The fossil was from the early Jurassic period about 190 million years ago. But being the first does not mean it is the oldest. That title goes to a marine animal called the placoderm, also called ...

Its fossils, however, are highly compressed ... showing a mosaic of features exhibited by osteostracans and some placoderms, as well as both chondrichthyans and osteichthyans.” ...

They CT scanned a fossil specimen of Bothriolepis canadensis, a placoderm fish with bony head plates that lived in the Late Devonian period about 380 million years ago. The placoderm skeleton had ...

Fossil taxa include lungfish and other sarcopterygians, a variety of placoderms and actinopterygians. Fossil fishes include the largest actinopterygian known, Leedsichthys problematica. It was a ...