Osteichthyes Sarcopyterygii, Dipnoi, Crossopterygii, Rhipidistia, Actinistia Actinopterygii, Chondrostei, Polypteriformes, Acipenseriformes Holostei, Teleostei cosmoid, ganoid, elasmoid scales ...
Discovery of an unusually intact and ancient fossil fish provides further evidence that the search for modern vertebrate origins requires breaking out of the Devonian and into the preceding period. So ...