A new crocodyliform from Zos Canyon, Mongolia. American Museum novitates ; no. 3445

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dc.contributor.authorPol, Diego.en_US
dc.contributor.authorNorell, Mark.en_US
dc.contributor.authorMongolian-American Museum Paleontological Project.en_US
dc.contributor.authorMongolyn ShinzhlÄ—kh Ukhaany Akademi.en_US
dc.date.accessioned2005-10-06T16:39:05Z
dc.date.available2005-10-06T16:39:05Z
dc.date.issued2004en_US
dc.description36 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 23-26).en_US
dc.description.abstractHere we report on a new fossil crocodyliform from Cretaceous Redbeds in the Zos Canyon, Gobi Desert, Mongolia. This new taxon, Zosuchus davidsoni, is described based on the information provided by five specimens collected during expeditions of the Mongolian Academy of Sciences-American Museum of Natural History. Zosuchus davidsoni is identifiable by numerous characters, including a posteriorly extensive secondary palate that opens through a secondary choana bordered by the palatines and pterygoids near the posterior edge of the skull, and a lacrimal-premaxillary contact on the dorsal surface of the snout. The phylogenetic relationships of Zosuchus davidsoni are shown through a parsimony analysis in the context of Crocodyliformes. This new form is found to be a late-appearing basal crocodyliform, forming a monophyletic group with two other taxa from the early Cretaceous of China. Because of the basal position of Zosuchus within Crocodyliformes, the marked posterior extension of the secondary palate is most parsimoniously interpreted as a convergence with the derived condition of neosuchian crocodyliforms.en_US
dc.format.extent1455442 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/2810
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 3445en_US
dc.subject.lccQL1 .A436 no.3445, 2004en_US
dc.subject.lcshZosuchus davidsoni.en_US
dc.subject.lcshCrocodilians, Fossil -- Mongolia.en_US
dc.subject.lcshReptiles, Fossil -- Mongolia.en_US
dc.subject.lcshPaleontology -- Cretaceous -- Mongolia.en_US
dc.subject.lcshPaleontology -- Mongolia.en_US
dc.subject.lcshPaleontology -- Gobi Desert (Mongolia and China)en_US
dc.subject.lcshCrocodilians -- Phylogeny.en_US
dc.titleA new crocodyliform from Zos Canyon, Mongolia. American Museum novitates ; no. 3445en_US
dc.title.alternativeCrocodyliform from Mongoliaen_US
dc.typetexten_US

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