Trilobites were marine arthropods that flourished in the Paleozoic Era. They went extinct at the end of the Permian period.
Blastoids
Blastoids were marine echinoderms that had a flower-like shape. They went extinct at the end of the Permian period.
Crinoidea (Sea Lilies)
Crinoids (Sea lilies) were marine echinoderms that attached themselves to the seafloor. They went extinct at the end of the Permian period.
Bryozoa
Bryozoa were colonial animals that formed encrusting growths on the seafloor. They went extinct at the end of the Permian period.
Brachiopods
Brachiopods were marine animals that had two hinged shells. They went extinct at the end of the Permian period.
Goniatites
Goniatites were marine cephalopods that lived in coiled shells. They went extinct at the end of the Permian period.
Ammonites
Ammonites were marine cephalopods that lived in coiled shells. They went extinct at the end of the Permian period.
Nautiloids
Nautiloids were marine cephalopods that lived in coiled shells. They went extinct at the end of the Permian period.
Conodonts
Conodonts were small, eel-like animals that lived in the oceans. They went extinct at the end of the Permian period.
Synergidodon
Synergidodon was a synapsid that went extinct at the end of the Permian period.
Edaphosaurus
Edaphosaurus was a synapsid that went extinct at the end of the Permian period.
Dimetrodon
Dimetrodon was a synapsid that went extinct at the end of the Permian period.
Eotitanosuchus
Eotitanosuchus was a traversodont that went extinct at the end of the Permian period.