Tag Archives: Sinployea

Sinployea planospira (Garrett)

Plane-spired Sinployea Snail (Sinployea planospira)

This species was described in 1881; it was restricted to the island of Rarotonga, Cook Islands.

The shells reach sizes of 0,34 to 0,43 cm in diameter.

The species is now extinct.

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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

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edited: 02.08.2022

Sinployea peasei Solem

Pease’s Sinployea Snail (Sinployea peasei)

Pease’s Sinployea Snail was described in 1983; it is known from the slopes of Mt. Maungaroa and several other mountainous areas on the island of Rarotonga, Cook Islands, it was formerly quite common and widespread.

The shells reached sizes of 0,29 to about 0,4 cm in diameter.

The species is now extinct.

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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

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edited: 02.08.2022

Sinployea youngi (Garrett)

Young’s Sinployea Snail (Sinployea youngi)

This species was described in 1872; it was endemic to a single (unknown) valley on the island of Rarotonga, Cook Islands and was described by its author as: “A somewhat rare species, easily known by its wide open umbilicus, few whorls, deep uniform brown color, and plicate striae. On the ground in damp woods, and only noticed in a single valley.“. [1]

The shells reach sizes of about 0,49 cm in diameter; they are: “Widely, perspectively umbilicated, thin, shining, subpellucid, uniform dark brown, closely, obliquely, arcuately, plicately striate, more slightly below, suture channeled; whorls 4 1/2, convex, rapidly increasing, the last deflected above, convex below.” [2]

The species is now extinct.

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References:

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887
[3] 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

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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)

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edited: 02.08.2022

Sinployea harveyensis (Garrett)

Harvey’s Sinployea Snail (Sinployea harveyensis)

Harvey’s Sinployea Snail was described in 1872; it was endemic to the island of Rarotonga, Cook Islands, where it was considered: “A common species found under rotten wood.“. [1]The shells reached sizes of 0,39 to about 0,52 cm in diameter; they are: “Moderately, deeply umbilicated, thin, subpellucid, greenish ash color, arcuately tessellated with chestnut, densely finely plicate-striate, striae oblique, sinuous, less distinct on the base, suture channeled; whorls 5, slowly increasing, the last obtusely angulated, deflected above, convex below.“. [2]

The species is now extinct.

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References:

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887
[3] 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

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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)

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edited: 02.08.2022

Sinployea clista Solem

Closed Sinployea Snail (Sinployea clista)  

This species was described in the year 1983.  

The ‘species’ occurs on the islands of Tutuila and ‘Upolu, the respective populations, however, differ from each other, and with certainty represent at least distinct subspecies, or possibly even species.  

The shells reach sizes of about 0,21 to 0,29 cm in diameter. [1]  

***

The population of the island of ‘Upolu was not found again during field searches in the years from 1992 to 1994, and is now most probably wiped out. [2]  

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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

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edited: 23.08.2017

Sinployea tenuicostata (Garrett)

Weak-grooved Sinployea Snail (Sinployea tenuicostata)

This species was described in 1872; it is endemic to the island of Rarotonga, Cook Islands; it was originally described by its author as: “A very pretty and somewhat rare species, having a wide range on the island, and generally found on the ground on the sides of ravines” [1]

The shells reach average sizes of about 0,45 cm; they are: “Perspectively umbilicated, thin, pellucid, a little shining, light corneous, not variegated, laminately costate, the ribs thin, rather close, oblique, slightly sinuous, continued on the base, interstices lightly, closely striate, suture deep; whorls 4, plano-convex, rapidly enlarging, base convex.” [2]

The species is now extinct.

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References:

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887
[3] 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

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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)

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edited: 02.08.2022

Sinployea aunuuana Solem

Aunuu Sinployea Snail (Sinployea aunuuana)  

This species, which is restricted to the small island of ‘Aunu’u offshore Tutuila’s east coast in the American part of Samoa, was described in the year 1983.  

The shell reaches an average size of 0,28 cm in diameter. [1]  

***

The island of ‘Aunu’u was investigated in intensive field studies in the year 2001, when the island was found to be infested with two alien snail species: the Two-toned Gulella (Huttonella bicolor (Hutton)), and the West African Streptostele Snail (Streptostele musaecola (Morelet)); both are known to be invasive, mainly snail-eating species, and both are found on many Pacific islands now.  

The Aunuu Sinployea Snail was not found in 2001, and is now considered most likely extinct. [2]  

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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; Rebecca J. Rundell: The Land Snails of a small tropical island, Aunu’u, American Samoa. Pacific Science 56(2): 143-147. 2002

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edited: 21.04.2019

Sinployea proxima (Garrett)

Rarotongan Sinployea Snail (Sinployea proxima)
 

This species was described in 1872; it was endemic to the island of Rarotonga,Cook Islands, where it apparently was quite common and widespread; A. J. Garrett, the author of the species, gave the following information about it.: 

“A common species lurking under stones and among rotten wood. It was found in several villages.” [1] 

***

The shells reach an average size of about 0,35 cm in diameter. 

The Rarotongan Sinployea Snail was not recorded since the mid-1800s and thus is considered extinct. [2] 

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References: 

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] Fred J. Brook: Coastal landsnail fauna of Rarotonga, Cook Islands: systematics, diversity, biogeography, faunal history, and environmental influences. Tuhinga 21: 161-252. 2010 

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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)

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edited: 02.08.2022

Sinployea muri Brook

Muri Sinployea Snail (Sinployea muri)

This species was described in 2010; it is known only from subfossil shells that were recovered from the coastal plain near Muri on the eastern coast of Rarotonga in the Cook Islands.

The shells were very small, reaching sizes of only up to 0,26 cm in diameter.

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References:

[1] Fred J. Brook: Coastal landsnail fauna of Rarotonga, Cook Islands: systematics, diversity, biogeography, faunal history, and environmental influences. Tuhinga 21: 161-252. 2010

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edited: 02.08.2022

Sinployea otareae (Garrett)

Otarea Sinployea Snail (Sinployea otareae)

The Otarea Sinployea Snail was described in 1872; the species was endemic to the island of Rarotonga, Cook Islands.

“This species is confined to a single valley, where I found it abundantly, under dead wood on the banks of a stream. Living examples are uniform deep black.“. [1]

The shells reached sizes of up to 0,52 cm in diameter. [2]

The species is now clearly extinct.

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References:

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] 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

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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)

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edited: 02.08.2022

Sinployea complementaria (Mousson)

Complementary Sinployea Snail (Sinployea complementaria)

This species was described in 1865; it was restricted to the island of ‘Upolu, Samoa.

The shells reach sizes of 0,43 to 0,59 cm in diameter, making it one of the largest members of its genus; they are: “Rather narrowly umbilicated, rugose, striate-costulate, with curved-back radiations of white and grayish corneous, suture subimpressed; whorls 5, slowly increasing, the last not descending, oblique, obtusely subangulated, flatly rounded below; right margin of peristome subincurved.” [1]

The species wasn’t found during recent surveys and might well be extinct.

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References:

[1] G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887
[2] 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

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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)

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edited: 02.08.2022

Sinployea tupapa Brook

Tupapa Sinployea Snail (Sinployea tupapa)  

The Tupapa Sinployea Snail was described in 2010 based on subfossil shells that had been found at Matavera, Pue, and Tupapa on the northeastern coast of Rarotonga, Cook Islands.  

The species differs from other species of similar small size by its widely open umbilicus, the shells reach an average size of about 0,19 to 0,22 cm in diameter.  

The species is now extinct. [1]  

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References:  

[1] Fred J. Brook: Coastal landsnail fauna of Rarotonga, Cook Islands: systematics, diversity, biogeography, faunal history, and environmental influences. Tuhinga 21: 161-252. 2010

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edited: 11.06.2020

Sinployea rotumana (E. A. Sm.)

Rotuman Sinployea Snail (Sinployea rotumana)

This species was described in 1897; it is endemic to the island of Rotuma (apparently including some of the smaller offshore islets) north of the Fijian Islands, as far as I know it is known from seven or eight specimens only.

The Rotuman Sinployea Snail inhabited the leaf litter on the forest floors.

The shells reach sizes of about 0,26 to 0,33 cm in diameter.

***

The island’s snail fauna was surveyed in 1938 when a single empty shell was recovered; none was found in the next survey in 2012, it is clearly extinct today. [1][2]

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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] Gilianne Brodie; Gary M. Bakker; Froseann Stevens; Monifa Fiu: Preliminary re-survey of the land snail fauna of Rotuma: conservation and biosecurity implications. Pacific Conservation Biology 20(1): 94-107. 2014

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edited: 02.08.2022

Sinployea rudis (Garrett)

Rough Sinployea Snail (Sinployea rudis)  

This species, which was endemic to Rarotonga, Cook Islands, was discovered in 1869 and described three years later, in 1872.  

A. J. Garrett, the author of the species, gave the following information about it.:  

“A common species of a very rude aspect, easily distinguished by its rude, irregular lamellar ribs. We found examples in several different villages; all found on the ground in damp woods.” [1]  

***

The species is also known from subfossil shells that were commonly found in coastal deposits in northern, southeastern, and southern Rarotonga.  

The shells of this species reached an average size of about 0,35 to 0,48 cm in diameter, with the subfossil shells being generally smaller than those found alive in the 19th century.  

The Rough Sinployea Snail was not found during the next field studies in the 1920s, it obviously disappeared shortly after the date of its discovery. [2]  

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References:  

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872 
[2] Fred J. Brook: Coastal landsnail fauna of Rarotonga, Cook Islands: systematics, diversity, biogeography, faunal history, and environmental influences. Tuhinga 21: 161-252. 2010  

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Depiction from: ‘G. W. Tryon: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’  

(not in copyright)

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edited: 19.03.2017

Sinployea decorticata (Garrett)

Decorticated Sinployea Snail (Sinployea decorticata)

This species was described in 1872; it was endemic to the island of Rarotonga, Cook Islands and was considered: “A common species found on the ground in a mountain ravine.“. [1]

The shells reach sizes of 0,37 to 0,51 cm in diameter; they are: “Moderatley, deeply umbilicated, thin, subpellucid, ash-colored under a brownish corneous epidermis, decorticated in adults, rarely strigated with chestnut, arcuately costate, the interstices very lightly striated, suture channeled; whorls 5, convex, slowly increasing, the last deflected above, rounded below, periphery obsoletely angulated.“. [2]

The species is now extinct.

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

References:

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887
[3] 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

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

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)

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edited: 02.08.2022

Sinployea canalis (Garrett)

Grooved Sinployea Snail (Sinployea canalis)

 

The Grooved Sinployea Snail was described in 1872, apparently based on 13 specimens; at that time, it was already: “A somewhat rare species, found on the ground in damp forests, and confined to a single valley. its flat spire, deeply channeled suture, and very wide umbilicus are its most important characters.” [1]

The shells reached sizes of about 0,4 to 0,55 cm in diameter; they are: “widely umbilicate, flatly discoid, thin, subpellucid, slightly glossy, closely and very finely ribbed, ribs oblique, sinuous, light brownish horn color, with darker radiating spots; spire very flat, not rising above the penultimate whorl; suture deeply channeled; whorls 5, strongly convex, regularly increasing, last one declivous above the periphery, rounded below; umbilicus deep, perspective, freely exposing all the whorls, nearly half the diameter of the shell; aperture oblique, sinuously rounded; peristome thin, simple, slightly sinuous.” [1]

The species disappeared shortly after its description.

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References:

[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] 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

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

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)

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edited: 02.08.2022