Amastra crassilabrum

Amastra crassilabrum is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusks in the family Amastridae. ^[3]

Amastra crassilabrum
Conservation status
Extinct  (IUCN 2.3)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Amastridae
Genus:	Amastra
Species:	†A. crassilabrum
Binomial name
†Amastra crassilabrum Newcomb, 1854[2]
Location of Oʻahu
Synonyms
Achatinella crassilabrum Newcomb, 1854 superseded combination Amastra (Metamastra) crassilabrum (Newcomb, 1854) alternative representation

Description

(Original description) The shell is conically ovate, pointed at the apex, and ventricose toward the base, with a rather solid structure. It consists of six rounded whorls and features an ovate aperture. The outer lip is significantly thickened internally, while the short columella terminates in a prominent oblique plait. The surface is marked by strong longitudinal striations, with the body whorl often bearing cicatrices.

The body whorl is yellowish-white, contrasting with the dark brown or black coloration of the upper whorls. ^[4]

Distribution

This species was endemic to Oʻahu, and was known from the Waiʻanae Range.