The Shortish Leptachtina Snail was described in 1869, the species is known from a place named Kaholuamano at an elevation of about 1219 m on the island of Kaua’i, Hawaiian Islands.
The shells reached heights of about 0,8 cm. [1]
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References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
The Deceiving Leptachatina Snail was described in 1927.
The species is known from subfossil specimens that were recovered from the sandy deposits at Ha’ena on the north coast of Kaua’i, Hawaiian Islands. [1]
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References:
[1] Theodore D. A. Cockerell: Two species of Leptachatina from the island of Kauai. Journal of Conchology 18(4): 117. 1927
The Irregular Leptachatina Snail was described in 1855. [or 1856, according to which source]
This species, if it is accepted as one, is apparently only known from one collection [or even from only one specimen?], that was collected somewhere on the “Sandwich Islands”, the exact origin is not known.
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The The Irregular Leptachatina Snail, however, has not been accepted by all authors, and if it has been, it was sometimes placed into the genus Amastra, it is now thought to most certainly be identical with Leptachatina fusca Newcomb. [1]
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References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
The Simple Leptachatina Snail was described in 1869, it was endemic to the island of Hawai’i, Hawaiian Islands, where it was found in the Kona district and in the Waimea region at elevations of 915 to about 1220 m.
The shells reached a height of only about 0,8 cm.
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
The Dark Leptachatina Snail, described in 1869, was endemic to the island of Kaua’I, where it was found at several localities in the Waimea Canyon area, for example Halemanu, Kaholuamano, and Pu’u Ka Pele.
The shells of this species reached an average height of about 1,2 cm.
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
The Antique Leptachatina Snail was described in 1870, it was already extinct at that date as the author mentions in the description.:
“The shell is subfossil, oblong subcylindrical, solid scarcely rimate, longitudinally faintly striate; whorls 7, flatly convex, narrowly margined at the suture; spire somewhat obtuse; aperture oblong oval; columella obliquely truncate; columellar fold obsolete. Length 9.0, diam. 3,5 mm.” [1]
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The species was apparently a inhabitant of lowland areas and thus disappeared directly after the arrival of the first Polynesian settlers.
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References:
[1] W. Harper Pease: Observations sur les espèces de Coquilles terrestres qui habitent l’île de Kauai (îles Hawaii), accompagnées de descriptions d’espèces nouvelles. Journal de conchyliologie. 3e série. tome Xe. Vol. 18: 87-97. 1970
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
This species was described in 1914, it inhabited an area around the town of Lahaina at the west coast of Maui, Hawaiian Islands.
The shells reached lengths of about 0,63 cm. [1]
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References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 23: Appendix to Amastridae. Tornatellinidae. Index, vols. XXI-XXIII 1915-1916
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 23: Appendix to Amastridae. Tornatellinidae. Index, vols. XXI-XXIII 1915-1916‘
The Thin-ribbed Leptachatina Snail was described in 1869, the species is apparently known exclusively from [sub]fossil shells that had been recovered from a deposit on the island of Hawai’i, Hawaiian Islands.
The shells reached an average height of about 0,8 cm
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
The Sharpened Leptachatina Snail from the island of Kaua’i, Hawaiian Islands, was described in 1848, it is the type of its genus and appears to be known only from a single broken shell.
“The species seems to be entirely distinct from any other species, and does not seem to have been rediscovered since the original material was collected.” [1]
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The single known shell reaches a height of about 1,25 cm. [1]
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References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
As its name implies, the Fossil Leptachatina Snail from the island of Kaua’I, Hawaiian Islands was already extinct when it was described in 1911.:
“The shell is umbilicate, conically ovate, white (in a fossil state) ….” [1]
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The shell was very small, reaching a height of only about 0,7 cm. The Fossil Leptachatina Snail very likely was among the first snail species to disappear after the arrival of men.
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References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
The Shining Leptachatina Snail was described in 1853, it was endemic to the island of Maui, where it apparently was restricted to at least two populations at Kula and Ulapalakua on the western slopes of the Haleakala volcano in the eastern part of the island.
The shells reached lengths of about 0,8 to 1 cm. [1]
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There are several specimens, apparently originating from the islands of Moloka’i and O’ahu, that are sometimes assigned to this species, very probably erroneously. [1]
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References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’
This is an undescribed species that is known from about six populations, both on eastern and western Maui, Hawaiian Islands.
The species was recorded in the 1940s and 1960s from the Hanaula-iki- and Iao Valleys, from the Wahikuli Gulch and from other places; the last record dates to 1971, when only a single population was left.
The West Maui Leptachatina Snail was a ground-dwelling species that was found in leaf litter, it is certainly extinct like most other members of this genus.
