gyrolepis

Century Dictionary and Cyclopedia

1. n. A genus of heterocereal ganoid fishes characterized by having the anterior rays of the pectoral fins not, articulated and scales marked with irregular wrinkles. It is common in the Mesozoic rocks.

GNU Webster's 1913

1. n. (Paleon.) A genus of ganoid fishes, found in strata of the new red sandstone, and the lias bone beds.