Eurycaraspis

Eurycaraspis incilis is an extinct petalichthyid placoderm from the Middle Devonian of China. It is closely related to Quasipetalichthys.

Anatomy
Eurycaraspis incilis differs from Quasipetalichthys by having a more circular-shaped skull.

Phylogeny
Eurycaraspis incilis is considered a basal petalichthyid, and is placed in Quasipetalichthyidae as Quasipetalichthys' sister taxon. Quasipetalichthyidae, in turn, is considered the sister group of Macropetalichthyidae.