Aulophyseter is an extinct genus of sperm whales from the subfamily Physeterinae that existed during the Miocene.
Fossils of Aulophyseter have been found in:
Aulophyseter is estimated to have been long, and weighed approximately .
Aulophyseters 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. The diet of Aulophyseter was largely limited to cephalopods and fish.