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Semantoridae

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Extinct family of mammals

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

Restored skeleton ofPuijila darwini
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Clade:	Pan-Pinnipedia
Family:	†Semantoridae Orlov, 1931
Genera
SemantorOrlov, 1931; type NecromitesV. V. Bogachev. 1940 PotamotheriumGeoffroy, 1833 PuijilaRybczynski et al.,2009

Semantoridae is an extinct family of stem-pinnipeds with fossils found inFrance,Kazakhstan, andCanada, dating back to various points in time in theMiocene 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 unlikeotters.^[1] Indeed, at least some taxa such asSemantor andPotamotherium were initially classified asmustelids closely related to otters.^[1]

References

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^^a ^b ^cBerta, 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.

Genera ofpinnipeds and their stem-allies

Kingdom:Animalia
Phylum:Chordata
Class:Mammalia
Order:Carnivora
Suborder:Caniformia
Infraorder:Arctoidea

Pan-Pinnipedia

†Amphicynodontidae	Allocyon Amphicticeps Amphicynodon Drassonax Kolponomos Pachycynodon Parictis Wangictis
†Semantoridae	Necromites Potamotherium Puijila Semantor

Pinnipedimorpha

†Enaliarctos

Pinnipediformes

Pinnipedia

Phocidae

†Devinophoca

Monachinae

†Magnotherium
Monachini	†Afrophoca †Auroraphoca †Messiphoca Monachus Neomonachus †Eomonachus †Noriphoca †Palmidophoca †Pliophoca †Pontophoca †Pristiphoca †Terranectes
Miroungini	†Callophoca Mirounga
Lobodontini	†Acrophoca †Australophoca †Hadrokirus †Homiphoca Hydrurga Leptonychotes Lobodon Ommatophoca †Piscophoca †Properiptychus †Virginiaphoca

Phocinae

†Cryptophoca †Frisiphoca †Kawas †Leptophoca †Monachopsis †Monotherium †Phocanella †Prophoca †Sarmatonectes
Erignathini	Erignathus †Platyphoca
Cystophorini	Cystophora †Miophoca †Pachyphoca
Phocini	†Batavipusa †Gryphoca Halichoerus Histriophoca †Nanophoca Pagophilus Phoca †Planopusa †Praepusa Pusa

Otarioidea	see below↓

†Dusignathinae	Dusignathus Gomphotaria
Odobeninae	†Aivukus Odobenus †Ontocetus †Pliopedia †Protodobenus †Valenictus

Panotariidae

†Eotaria

Otariidae

Callorhinae

Callorhinus
†Pithanotaria

Otariinae

†Thalassoleon
Zalophini	Eumetopias †Oriensarctos †Proterozetes Zalophus
Otariini	Arctocephalus Arctophoca †Hydrarctos Neophoca Otaria Phocarctos

Lists
List of pinnipeds List of fossil pinnipedimorphs

Taxon identifiers
Semantoridae	Wikidata:Q33138060 Wikispecies:Semantoridae EoL:42399873 Paleobiology Database:175490

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