Calephelis perditalis, also known as the rounded metalmark or lost metalmark, is a species of butterfly in the family Riodinidae.

It is found in Texas in the United States and Mexico,[2] south to Venezuela.

The species was first described by William Barnes and James Halliday McDunnough in 1918.

The larvae feed on Chromolaena odorata and Eupatorium glabratum.

This Riodinidae-related article is a stub.