The free open access pdf version is now available at this link:
On Thu, Jul 25, 2019 at 5:09 PM Ben Creisler <bcreisler@gmail.com> wrote:
Ben CreislerA new paper:Psittacosaurus amitabha sp. nov.ÂJames G. Napoli, Tyler Hunt, Gregory M. Erickson & Mark A. Norell (2019)
Psittacosaurus amitabha, a New Species of Ceratopsian Dinosaur from the Ondai Sayr Locality, Central Mongolia.
American Museum Novitates 3932 :1-36
doi: https://doi.org/10.1206/3932.1
https://bioone.org/journals/american-museum-novitates/volume-2019/issue-3932
NOTE: This paper should be posted in open access on the AMNH website soon.
http://digitallibrary.amnh.org/handle/2246/9
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.
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Although the paper itself is not yet posted on the AMNH, the supplemental material is:
Supplemental Material for 'Psittacosaurus amitabha, a new species of ceratopsian dinosaur from the Ondai Sayr locality, central Mongolia. (American Museum Novitates, no. 3932)
Napoli, James G.; Hunt, Tyler; Erickson, Gregory M.; Norell, Mark A.