Xenorophidae

Xenorophidae
Temporal range: Oligocene
Skull of Xenorophus sloanii
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Parvorder: Odontoceti
Family: Xenorophidae
Uhen, 2008
Genera

Xenorophidae is an extinct family of dolphin-like odontocetes (toothed whales) that lived in the Southeastern United States during the Oligocene. They were among the first major groups of odontocetes to diversify in the fossil record and are notable for their ability to echolocate.