Pterophocaena

Pterophocaena; Temporal range: Late Miocene 9.2–9.3 Ma
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Infraorder:	Cetacea
Family:	Phocoenidae
Genus:	Pterophocaena; , , , and , 2012
Species:	P. nishinoi
Binomial name
	Pterophocaena nishinoi; Murakami, Shimada, Hikida, and Hirano, 2011

Pterophocaena nishinoi is an extinct species of porpoise discovered in the Late Miocene of Japan dating to 9.3–9.2 million years ago (mya), and may represent an intermediate phase between porpoises and dolphins. It is one of the oldest species discovered, after the Middle Miocene 16–14.8 mya and the Late Miocene 12.6–9 mya. The holotype specimen comprises a partial skeleton. The genus name derives from Ancient Greek pteryx, "wing," in reference to its unusually pronounced beak, and Latin phocaena, "porpoise." The species name honors the discoverer of the holotype, Takanobu Nishino.^[1]

References[]

^ Murakami, M.; Shimada, C.; Hikida, Y.; Hirano, H. (2011). "A new basal porpoise, Pterophocaena nishinoi (Cetacea, Odontoceti, Delphinoidea), from the upper Miocene of Japan and its phylogenetic relationships". Journal of Vertebrate Paleontology. 32 (5): 1157–1171. doi:10.1080/02724634.2012.677299. S2CID 86825231.

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[1] Murakami, M.; Shimada, C.; Hikida, Y.; Hirano, H. (2011). "A new basal porpoise, Pterophocaena nishinoi (Cetacea, Odontoceti, Delphinoidea), from the upper Miocene of Japan and its phylogenetic relationships". Journal of Vertebrate Paleontology. 32 (5): 1157–1171. doi:10.1080/02724634.2012.677299. S2CID 86825231.

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