Genus: Cameroceras
…is a genus of extinct nautiloid cephalopods that lived during the Ordovician period. Members of the genus were quite large and some species grew to lengths of over 6 meters, making them one of the largest animals alive during the Paleozoic era. Due to its large size Cameroceras was likely an ‘apex predator’ and likely fed on smaller cephalopods, trilobites, and sea scorpions.
Phylogeny
Animalia-Mollusca-Cephalopoda-Nautiloidea-Endocerida-Endoceratidae-Cameroceras