New Whale From The Eocene Of Pakistan And The Origin Of Cetacean Swimming
dc.contributor.author | Gingerich, Philip D. | en_US |
dc.contributor.author | Raza, S. M. | en_US |
dc.contributor.author | Arif, M. | en_US |
dc.contributor.author | Anwar, M. | en_US |
dc.contributor.author | Zhou, X. Y. | en_US |
dc.date.accessioned | 2009-06-01T17:24:24Z | |
dc.date.available | 2009-06-01T17:24:24Z | |
dc.date.issued | 1994-04-28 | en_US |
dc.identifier.citation | Gingerich, PD; Raza, SM; Arif, M; Anwar, M; Zhou, XY. (1994) "New Whale From The Eocene Of Pakistan And The Origin Of Cetacean Swimming." Nature 368(6474): 844-847. <http://hdl.handle.net/2027.42/62571> | en_US |
dc.identifier.issn | 0028-0836 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/62571 | |
dc.description.abstract | MODERN whales (order Cetacea) are marine mammals that evolved from a land-mammal ancestor, probably a cursorial Palaeocene-Eocene mesonychid(1-3). Living whales are streamlined, lack external hind limbs, and all swim by dorsoventral oscillation of a heavily muscled tail(4,5). A steamlined rigid body minimizes resistance, while thrust is provided by a lunate horizontal fluke attached to the tail at a narrow base or pedicle(6). We describe here a new 46-47-million-year-old archaeocete intermediate between land mammals and later whales. It has short cervical vertebrae, a reduced femur, and the flexible sacrum, robust tail and high neural spines on lumbars and caudals required for dorsoventral oscillation of a heavily muscled tail. This is the oldest fossil whale described from deep-neritic shelf deposits, and it shows that tail swimming evolved early in the history of cetaceans. | en_US |
dc.format.extent | 463214 bytes | |
dc.format.extent | 2489 bytes | |
dc.format.mimetype | application/octet-stream | |
dc.format.mimetype | text/plain | |
dc.publisher | Macmillan Magazines Ltd. | en_US |
dc.source | Nature | en_US |
dc.title | New Whale From The Eocene Of Pakistan And The Origin Of Cetacean Swimming | en_US |
dc.type | Article | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationother | GEOL SURVEY PAKISTAN,PALEONTOL & STRATIG BRANCH,ISLAMABAD,PAKISTAN | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/62571/1/368844a0.pdf | |
dc.identifier.doi | http://dx.doi.org/10.1038/368844a0 | en_US |
dc.identifier.source | Nature | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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