2024

Cookeconcha elisae (Ancey)

Elisa’s Cookeconcha Snail (Cookeconcha elisae)  

This species was described in 1889, its exact origin is not known, but it certainly originates from one of the Hawaiian Islands. [1]  

The species is clearly extinct like almost all of its congeners.  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************  

edited: 16.10.2017

Cookeconcha contorta (Ferrussac)

Contorted Cookeconcha Snail (Cookeconcha contorta)  

This species was originally described in 1824, it is obviously known from only four specimens, it apparently inhabited some place in the Wai’anae Mountains on the island of O’ahu, Hawaiian Islands. [1]

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

*********************

Depiction from: ‘G. W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’

(public domain)

*********************

edited: 13.06.2020

Endodonta binaria (Pfeiffer)

Binary Disc Snail (Endodonta binaria)  

The Binary Disc Snail, which was described in 1856, was endemic to the island of Kaua’i, Hawaiian Islands.  The shells on average reached a size of 0,43 cm in diameter. [1]  

***

This species is now most likely extinct, like nearly all of its congeners. [2]  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Norine W. Yeung; Kenneth A. Hayes: Update on the status of the remaining Hawaiian land snail species Part 4: Punctidae and Endodontidae. 2016  

*********************   

Depiction from: ‘G. W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’

(not in copyright)  

*********************  

edited: 23.03.2017

Gambiodonta agakauitaiana Solem & Cooke

Agakauitai Gambiodonta Snail (Gambiodonta agakauitaiana)

This species was described in 1976 based on specimens that had been collected in 1934 on the small islet of Agakauitai which lies about 300 m south of Mangareva, Gambier Islands.

The shells reached sizes of 0,39 to 0,4 cm in dimater. [1]

***

The species was originally only known from the small islet of Agakauitai, but subfossil shells were discovered in 1997 on the islands of Mangareva and Taravai, the two largest of the Gambier Islands, as well. [2] 

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] Ahmed Abdou; Philippe Bouchet: Noveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints de l’archipel des Gambier (Polynésie). Zoosystea 22(4): 689-707. 2000

*********************

edited: 19.04.2019

Hirasea biconcava Pilsbry

Concave Hirasea Snail (Hirasea biconcava 

This species was described in 1907, it was restricted to the island of Hahajima in the Ogasawara Islands, Japan.  

The shells reach a height of about 0,2 cm and are about 0,4 cm in diameter.  

***

This species is also treated as subspecies of the Plane Hirasea Snail (Hirasea planulata Pilsbry & Hirase) . 

*********************

Depiction from: ‘The Conchological Magazine 1907’  

(public domain)

*********************

edited: 11.05.2019

Endodonta laminata (Pease)

Laminated Disc Snail (Endodonta laminata)  

This species was described in 1866, it was restricted to an area that reached from Kahiliwai to Haena on the northern coast of Kaua’i, Hawaiian Islands.  

The Laminated Disc Snail was a quite large species, its shells reached an average size of about 0,6 to 0,65 cm in diameter. [1]  

***

The species was not seen since the beginning of the 20th century and is very certainly extinct. [2]  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Norine W. Yeung; Kenneth A. Hayes: Update on the status of the remaining Hawaiian land snail species Part 4: Punctidae and Endodontidae. 2016  

*********************  

edited: 23.03.2017

Minidonta perminima Abdou & Bouchet

Small Minidonta Snail (Minidonta perminima 

This species was described in 2000 based on subfossil shells that were found at Gahutu Tenohu at the north coast of Mangareva, Gambier Islands, at a site covered with introduced herbs and Coconut palms (Cocos nucifera L.).  

The shells reach an average size of about 0,16 cm in diameter. [1]  

*********************  

References:  

[1] Ahmed Abdou; Philippe Bouchet: Nouveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints da l’archipel des Gambier (Polynésie). Zoosystema 22(4): 689-707. 2000  

*********************  

edited: 05.10.2017

Australdonta collicella Zimmermann, Gargominy & Fontaine

Small Rurutu Austral Snail (Australdonta collicella)

The Small Rurutu Austral Snail was described in 2009; it is only known from subfossil specimens that were recovered from a locality near the eastern coast of Rurutu, Austral Islands.

The shells reached sizes of about 0.58 cm in diameter; they are, of course, quite worn and are creamy white, decorated with fading orange flammulations. [1]

***

The island of Rurutu is now known to have once harbored at least 11 species of this genus, all of them are now extinct. [2] 

*********************

Photo: O. Gargominy
http://www.mnhn.fr
https://creativecommons.org/licenses/by-nc-nd/4.0/

*********************  

References:  

[1] Gabrielle Zimmermann; Olivier Gargominy; Benoît Fontaine: Quatre espèces nouvelles d’Endodontidae (Mollusca, Pulmonata) éteints de Rurutu (Îles Australes, Polynésie française). Zoosystema 31(4): 791-805. 2009 
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014  

*********************  

edited: 18.02.2024

Anceyodonta umbilicata Abdou & Bouchet

Umbilicated Disc Snail (Anceyodonta umbilicata)  

This species, which was described based on subfossil shells in 2000, is known exclusively from the island of Taravai, Gambier Islands in French Polynesia. [1]  

*********************  

References  

[1] Ahmed Abdou; Philippe Bouchet: Nouveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints da l’archipel des Gambier (Polynésie). Zoosystema 22(4): 689-707. 2000  

*********************  

edited: 21.03.2018

Australdonta ectopia Solem

Foreign Australdonta Snail (Australdonta ectopia)

The Foreign Australdonta Snail was described in 1976; it is known only from subfossil remains that were found in 1934 on the island of Raivavae, Austral Islands.

The shells reach sizes of about 0.44 to 0.48 cm; they are highly worn and are lacking any traces of their former coloration. [1]

*********************

References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014

*********************

edited: 18.02.2024

Minidonta micra Solem & Cooke

Minute Minidonta Snail (Minidonta micra)  

This species was described in 1976 based on specimens that had been collected in 1934 from a cave on the tiny islet of Aukena in the Gambier group.  

The shells are very small, only about 0,16 to 0,19 cm in diameter. [1]  

***

The species was originally known only from Aukena, but other specimens were subsequently found on the islands of Akamaru, Mangareva and Taravai as well. [2]  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Ahmed Abdou; Philippe Bouchet: Nouveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints da l’archipel des Gambier (Polynésie). Zoosystema 22(4): 689-707. 2000  

*********************  

edited: 04.10.2017

Hirasea major Pilsbry

Large Hirasea Snail (Hirasea major 

This species was described in 1902, it was restricted to the island of Chichijima in the Ogasawara Island group of Japan.  

The shells are quite large for the genus, they reach heights of about 0,33 cm and are up to about 0,67 cm in diameter, they are depressed, lens-shaped, brown, dull and densely striate above, paler and somewhat glossy beneath.  

*********************  

References:  

[1] Henry A. Pilsbry: New land mollusks of the Japanese Empire. The Nautilus 16(4): 45-47. 1902  

********************* 

Photo from: ‘Y. Hirase: The Conchological Magazine 1(1). 1907’

(public domain) 

*********************  

edited: 10.10.2017

Minidonta vallonia Abdou & Bouchet

Vallonia Minidonta Snail (Minidonta vallonia 

This species was described in 2000 based on subfossil shells that were discovered near the cemetery of an abandoned village on the island of Taravai, Gambier Islands.  

The shells are about 0,18 cm in diameter. [1]  

*********************  

References:  

[1] Ahmed Abdou; Philippe Bouchet: Nouveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints da l’archipel des Gambier (Polynésie). Zoosystema 22(4): 689-707. 2000  

*********************  

edited: 05.10.2017

Cookeconcha sp. ‘Barbers Point’

Kalaeloa Cookeconcha Snail (Cookeconcha sp.)

The Kalaeloa Cookeconcha Snail is an undescribed species that is known exclusively from subfossil specimens that were recovered from coastal deposits at Kalaeloa (Barber’s Point) on the island of O’ahu, Hawaiian Islands. [1]

*********************

References:

[1] Patrick V. Kirch; Carl C. Christensen: Nonemarine molluscs and paleoecology at Barber’s Point, O’ahu. Prepared for Archaeological Research Center Hawaii, Inc.. Department of Anthropology; Bernice P. Bishop Museum 1-40. 1980

*********************

edited: 22.04.2019

Orangia maituatensis Solem

Maitua Orangia Snail (Orangia maituatensis)  

This species was described in 1976, it is endemic to the island of Rapa, Austral Islands, where it appears to be (or have been) restricted to cliffs near Maitua in the southern part of the island, and Mt. Tautautu.  

The shells reach sizes of about 0,38 to 0,44 cm in diameter. [1]  

***

The Maitua Orangia Snail was not found during recent field surveys and may be extinct. [2]  

*********************  

References:  

[1] A. Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014  

*********************  

edited: 18.03.2017

Australdonta sulcata Zimmermann, Gargominy & Fontaine

Sulcate Australdonta Snail (Australdonta sulcata)

The Sulcate Australdonta Snail was described in 2009; it is known only from subfossil specimens that were recovered from a locality at the base of a Makatea cliff near the eastern coast of Rurutu, Austral Islands.

The shells reach sizes of about 0.36 cm; they are very worn, creamy white and are decorated with faded orange flammulations.

*********************

References:

[1] Gabrielle Zimmermann; Olivier Gargominy; Benoît Fontaine: Quatre espèces nouvelles d’Endodontidae (Mollusca, Pulmonata) éteints de Rurutu (Îles Australes, Polynésie française). Zoosystema 31(4):791-805. 2009

*********************

edited: 18.02.2024

Gambiodonta pilsbryi Cooke & Solem

Pilsbry’s Gambiodonta Snail (Gambiodonta pilsbryi)

This species was described in 1976 based on 88 specimens that had been collected in 1934 near the Gahutu Bay (often referred to as Ganhutu) on the island of Mangareva, Gambier Islands.

The shells reached average sizes of 0,45 to 0,53 cm in diameter. [1]

***

There are also 79 specimens collected in 1934 on the islet of Aukena, 5 km southeast of Mangareva which originally were described as a distinct subspecies (Gambiodonta pilsbryi ssp. aukenensis Cooke & Solem), but this classification was later rejected. [1][2]

The species also occurred on the islet of Agakauitai, offshore Mangareva Island, where subfossil shells were recovered during field searches in 1997. [2]

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References:

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976
[2] Ahmed Abdou; Philippe Bouchet: Noveaux gastéropodes Endodontidae et Punctidae (Mollusca, Pulmonata) récemment éteints de l’archipel des Gambier (Polynésie). Zoosystea 22(4): 689-707. 2000

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edited: 19.04.2019

Hirasea sinuosa Pilsbry

Sinuose Hirasea Snail (Hirasea sinuosa

The Sinuose Hirasea Snail was described in 1902, it is or was endemic to the island of Hahajima, Ogasawara Islands, Japan.

The shells of this species reached sizes of about 0,21 cm in height and about 0,43 cm in diameter [1]

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Unfortunately it appears to be exremely hard to get any reliable information about this enigmatic snail genus.

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References:

[1] Henry A. Pilsbry: Notices of new Japanese land shells. The Nautilus 15(10): 116-119. 1902

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edited: 11.05.2019

Orangia cookei ssp. cookei Solem

Cooke’s Orangia Snail (Orangia cookei ssp. cookei)  

The genus Orangia contains three species, of which one again, is split into three subspecies; all are endemic to the island of Rapa, Austral Islands; and all were described together in 1976. [1]  

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Cooke’s Orangia Snail is thought to consists of three subspecies, besides the nominate race these are, the Montane Orangia Snail (Orangia cookei ssp. montana Solem), and the Mt. Tautautu Orangia Snail (Orangia cookei ssp. tautautuensis Solem).  

The nominate race is (or rather was) restricted to the vicinity of Mt. Orangi, Mt. Tanga, and Mt. Tepiahu.  

The shells reach sizes of about 0,33 to 0,45 cm in diameter. [1]  

***

The Montane Orangia Snail appears to be the sole survivor of its genus, it is the only species that was found during recent field work. [2]  

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References:  

[1] A. Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014  

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edited: 18.03.2017

Hirasea hypolia Pilsbry

Hypolia Hirasea Snail (Hirasea hypolia 

This species was described in 1902, it was restricted to the island of Chichijima in the Ogasawara Islands group, Japan.  

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It is almost impossible to find out any information about this species and many other invertebrates from Japan.  

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edited: 10.10.2017