Aquatic Adaptation and Swimming Mode Inferred from Skeletal Proportions in the Miocene Desmostylian Desmostylus
dc.contributor.author | Gingerich, Philip D. | en_US |
dc.date.accessioned | 2006-09-11T15:30:32Z | |
dc.date.available | 2006-09-11T15:30:32Z | |
dc.date.issued | 2005-06 | en_US |
dc.identifier.citation | Gingerich, Philip D.; (2005). "Aquatic Adaptation and Swimming Mode Inferred from Skeletal Proportions in the Miocene Desmostylian Desmostylus ." Journal of Mammalian Evolution 12 (1-2): 183-194. <http://hdl.handle.net/2027.42/44971> | en_US |
dc.identifier.issn | 1064-7554 | en_US |
dc.identifier.issn | 1573-7055 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/44971 | |
dc.description.abstract | Desmostylians are enigmatic, extinct, semiaquatic marine mammals that inhabited coastlines of the northern Pacific Rim during the late Oligocene through middle Miocene. Principal components analysis (PCA) of trunk and limb proportions provides a rational multivariate context for separating living semiaquatic mammals on three orthogonal axes: a size axis (PC-I), a degree of aquatic adaptation axis (PC-II), and a forelimb- versus hind-limb-dominated locomotion axis (PC-III). The necessary skeletal measurements are available for Desmostylus hesperus but not for other desmostylians. Among species similar in size to Desmostylus in the study set, the one most similarly proportioned is the polar bear. Projection of Desmostylus on PC-II shows it to have been more aquatic than a polar bear (indicated by its relatively short ilium and femur, combined with relatively long metapodals and phalanges). Projection of Desmostylus on PC-III suggests that its aquatic locomotion was even more forelimb-dominated than that of a bear (indicated by its relatively long metacarpal III and corresponding proximal phalanx, combined with a relatively short metatarsal III and corresponding proximal phalanx). Desmostylians were different from all living semiaquatic mammals, and desmostylians are properly classified in their own extinct order, but their skeletal proportions suggest that bears provide an appropriate baseline for imagining what desmostylians were like in life. | en_US |
dc.format.extent | 340208 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Kluwer Academic Publishers-Plenum Publishers; Springer Science + Business Media, Inc. | en_US |
dc.subject.other | Semiaquatic Mammals | en_US |
dc.subject.other | Desmostylia | en_US |
dc.subject.other | Human Genetics | en_US |
dc.subject.other | Life Sciences | en_US |
dc.subject.other | Evolutionary Biology | en_US |
dc.subject.other | Swimming Style | en_US |
dc.subject.other | Locomotion | en_US |
dc.subject.other | Desmostylus | en_US |
dc.title | Aquatic Adaptation and Swimming Mode Inferred from Skeletal Proportions in the Miocene Desmostylian Desmostylus | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Geological Sciences and Museum of Paleontology, The University of Michigan, Ann Arbor, Michigan, 48109-1079, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/44971/1/10914_2005_Article_5719.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/s10914-005-5719-1 | en_US |
dc.identifier.source | Journal of Mammalian Evolution | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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