Devonian bony fish

Onychodontiformes (also known as Onychodontida and Struniiformes) is an order of prehistoric sarcopterygian fish that lived during the Devonian period. The onychodontiforms are generally regarded as early-diverging members of the coelacanth lineage.

Psarolepis (; psārolepis, from Greek ψαρός 'speckled' and λεπίς 'scale') is a genus of extinct bony fish which lived around 397 to 418 million years ago (Pridoli to Lochkovian stages). Fossils of Psarolepis have been found mainly in South China and described by paleontologist Xiaobo Yu in 1998. It is not known certainly in which group Psarolepis belongs, but paleontologists agree that it probably is a basal genus and seems to be close to the common ancestor of lobe-finned and ray-finned fishes. In 2001, paleontologist John A. Long compared Psarolepis with onychodontiform fishes and refer to th

Platycephalichthys is a genus of tristichopterid lobe-finned fish which lived during the Upper Devonian, Frasnian stage. thumb|left|Restoration

Dipteridae is an extinct family of prehistoric lungfishes which lived in the Devonian period.

Tristichopterus is an extinct genus of Devonian eotetrapodiform fish in the family Tristichopteridae. The type species, T. elatus, was first described by Philip Grey Egerton in 1861 from remains of Givetian age found in Scotland. In 2013, a second species, Eusthenopteron kurshi was attributed to the genus based on remains from Latvia, originally assigned to Eusthenopteron, but this has not been universally recognised, With a maximum length of sixty centimetres, is the smallest genus in the family. Tristichopterus was thought by Egerton to be unique for its time period as a fish with ossified v

species of fish