Yamaceratops dorngobiensis, a new primitive ceratopsian (Dinosauria, Ornithischia) from the Cretaceous of Mongolia ; American Museum novitates, no. 3530

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dc.contributor.authorMakovicky, Peter J.en_US
dc.contributor.authorNorell, Mark.en_US
dc.contributor.authorMongolian-American Museum Paleontological Project.en_US
dc.contributor.authorMongolyn Shinzhlçekh Ukhaany Akademi.en_US
dc.date.accessioned2006-09-18T16:17:37Z
dc.date.available2006-09-18T16:17:37Z
dc.date.issued2006en_US
dc.description42 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 33-35).en_US
dc.description.abstractA new basal neoceratopsian taxon from the eastern Gobi Desert is described. Yamaceratops dorngobiensis, tax. nov., is probably of late Early Cretaceous age, and occupies a phylogenetic position intermediate between Liaoceratops and Archaeoceratops. It is the most basal taxon to display a number of traditional neoceratopsian synapomorphies concentrated in the cheek region and mandible. These include presence of an epijugal, lateral displacement of the coronoid process, a lateral ridge on the surangular for insertion of the jaw adductors, and a lateral wall to the mandibular glenoid. Yamaceratops shares two synapomorphies (tubercles on the ventral edge of the angular and shape of the jugal) with Liaoceratops, indicating that the transient presence of derived characters may be prevalent in the early evolutionary history of Ceratopsia. Yamaceratops shares aspects of frill morphology with Liaoceratops and Leptoceratops that suggest a function unrelated to display for this anatomical structure in basal neoceratopsians, and hints at a more complex evolutionary history for ceratopsian frills. Considerations of patristic distances and mosaic evolution among basal neoceratopsian taxa indicate that a greater diversity of these animals remains undiscovered.en_US
dc.format.extent7307411 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5808
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates, no. 3530en_US
dc.subject.lccQL1 .A436 no.3530 2006en_US
dc.subject.lcshYamaceratops dorngobiensis.en_US
dc.subject.lcshDinosaurs -- Mongolia -- Dornogovʹ Aĭmag.en_US
dc.subject.lcshReptiles, Fossil -- Mongolia -- Dornogovʹ Aĭmag.en_US
dc.subject.lcshPaleontology -- Cretaceous -- Mongolia -- Dornogovʹ Aĭmag.en_US
dc.subject.lcshPaleontology -- Mongolia -- Dornogovʹ Aĭmag.en_US
dc.subject.lcshCeratopsidae -- Phylogeny.en_US
dc.subject.lcshCeratopsidae -- Evolution.en_US
dc.titleYamaceratops dorngobiensis, a new primitive ceratopsian (Dinosauria, Ornithischia) from the Cretaceous of Mongolia ; American Museum novitates, no. 3530en_US
dc.title.alternativeNew Mongolian neoceratopsianen_US
dc.typetexten_US

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