Semantoridae

Semantoridae; Temporal range: Late Oligocene - Late Miocene, 24–7.25 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Restored skeleton of Puijila darwini
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Clade:	Pan-Pinnipedia
Family:	†Semantoridae; Orlov, 1931
Genera
	Semantor Orlov, 1931; type; Necromites V. V. Bogachev. 1940; Potamotherium Geoffroy, 1833; Puijila Rybczynski et al., 2009;

Semantoridae is an extinct family of stem-pinnipeds with fossils found in France, Kazakhstan, and Canada, dating back to various points in time in the Miocene epoch.^[1]^[2] Based on their overall anatomy semantorids were not marine specialists, as their elongated bodies, a long tail and robust limbs suggest they were freshwater animals not unlike otters.^[1] Indeed, at least some taxa such as Semantor and Potamotherium were initially classified as mustelids closely related to otters.^[1]

References

^ ^a ^b ^c Berta, A.; Churchill, M. & Boessenecker, R.W. (2018). "The Origin and Evolutionary Biology of Pinnipeds: Seals, Sea Lions, and Walruses". Annual Review of Earth and Planetary Sciences. 46: 203–228. Bibcode:2018AREPS..46..203B. doi:10.1146/annurev-earth-082517-010009.
^ Rybczynski, N.; Dawson, M.R. & Tedford, R.H. (2009). "A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia". Nature. 458 (7241): 1021–24. Bibcode:2009Natur.458.1021R. doi:10.1038/nature07985. PMID 19396145. S2CID 4371413.

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[Berta2018-1] Berta, A.; Churchill, M. & Boessenecker, R.W. (2018). "The Origin and Evolutionary Biology of Pinnipeds: Seals, Sea Lions, and Walruses". Annual Review of Earth and Planetary Sciences. 46: 203–228. Bibcode:2018AREPS..46..203B. doi:10.1146/annurev-earth-082517-010009.

[Rybczynski07-2] Rybczynski, N.; Dawson, M.R. & Tedford, R.H. (2009). "A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia". Nature. 458 (7241): 1021–24. Bibcode:2009Natur.458.1021R. doi:10.1038/nature07985. PMID 19396145. S2CID 4371413.

[1]

[2]

Semantoridae Temporal range: Late Oligocene - Late Miocene, 24–7.25 Ma PreꞒ Ꞓ O S D C P T J K Pg N

Restored skeleton of Puijila darwini
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Clade:	Pan-Pinnipedia
Family:	†Semantoridae Orlov, 1931
Genera
Semantor Orlov, 1931; type Necromites V. V. Bogachev. 1940 Potamotherium Geoffroy, 1833 Puijila Rybczynski et al., 2009