A new nonmammalian eucynodont (Synapsida, Therapsida) from the Triassic of northern Gansu Province, China, and its biostratigraphic and biogeographic implications. (American Museum novitates, no. 3685)

Simple item page
dc.contributor.authorGao, Keqin, 1955-
dc.contributor.authorFox, Richard C.
dc.contributor.authorZhou, Chang-Fu.
dc.contributor.authorLi, Da-Qing.
dc.date.accessioned2010-06-30T20:57:11Z
dc.date.available2010-06-30T20:57:11Z
dc.date.issued2010
dc.description24, [1] p. : ill. (some col.), maps (some col.) ; 26 cm. "June 25, 2010." Includes bibliographical references (p. 19-21).en
dc.description.abstractA new trirachodontid eucynodont, Beishanodon youngi, is named and described based on a well-preserved skull from Triassic lacustrine deposits exposed in the Beishan Hills, northern Gansu Province, China. The new discovery documents the second record of trirachodontid eucynodonts known from China, along with Sinognathus gracilis from the Middle Triassic Ermaying Formation exposed in Shanxi Province. Cladistic analysis supports the placement of the new taxon as the sister group of Sinognathus, and the two together can be classified in Sinognathinae, a new subfamily differentiated from other trirachodontids by possession of several derived character states, including extremely short snout and strongly expanded temporal region. In addition, the stratigraphic and biogeographic significance of the new discovery are discussed. Because trirachodontids have a restricted stratigraphic range in the Triassic, as best documented by the Cynognathus Assemblage Zone of South Africa, discovery of the new fossil of this group from northern Gansu Province in China provides definitive evidence for a Triassic age of the fossil-bearing beds exposed in the Beishan Hills; moreover, the fossil beds are assessed as early Triassic in age based on the evidence from the entire vertebrate fauna.en
dc.format.extent8502140 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/6069
dc.language.isoen_USen
dc.publisherAmerican Museum of Natural History.en
dc.relation.ispartofseriesAmerican Museum novitates, no. 3685.en
dc.subjectBeishanodon youngi.en
dc.subjectReptiles, Fossil.en
dc.subjectTherapsida.en
dc.subjectGansu Sheng.en
dc.subjectChina.en
dc.titleA new nonmammalian eucynodont (Synapsida, Therapsida) from the Triassic of northern Gansu Province, China, and its biostratigraphic and biogeographic implications. (American Museum novitates, no. 3685)en
dc.title.alternativeNew nonmammalian eucynodont.en

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
N3685.pdf
Size:
8.11 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

American Museum Novitates