Tag Archives: Pupillidae

Lyropupa rhabdota ssp. baldwiniana Cooke

Lanai Striped Lyropupa Snail (Lyropupa rhabdota ssp. lanaiensis)

This form, described in 1920, was restricted to the island of Maui, Hawaiian Islands.

“Specimens from West Maui agree very closely with the type form in shape, color, etc., but are slightly smaller. They differ mainly in that the embryonic whorls are much more finely striate spirally, and in the presence of a minute basal fold and the more axially seated columellar fold. There are usually about two more ribs on the last whorl, which is furnished with from 15 to 17. Length 2.5, diam. 1.5, apert. 1.0 mm.; 51/4 whorls.
…
From L. r. lanaiensis it is separated by its more convex and swollen whorls, lighter color and much more finely spirally striate embryonic whorls.” [1]

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According to a study from the year 2018, all Hawaiian species of this genus are now sadly extinct. [2]

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’

(public domain)

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References:   

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[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

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edited: 25.02.2024

Lyropupa rhabdota ssp. pluris Cooke & Pilsbry

Many-striped Lyropupa Snail (Lyropupa rhabdota ssp. pluris)

This taxon was described in 1920; it is known from Kaunakakai at the central southern coast of Moloka’i, Hawaiian Islands; they were found quite abundantly among dead leaves in humid, shady places.

The shells reach sizes of about 0.22 to 0.24 cm in height; they differ from the nominate race in being shorter and having rather weaker, less regular spiral striae. [1]

***

According to a study from the year 2018, all Hawaiian species of this genus are now sadly extinct. [2]

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’

(public domain)

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References:   

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[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

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edited: 25.02.2024

Lyropupa lyrata ssp. lyrata (Gould)

Fiddle-shaped Lyropupa Snail (Lyropupa lyrata ssp. lyrata)

This species was described in 1843; it was originally found to be very abundant in the Ko’olau Mountains on the island of O’ahu, Hawaiian Islands.

The shells reach heights of about 0.25 cm; they are described as being small, most generally sinistral, chestnut colored, widely umbilicate and having five convex whorls with about 20 neatly clathrate flexuous riblets; the aperture is somewhat orbicular, bell-shaped, posteriorly armed with two lamella-like teeth and two additional ones in the throat. [1]

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“The variations and races of lyrata will not be understood until specimens from a large number of places are opened for study of the palatal folds. It will probably be found necessary to recognize a number of local races.” [1]

***

According to a study from the year 2018, all Hawaiian species of this genus are now sadly extinct. [2]

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’

(public domain)

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References:   

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[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

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edited: 25.02.2024

Lyropupa rhabdota ssp. rhabdota Cooke & Pilsbry

Striped Lyropupa Snail (Lyropupa rhabdota ssp. rhabdota)

The Striped Lyropupa Snail was described in 1920; it was endemic to the island of Moloka’i, Hawaiian Islands where it probably was very widespread but apparently not common.:

“There can be no doubt that this species is distributed over the whole of the wooded portion of Molokai. Unfortunately it has never been found in any number in any one locality and in none of the lots are there more than half a dozen specimens – in most of them only 1 to 3.” [1]

The shells reach sizes of about 0.27 cm in length. “This species is, at first glance, very similar to some of the forms of lyrata from Oahu. It is easily separated by the different sculpture of the embryonic whorls and the longer lower palatal fold.” [1]

***

According to a study from the year 2018, all Hawaiian species of this genus are now sadly extinct. [2]

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’

(public domain)

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References:   

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[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

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edited: 25.02.2024

Lyropupa truncata Cooke

Truncated Lyropupa Snail (Lyropupa truncata)

This species was described in 1908, it was endemic to the Kohala Volcano in the northern part of Hawai’i, Hawaiian Islands.

The shells were very distinct, they were covered with transverse striae that were strongly developed, with cuticular margins which could very easily be broken, they reached sizes of about 0,26 cm in length. 

***

According to a study from 2018, sadly all Hawaiian species of the genus Lyropupa are now extinct. [2]

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References:

[1] C. Montague Cooke Jr.: A new species of Lyropupa. Bishop Museum Occasional Papers 3(2): 211-212. 1908
[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

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Depiction from: ‘C. Montague Cooke Jr.: A new species of Lyropupa. Bishop Museum Occasional Papers 3(2): 211-212. 1908’

(public domain)

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edited: 08.05.2019

Lyropupa rhabdota ssp. lanaiensis Cooke

This form, described in 1920, was restricted to the island of Lana’i, Hawaiian Islands.

“Specimens from Lanai differ slightly from the Molokai form. The shells are slightly smaller, more conical in outline, tapering more gradually towards a somewhat acute summit; they are darker colored and with the pale zone only indicated near the aperture. There are 16 to 18 ribs on the last whorl; the embryonic whorls, under a strong lens, are distinctly, spirally striate; the columellar fold enters obliquely, is short, almost nodule-like when viewed above, and there is usually a minute basal fold, situated deep within. Length 2.5, diam. 1.5, apert. 0.92 mm.; 5 1/2 whorls.” [1]

***

According to a study from the year 2018, all Hawaiian species of this genus are now sadly extinct. [2]

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’

(public domain)

*********************   

References:   

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[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

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edited: 25.02.2024

Lyropupa ovatula Cooke & Pilsbry

Egg-shaped Lyropupa Snail (Lyropupa ovatula)  

This species was described in 1920, it was restricted to the island of O’ahu, Hawaiian Islands.  

The shells reached sizes of about 0,22 cm.  

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The Egg-shaped Lyropupa Snail was apparently already extinct when it was described.:  

“The specimens are all dead, apparently being Holocene fossils. They vary in color from vinaceous-cinnamon to cartridge-buff, or of the former tint with a cartridge-buff median zone. …” [1]  

***

An additional form, Lyropupa ovatula ssp. kona Pilsbry & Cooke, was described in 1920 as a subspecies based on (sub)fossil specimens from Hawai’i and Moloka’i, which, however, most likely represent two distinct species.  

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References:  

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[2] 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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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’  

(public domain)


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edited: 04.11.2017

Lyropupa perlonga (Pease)

Koko Head Lyropupa Snail (Lyropupa perlonga)  

This species was described in 1871.  

The Koko Head Lyropupa Snail was endemic to the island of O’ahu, Hawaiian Islands, and was said to be very abundant and widespread as a fossil in the 19th century, but was rarely found alive.  

The shells reached sizes of about 0,24 cm in heigth and were uniformly brown.  

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The author of the species writes a bit about its geographical distribution.:  

“Very abundant in pleistocene and holocene deposits on the coastal plain of Oahu, Diamond Head eastward; Kailua; living examples from Koko Head.” [1]  

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There are at least two additional forms that were assigned as subspecies to this species: Lyropupa perlonga ssp. filocostata Cooke & Pilsbry, from Kaua’i and Ni’ihau, which most likely is a distinct species, and Lyropupa perlonga ssp. interrupta Pilsbry & Cooke. [1]  

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The Koko Head Lyropupa Snail is now considered extinct.  

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References:  

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[2] 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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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’  

(public domain)

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edited: 22.04.2019