Ceratodus
Ceratodus (from Ancient Greek: κέρας, romanized: kéras, lit. 'horn' and ὀδούς, odoús, 'tooth') is an extinct genus of freshwater lungfish that was found worldwide during the Mesozoic Era. It has been described as a "catch all", and a "form genus" used to refer to the remains, typically toothplates, of a variety of lungfish belonging to the extinct family Ceratodontidae.