Placoderm
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Placoderms are vertebrate animals of the class Placodermi, an extinct group of prehistoric fish known from Paleozoic fossils during the Silurian and the Devonian periods. While their endoskeletons are
Bothriolepis panderi
Dunkleosteus, among the first of the vertebrate apex predators, was a giant armoured placoderm predator.
Amazichthys, a pelagic arthrodire from the Middle Famennian of the Late Devonian.
Fin spine of Eczematolepis, from the Middle Devonian of Wisconsin.
Gnathostomata
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Gnathostomata are jawed vertebrates. Gnathostome diversity comprises roughly 60,000 species, which accounts for 99% of all extant vertebrates, including all living bony fishes and cartilaginous fishes
Placoderm
…articulated armoured plates (hence the name), and the rest of the body was scaled or naked depending on the species. Placoderms were among the first jawed fish (their jaws likely evolved from the first pair of gill arches), as well as the first vertebrates to have true teeth. They were also the first fish clade…
Dunkleosteus terrelli skull, Royal Tyrrell Museum, Drumheller, Alberta, 2025 07 13
Wikilemon Nbrevirostris 1 Terry Goss
Pygocentrus nattereri Karlsruhe Zoo 01
Nile crocodile head