Petalichthyida
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Petalichthyida is an extinct order of small, flattened placoderm fish. They are typified by their splayed pectoral fins, exaggerated lateral spines, flattened bodies, and numerous tubercles that decor
Lunaspis broili
Palaeacanthaspis vasta
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
Petalichthyida
…Petalichthyida is an extinct order of small, flattened placoderm fish. They are typified by their splayed pectoral fins, exaggerated lateral spines, flattened bodies, and numerous tubercles that decorated all of the…
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.