Actinolepidae

Actinolepidae is an extinct family of placoderm fishes which lived during the Early Devonian period. They are considered to be among the most primitive of the arthrodires, and are widely accepted to be phylogenetically basal to the group.

Actinolepidae Temporal range: Early Devonian
reconstruction of Actinolepis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Placodermi
Order:	†Arthrodira
Suborder:	†Actinolepidoidei
Family:	†Actinolepidae
Genera
Actinolepis Aethapsis Aleosteus Bollandapsis Eskimapsis Heightingtonaspis Kujdanowiaspis Lehmanosteus Simblaspis

The bodies of Actinolepids are wide and flat, suggesting that most members of this family were benthic fish. Their jaws were comparatively underdeveloped in comparison to the more robust-jawed arthrodires that would come after them, such as Dunkleosteus and Coccosteus, indicating that it likely subsisted primarily on smaller, softer-bodied animals such as mollusks, or worms instead of larger, tougher prey animals.