[dinosaur] Psittacosaurus amitabha, new species from Cretaceous Ondai Sayr Locality, Mongolia

Ben Creisler
[email protected]

A new paper:

Psittacosaurus amitabha sp. nov.

James 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://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1206_3932.1&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=f7Gfuh6XAotPvkTJP8_YogR8HqNdaZMOBqcT3Bc_PsA&s=dhFu-x3zpbzAYY2cBZQgIKuhK77GMMszCxYFTR-sbY8&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__bioone.org_journals_american-2Dmuseum-2Dnovitates_volume-2D2019_issue-2D3932&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=f7Gfuh6XAotPvkTJP8_YogR8HqNdaZMOBqcT3Bc_PsA&s=3-hi__SYwmyq0AisB3tyQABl3dvavXmv8E2o6gb-9ng&e= 

NOTE: This paper should be posted in open access on the AMNH website soon.

https://urldefense.proofpoint.com/v2/url?u=http-3A__digitallibrary.amnh.org_handle_2246_9&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=f7Gfuh6XAotPvkTJP8_YogR8HqNdaZMOBqcT3Bc_PsA&s=iOLn0scvsl4I9p9WK2Xpi4NAN-XP8gdcompn6Extpvw&e= 

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.

===

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.

https://urldefense.proofpoint.com/v2/url?u=http-3A__digitallibrary.amnh.org_handle_2246_6954&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=f7Gfuh6XAotPvkTJP8_YogR8HqNdaZMOBqcT3Bc_PsA&s=INIQQFPE3pRAHh0faGIutmlGyeuGkaxLkq9oZt5CJn0&e= 

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