A small derived theropod from Öösh, early Cretaceous, Baykhangor Mongolia ; American Museum novitates, no. 3557

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dc.contributor.authorTurner, Alan H. (Alan Hamilton)en_US
dc.contributor.authorHwang, Sunny H.en_US
dc.contributor.authorNorell, Mark.en_US
dc.contributor.authorMongolian-American Museum Paleontological Project.en_US
dc.contributor.authorMongolyn Shinzhlekh Ukhaany Akademi.en_US
dc.date.accessioned2007-03-23T16:22:43Z
dc.date.available2007-03-23T16:22:43Z
dc.date.issued2007en_US
dc.description27 p. : ill., map ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 11-13).en_US
dc.description.abstractA new theropod dinosaur, Shanag ashile, from the early Cretaceous Öösh deposits of Mongolia is described here. The new specimen (IGM 100/1119) comprises a well-preserved right maxilla, dentary, and partial splenial. This specimen exhibits a number of derived theropod features, including a triangular anteriorly tapering maxilla, a large antorbital fossa, and maxillary participation in the caudally elongate external nares. These features resemble the early Cretaceous dromaeosaurids Sinornithosaurus millenii and Microraptor zhaoianus, as well as the basal avialan Archaeopteryx lithographica. A comprehensive phylogenetic analysis including 58 theropod taxa unambiguously depicts the new Öösh theropod as a member of Dromaeosauridae. Relative to other dromaeosaurids, Shanag ashile is autapomorphic in its lack of a promaxillary fenestra and in the presence of interalveolar pneumatic cavities. The discovery of IGM 100/1119 expands our knowledge of early Cretaceous dromaeosaurids and the faunal similarity between the Öösh and the Jehol biotas.en_US
dc.format.extent6062920 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5845
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates, no. 3557en_US
dc.subject.lccQL1 .A436 no.3557, 2007en_US
dc.subject.lcshShanag ashile.en_US
dc.subject.lcshSkull -- Anatomy.en_US
dc.subject.lcshDromaeosauridae -- Mongolia -- Ba�i�ankhongor A�imag.en_US
dc.subject.lcshDinosaurs -- Mongolia -- Ba�i�ankhongor A�imag.en_US
dc.subject.lcshReptiles, Fossil -- Mongolia -- Ba�i�ankhongor A�imag.en_US
dc.subject.lcshPaleontology -- Cretaceous -- Mongolia -- Ba�i�ankhongor A�imag.en_US
dc.subject.lcshPaleontology -- Mongolia -- Ba�i�ankhongor A�imag.en_US
dc.titleA small derived theropod from Öösh, early Cretaceous, Baykhangor Mongolia ; American Museum novitates, no. 3557en_US
dc.title.alternativeÖösh theropoden_US
dc.typetexten_US

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