- Source: Amastra subobscura
Amastra subobscura is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Subspecies
Amastra subobscura puella Pilsbry & C. M. Cooke, 1914
Amastra subobscura subobscura Hyatt & Pilsbry, 1911
Description
The length of the shell attains 11.9 mm, its diameter 6 mm.
(Original description) The shell contains 6 whorls. The shell is minutely perforate, oblong-conic, and relatively thin with a slight sheen. The spire's outlines are nearly straight. The whorls of the protoconch are reddish-brown, with a smooth initial half-whorl followed by a coarsely costate whorl that is carinated just above the suture. The subsequent whorl is finely and densely costulate, with a subtle angularity near the lower suture.
The later whorls are convex, adorned with growth wrinkles and subplicate ridges just below the suture. They are pale fleshy-gray, partially covered by a very thin, smooth olivaceous cuticle, which is darkest on the latter half of the body whorl and absent near the aperture.
The aperture is pinkish-white, with the outer lip remaining unthickened. The parietal callus is whitish and moderately thick.
Distribution
This species is endemic to Hawaii, occurring on Molokai Island.
References
Cowie, R. H., Evenhuis, N. L. & Christensen, C. C. (1995). Catalog of the native land and freshwater molluscs of the Hawaiian Islands. vi. Leiden: Backhuys Publishers. p. 107.{{cite book}}: CS1 maint: multiple names: authors list (link)