Re-assessment of varanid evolution based on new data from Saniwa ensidens Leidy, 1870 (Squamata, Reptilia). American Museum novitates, no. 3630.

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dc.contributor.author Conrad, Jack L.
dc.contributor.author Rieppel, Olivier.
dc.contributor.author Grande, Lance.
dc.date.accessioned 2009-01-16T13:58:53Z
dc.date.available 2009-01-16T13:58:53Z
dc.date.issued 2008
dc.identifier.issn 0003-0082
dc.identifier.uri http://hdl.handle.net/2246/5939
dc.description 15 p. : ill. ; 26 cm. Includes bibliographical references (p. 11-14). en
dc.description.abstract Saniwa ensidens is a pivotal taxon for understanding varanid evolution. A complete specimen of Saniwa ensidens was recently described, offering important new insights into the morphology of this taxon. We apply these new data to a broader-scale study of squamate relationships in order to understand the phylogenetic position of Saniwa ensidens and of varanids more generally. Among the other fossils included in our analysis were the Eocene taxon "Saniwa" feisti, the Miocene Varanus rusingensis, and the giant Pleistocene varanid Megalania prisca. We compare the phylogenetic hypothesis from our analysis of morphology with a recent molecular-based hypothesis and find numerous differences in the phylogenetic relationships within Varanus. We constrained our morphological data set to the phylogenetic pattern presented by the molecular data to further analyze the possible phylogenetic relationships of the fossil taxa. Our analyses show that Saniwa ensidens is the sister taxon to crown-group Varanus and that "Saniwa" feisti is a basal member of the varanid lineage, not closely related to Saniwa ensidens. Both Varanus rusingensis and Megalania prisca are members of the crown radiations of Varanus. en
dc.format.extent 585202 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher New York, NY : American Museum of Natural History en
dc.relation.ispartofseries American Museum novitates ; no. 3630 en
dc.subject Saniwa ensidens. en
dc.subject Monitor lizards. en
dc.subject Wyoming. en
dc.title Re-assessment of varanid evolution based on new data from Saniwa ensidens Leidy, 1870 (Squamata, Reptilia). American Museum novitates, no. 3630. en
dc.title.alternative Varanid evolution en
dc.type Article en

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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