Cotyloplana is a genus of land planarians in the tribe Rhynchodemini.

The genus Cotyloplana is characterized by a flat body with a wide creeping sole.

There is one sucker located ventrally at the anterior end, in front of the creeping sole.

The copulatory apparatus has a large spacious male atrium, with a small and obtuse penis papilla.

A diverticulum opens into the common atrium from its posterior wall.