Pleurotoma (Mangilia) platycheila E. A. Smith, 1882 (original combination) Anacithara platycheila is a species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.

[1] The length of the ovate, dirty white shell attains 6.5 mm, its diameter 2+2⁄3 mm.

The outer lip is conspicuously thin, very dilated laterally and slightly sinuate on top.

The open siphonal canal is very short.

The single reddish-brown band around the body whorl and the broadly expanded lip at once mark the distinctness of this species.