Prehistoric fish

Devonian Fish Series #11: Fish of the Hunsruck slate, Germany (Emsian): The Heterostraci Drepanaspis and the placoderms Lunaspis, Gemuendina, Stensioella, and Pseudopetalichthys

The discovery in an open coal mine in Volgograd, Russia, shows a fossilised arsenal of radial teeth belonging to the cartilaginous Helicoprion - that lived millions of years before the dinosaurs.

During the Sheinwoodian Age (Early Wenlock, Early Silurian), fish were still mostly jawless. Represented here: Lasanius, Birkenia, Ciderius, Lanarkia, Shielia, Archipelepis, Pezopallichthys, Athenaegis, Ateleaspis , Shuyu, Meishanaspis, Changxingaspis by Nobumichi Tamura

Dunkleosteus (meaning "Dunkle's bone") was a large placoderm fish that lived in the late Devonian period, about 382–358 million years ago.[1] It has been estimated to have grew to 4.1 metres (12.3 feet), and was the top predator of its time and the Paleozoic era as a whole. Dunkleosteus belongs to the Placodermi, a large, paraphyletic clade of armor-plated fishes likely ancestral to all living gnathostomes. More precisely, it was an arthodire, part of a clade which possessed skulls that had…

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