Anacithara osumiensis

Anacithara osumiensis is a species of sea snail, a marine gastropod mollusc in the family Horaiclavidae.

R.N. Kilburn disputed in 1994 that Mangilia osumiensis should belong to the genus Anacithara, as it shows features that are unknown in Anacithara, such as two vestigial folds on the inner lip.

Description
The length of the dark white, fusiform shell attains 4.5 mm, its diameter 2 mm. The shell contains 7 whorls and is distinctly spirally striated. The aperture is oblong. The sinus is very short. The wide siphonal canal is curved.

Distribution
This marine species occurs off the coasts of Japan.