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Gobiconodonts from the early Cretaceous of Oshih (Ashile), Mongolia. American Museum novitates ; no. 3348

Show simple item record Rougier, Guillermo W. en_US Novacek, Michael J. en_US McKenna, Malcolm C. en_US Wible, John R. en_US Mongolian-American Museum Paleontological Project. en_US Mongolyn Shinzhlėkh Ukhaany Akademi. en_US 2005-10-06T16:42:16Z 2005-10-06T16:42:16Z 2001 en_US
dc.description 32 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 22-27). en_US
dc.description.abstract We describe here the first discovered mammalian remains from the Mongolian early Cretaceous locality Oshih (Ashile). Four fragmentary, tooth-bearing specimens, probably corresponding to three individuals, have been recovered. All the fossils can be assigned to the family Gobiconodontidae (Chow and Rich, 1984). The specimens include three lower jaw fragments and one upper jaw fragment, and represent at least two different taxa. Gobiconodon hopsoni, n. sp., is described and diagnosed here. This new species is larger than G. ostromi (early Cretaceous Cloverly Formation, USA); thus, it is the largest triconodont and one of the largest Mesozoic mammals known. Gobiconodon sp., found also at Oshih, is slightly larger than G. borissiaki, from the early Cretaceous of Khoobur, Mongolia, but smaller than G. ostromi. The specimens of this second species are poorly preserved and provide insufficient data for a diagnosis. The status of the different species of Gobiconodon and the new gobiconodontid Hangjinia is reviewed. In gobiconodontids and Triconodontidae, the maxillae appear to make a significant contribution to the orbital rim, a condition unusual among basal mammals, in which the lacrimal and jugal are the main components. Other triconodonts such as Jeholodens, likely an "amphilestid", appear to show the primitive mammalian condition for this feature. We present a brief consideration of triconodont relationships and discuss alternative placements of Gobiconodon among Mammaliaformes. en_US
dc.format.extent 508475 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, NY : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 3348 en_US
dc.subject.lcc QL1 .A436 no.3348 2001 en_US
dc.subject.lcsh Gobiconodontidae. en_US
dc.subject.lcsh Mammals, Fossil -- Mongolia. en_US
dc.subject.lcsh Paleontology -- Cretaceous -- Mongolia. en_US
dc.subject.lcsh Paleontology -- Mongolia. en_US
dc.title Gobiconodonts from the early Cretaceous of Oshih (Ashile), Mongolia. American Museum novitates ; no. 3348 en_US
dc.title.alternative Early Cretaceous Gobiconodonts en_US
dc.type text en_US

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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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