Proaethaspis

Proaethaspis is an extinct monospecific genus of arthrodire placoderm fish from the Early Devonian period. The type species Proaethaspis ohioensis was described in 1960, but was assigned to the genus Proaethaspis in 1978.

Classification
Proaethaspis is one of the more basal members of the order Arthrodira, closely related to Baringaspis, as shown in the cladogram below: