Amastra cornea

Amastra cornea
Conservation status
Extinct  (IUCN 2.3) [1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Amastridae
Genus:	Amastra
Species:	†A. cornea
Binomial name
†Amastra cornea (Newcomb, 1854)
Location of Oʻahu
Synonyms
Achatinella corneaNewcomb, 1854 superseded combination Amastra (Metamastra) cornea(Newcomb, 1854) alternative representation

Amastra cornea was a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae. ^[2]

Description

(Original description) The shell is irregularly acutely conical with a pointed apex and an inflated body whorl. It is thin and corneous, adorned with minute longitudinal striations. Comprising seven rounded whorls, the shell features a subovate aperture with a thin, translucent lip. The columella is straight, white, and equipped with a transverse, plaited tooth.

The shell's coloration is a uniform dark horn, contrasting with the white columella and tooth. ^[3]

Distribution

This extinct species was endemic to Oʻahu, and was known from around Waialua.

References

1. Mollusc Specialist Group (1996). "Amastra cornea". IUCN Red List of Threatened Species . 1996 e.T990A13100871. doi: 10.2305/IUCN.UK.1996.RLTS.T990A13100871.en . Retrieved 16 November 2021.
2. Amastra cornea (Newcomb, 1854) . 21 November 2024. Retrieved through: World Register of Marine Species .
3. Newcomb, W. (1854). "Descriptions of seventy·nine new species of Achatinella, (Swains.), a genus of pulmoniferous mollusks, in the collection of Hugh Cuming, Esq". Proceedings of the Zoological Society of London. 21: 142. Retrieved 19 November 2024. This article incorporates text from this source, which is in the public domain .