Angustassiminea castanea

Angustassiminea castanea is a species of small operculate snail, a terrestrial gastropod mollusk or micromollusk in the family Assimineidae. ^[1]

Angustassiminea castanea
Shell of Angustassiminea castanea (specimens at the Natural History Museum, Rotterdam)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Assimineidae
Genus:	Angustassiminea
Species:	A. castanea
Binomial name
Angustassiminea castanea (Westerlund, 1883)
Synonyms[1]
List Assiminea castanea Westerlund, 1883 (original combination) Assiminea castanea kushimotoensis Kuroda, 1958 (basionym) Assiminea kushimotoensis Kuroda, 1958

Description

The length of the shell attains 5 mm, its diameter 2.5 mm.

(Original description in Latin) The solid shell is imperforate, pyramidally conical and chestnut-colored. It is very shiny, finely striate and spirally lined. The spire is acute. The shell has seven rather convex whorls, which are disjoined by a thin suture. The body whorl is faintly angled, convex at the base, and it nearly occupies half the length of the shell. The aperture ispear-shaped and acute above, with a straight parietal wall. The peristome (margin) is straight, with a arched basal margin. The inner lip is slightly thickened and reflected above. ^[2]

Distribution

This marine species has been found off Japan.