Mecyclothorax altiusculus (Britton 1938)

Mecyclothorax altiusculus is a species of ground beetle in the subfamily Psydrinae. It was described by Britton in 1938.

This species is known to occupy habitats on Mont Aorai from 1255 to 1940 m elevation. All associated ecological data place it in the axils of dead, decaying Freycinetia fronds, where is occurs microsympatrically with Mecyclothorax altiusculoides.