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- W4249862015 abstract "The poorly known fossil record of fur seals and sea lions (Otariidae) does not reflect their current diversity and widespread abundance. This limited fossil record contrasts with the more complete fossil records of other pinnipeds such as walruses (Odobenidae). The oldest known otariids appear 5-6 Ma after the earliest odobenids, and the remarkably derived craniodental morphology of otariids offers few clues to their early evolutionary history and phylogenetic affinities among pinnipeds. We report a new otariid, Eotaria crypta, from the early middle Miocene “Topanga” Formation (15-17.5 Ma) of southern California, represented by a partial mandible with well-preserved dentition. Eotaria crypta is geochronologically intermediate between “enaliarctine” stem pinnipedimorphs (16.6-27 Ma) and previously described otariid fossils (7.3-12.5 Ma), as well as morphologically intermediate by retaining an M2 and a reduced M1 metaconid cusp and lacking P2-4 metaconid cusps. Eotaria crypta eliminates the otariid ghost lineage and confirms that otariids evolved from an “enaliarctine”-like ancestor." @default.
- W4249862015 created "2022-05-12" @default.
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- W4249862015 date "2017-10-20" @default.
- W4249862015 modified "2023-09-28" @default.
- W4249862015 title "The oldest known fur seal" @default.
- W4249862015 doi "https://doi.org/10.31233/osf.io/jeskv" @default.
- W4249862015 hasPublicationYear "2017" @default.
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