Anachis nigrofusca
Anachis nigrofusca is a species of sea snail in the family Columbellidae, the dove snails.
Description
The length of the shell attains 7.8 mm.The shell is smaller and conoid, with the margins of the more or less elevated spire appearing excurvate. It is blackish-brown, marked with livid, radiating, somewhat undulate, and inconspicuous lines. The shell comprises six normal whorls. These are flattened and have a slightly impressed suture.
The shell features numerous radiating costules that are continuous to the base, with small, spirally decussate interspaces and impressed lines. The sculpture is often obsolete. Spiral striae are conspicuous around the base.
The aperture is oblong. The outer lip is varicose, sinuate posteriorly, and is 7-dentate internally. The inner lip is conspicuous and nearly smooth. The operculum is unguiform, with an anterior apex.