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New avialan remains and a review of the known avifauna from the late Cretaceous Nemegt Formation of Mongolia. American Museum novitates ; no. 3447

Show simple item record Clarke, Julia A. en_US Norell, Mark. en_US Mongolian-American Museum Paleontological Project. en_US Mongolyn Shinzhlėkh Ukhaany Akademi. en_US 2005-10-06T16:39:09Z 2005-10-06T16:39:09Z 2004 en_US
dc.description 12 p. : ill., map ; 26 cm. en_US
dc.description Includes bibliographical references (p. 10-12). en_US
dc.description.abstract Small vertebrates have remained relatively poorly known from the Nemegt Formation, although it has produced abundant and well-preserved large dinosaur remains. Here we report three new avialan specimens from the late Cretaceous (Maastrichtian) of Omnogov Aimag, Mongolia. These fossils were collected from the Nemegt Formation exposed at the locality of Tsaagan Khushu in the southern Gobi Desert. All of the new finds are partial isolated bones with a limited number of preserved morphologies; however, they further understanding of dinosaur diversity in the late Cretaceous of Mongolia and, specifically, from the Nemegt Formation. The new specimens are described and evaluated in phylogenetic analyses. These analyses indicate that all three fossils are placed as part of the clade Ornithurae. Avialan diversity of the Nemegt Formation is reviewed and briefly compared with that of the underlying Djadokhta and Barun Goyot Formations. These formations have been considered to represent at least two distinct late Cretaceous environments, with the Nemegt typically interpreted as representing more humid conditions. Ornithurine and enantiornithine birds are known from the Nemegt as well as the Djadokhta and Barun Goyot Formations, although ornithurine remains are more common in the Nemegt. No avialan species known from the Djadokhta, or Barun Goyot, are also known from the Nemegt Formation and, overall, the avialan taxa from these formations do not appear more closely related to each other than to other avialans. Whether these faunal differences are best interpreted as environmental, temporal, or sampling/preservational should be further investigated. en_US
dc.format.extent 449547 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. 3447 en_US
dc.subject.lcc QL1 .A436 no.3447 2004 en_US
dc.subject.lcsh Birds, Fossil -- Mongolia -- Omnogov Aimag. en_US
dc.subject.lcsh Paleontology -- Cretaceous -- Mongolia -- Omnogov Aimag. en_US
dc.subject.lcsh Paleontology -- Mongolia -- Omnogov Aimag. en_US
dc.subject.lcsh Birds -- Phylogeny. en_US
dc.title New avialan remains and a review of the known avifauna from the late Cretaceous Nemegt Formation of Mongolia. American Museum novitates ; no. 3447 en_US
dc.title.alternative New avialan fossils from Mongolia 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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