Psittacosaurus amitabha, a new species of ceratopsian dinosaur from the Ondai Sayr locality, central Mongolia. (American Museum novitates, no. 3932)
dc.contributor.author | Napoli, James G. | |
dc.contributor.author | Hunt, Tyler. | |
dc.contributor.author | Erickson, Gregory M. | |
dc.contributor.author | Norell, Mark. | |
dc.date.accessioned | 2019-07-24T18:15:39Z | |
dc.date.available | 2019-07-24T18:15:39Z | |
dc.date.issued | 2019-07-25 | |
dc.description | 36 pages : illustrations (chiefly color), color map ; 26 cm. | en_US |
dc.description.abstract | Psittacosaurus is the most speciose nonavian dinosaur genus, represented by at least 10 (and possibly as many as 19) species uncovered over a wide geographic range. Here, we report a new species of large-bodied Psittacosaurus from the Ondai Sayr locality in central Mongolia, which has hitherto produced only one other Psittacosaurus specimen. This new species is characterized by: (1) an elongate snout, with a gently inclined rostronasal margin, (2) a cranium dorsally convex rather than flat, (3) a subtemporal length less than 40% of total skull length, (4) a maxillary lamina that cups the posterior toothrow, (5) five premaxillary foramina arrayed in an arc, (6) an antorbital fossa as long as it is wide, and (7) a palpebral with a well-developed posterior tonguelike process. Psittacosaurus amitabha is resolved as the most basal member of the genus Psittacosaurus in our phylogenetic analysis. This taxon expands our knowledge of the already-speciose genus Psittacosaurus as well as our understanding of the Ondai Sayr fauna, which is poorly known in comparison to other Mongolian Early Cretaceous localities. | en_US |
dc.identifier.uri | http://digitallibrary.amnh.org/handle/2246/6953 | |
dc.language.iso | en_US | en_US |
dc.publisher | American Museum of Natural History. | en_US |
dc.relation.ispartofseries | American Museum novitates;no.3932. | |
dc.relation.uri | https://doi.org/10.5531/sd.sp.34 | |
dc.subject | Psittacosaurus amitabha. | en_US |
dc.subject | Psittacosaurus. | en_US |
dc.subject | Dinosaurs. | en_US |
dc.subject | Mongolia. | en_US |
dc.title | Psittacosaurus amitabha, a new species of ceratopsian dinosaur from the Ondai Sayr locality, central Mongolia. (American Museum novitates, no. 3932) | en_US |
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