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Anatomy of Mahakala omnogovae (Theropoda, Dromaeosauridae), Tögrögiin Shiree, Mongolia. (American Museum novitates, no. 3722)

Show simple item record Turner, Alan H. (Alan Hamilton) Pol, Diego. Norell, Mark. Mongolian-American Museum Paleontological Project. Mongolyn Shinzhlėkh Ukhaany Akademi. 2011-10-05T20:18:06Z 2011-10-05T20:18:06Z 2011-10-05
dc.description 66 p. : ill. ; 26 cm. en_US
dc.description.abstract The dromaeosaurid Mahakala omnogovae is known from a unique specimen from the late Cretaceous deposits of the Djadokhta Formation at Tögrögiin Shiree, Ömnögov Aimag, Mongolia. The holotype specimen is comprised of a well-preserved but partial skull and a nearly complete postcranial skeleton. Mahakala omnogovae is included in a comprehensive phylogenetic analysis of Coelurosauria using a dataset, which reflects a greatly expanded character set and taxon-sampling regime. Several interesting features of Mahakala omnogovae have implications for deinonychosaurian and avialan character evolution and for understanding patterns of size variation and size change within paravian theropods. These morphologies include the shape of the iliac blade, the triangular obturator process of the ischium, and the evolution of the subarctometatarsalian condition. We present an expanded diagnosis of Mahakala omnogovae which included following unique combination of characters (autapomorphies noted by *): a ledgelike depression at the confluence of metotic strut and posterior tympanic recess on the anterior face of the paroccipital process*, a posteriorly tapering scapula; a shortened forelimb (humerus 50% femur length); a strongly compressed and anteroposteriorly broad ulna tapering posteriorly to a narrow edge*; elongate lateral crest on the posterodistal femur*; anterior caudal vertebrae with subhorizontal, laterally directed prezygapophyses*; a prominent supratrochanteric process; and the absence of a cuppedicus fossa. en_US
dc.language.iso en_US en_US
dc.publisher American Museum of Natural History. en_US
dc.relation.ispartofseries American Museum novitates, no. 3722. en_US
dc.subject Mahakala omnogovae. en_US
dc.subject Dinosaurs. en_US
dc.subject Ȯmnȯgovʹ Aĭmag (Mongolia) en_US
dc.subject Mongolia. en_US
dc.title Anatomy of Mahakala omnogovae (Theropoda, Dromaeosauridae), Tögrögiin Shiree, Mongolia. (American Museum novitates, no. 3722) en_US
dc.title.alternative Mahakala anatomy and phylogeny. 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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