Aulophyseter morricei

Aulophyseter morricei is an extinct sperm whale of the Miocene and a species of the genus Aulophyseter, which is placed in the subfamily Physeterinae. Fossils of the genus have been found in the Oidawara Formation of Japan and in the United States, in the Temblor Formation of California and the St. Marys Formation of Maryland. Aulophyseter is estimated to have been 6.4 metres (21 feet) long and to have weighed about 1,100 kilograms (2,400 pounds). Its small teeth lack enamel, which suggests that its feeding habits were more similar to those of modern sperm whales than to other early sperm whales, and its diet was largely limited to cephalopods and fish.