Parapontoporia

Parapontoporia is an extinct genus of dolphin that lived off the Pacific coast of North America from the Late Miocene until the genus' extinction during the Pliocene.^[1][2] It is related to the baiji.^[3] Fossils have been found in California (Tulare Formation) and Mexico (Almejas Formation). The Tulare Formation is predominately freshwater, which suggests Parapontoporia may have been tolerant of both salt and fresh water.^[3]

Parapontoporia Temporal range: Late Miocene–Pliocene PreꞒ Ꞓ O S D C P T J K Pg N
Reconstruction of Parapontoporia pacifica (top) with the fossil porpoise Piscolithax tedfordi
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Suborder:	Whippomorpha
Infraorder:	Cetacea
Family:	Lipotidae
Genus:	†Parapontoporia Barnes, 1984
Type species
†Parapontoporia pacifica
Species
P. pacifica Barnes, 1984 P. sternbergi Gregory and Kellogg, 1927 P. wilsoni Barnes, 1985

Skull (left), along with the skull of Semirostrum.