Mammalia - Cetacea - Delphinidae

Alternative combination: Orca paleorca

Full reference: H. Matsumoto. 1937. A new species of orc from the basal Calabrian at Naganuma, Minato Town, Province of Kazusa, Japan. Zoological Magazine 49(8):191-193

Belongs to Orcinus according to P. Hershkovitz 1966

Sister taxa: Orcinus citoniensis, Orcinus meyeri, Orcinus orca

Type specimen: Its type locality is Naganuma, which is in a Calabrian marine conglomerate in the Sanuki Formation of Japan

Ecology: aquatic piscivore-carnivore