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Cranial osteology of Haplocheirus sollers Choiniere et al., 2010 (Theropoda, Alvarezsauroidea). (American Museum novitates, no. 3816)

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dc.contributor.author Choiniere, Jonah N.
dc.contributor.author Clark, James Matthew, 1956-
dc.contributor.author Norell, Mark.
dc.contributor.author Xu, Xing, 1969-
dc.date.accessioned 2014-10-22T22:33:27Z
dc.date.available 2014-10-22T22:33:27Z
dc.date.issued 2014-10-22
dc.identifier.uri http://hdl.handle.net/2246/6555
dc.description 44 pages : illustrations (1 color), map ; 26 cm. en_US
dc.description.abstract The basalmost alvarezsauroid Haplocheirus sollers is known from a single specimen collected in Upper Jurassic (Oxfordian) beds of the Shishugou Formation in northwestern China. Haplocheirus provides important data about the plesiomorphic morphology of the theropod group Alvarezsauroidea, whose derived members possess numerous skeletal autapomorphies. We present here a detailed description of the cranial anatomy of Haplocheirus. These data are important for understanding cranial evolution in Alvarezsauroidea because other basal members of the clade lack cranial material entirely and because derived parvicursorine alvarezsauroids have cranial features shared exclusively with members of Avialae that have been interpreted as synapomorphies in some analyses. We discuss the implications of this anatomy for cranial evolution within Alvarezsauroidea and at the base of Maniraptora. 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. 3816. en_US
dc.subject Haplocheirus sollers. en_US
dc.subject Skull. en_US
dc.subject Alvarezsauroidea. en_US
dc.subject Dinosaurs. en_US
dc.subject Xinjiang Uygur Zizhiqu (China) en_US
dc.subject Shishugou Formation (China) en_US
dc.subject China. en_US
dc.title Cranial osteology of Haplocheirus sollers Choiniere et al., 2010 (Theropoda, Alvarezsauroidea). (American Museum novitates, no. 3816) en_US
dc.title.alternative Haplocheirus sollers. 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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