Re: [dinosaur] Bagaceratops ontogeny and variation: junior synonyms Gobiceratops, Lamaceratops, Platyceratops, Magnirostris

[Paul P <turtlecroc@yahoo.com>]

Does anyone have a PDF of this? The library here doesn't have access to it yet. 
Thanks in advance,

    Paul P.


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On Wed, 4/3/19, Ben Creisler <bcreisler@gmail.com> wrote:

Subject: [dinosaur] Bagaceratops ontogeny and variation: junior synonyms 
Gobiceratops, Lamaceratops, Platyceratops, Magnirostris
To: dinosaur-l@usc.edu
Date: Wednesday, April 3, 2019, 11:35 AM
 
Ben Creisler
bcreisler@gmail.com

A new paper:

Åukasz CzepiÅski (2019)
Ontogeny and variation of a protoceratopsid dinosaur Bagaceratops 
rozhdestvenskyi from the Late Cretaceous of the Gobi Desert.
Historical Biology (advance online publication)
doi: 
https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1080_08912963.2019.1593404&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=CBkLPkCxIUV3xmk4DZFiKtBG65WV-9pN9q6x3zhdIo0&s=iHdygxqK5S-ncW5DzAji6WReeKLaJ-u-FCCNQcQMwSQ&e=
   
 
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.tandfonline.com_doi_full_10.1080_08912963.2019.1593404&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=CBkLPkCxIUV3xmk4DZFiKtBG65WV-9pN9q6x3zhdIo0&s=_90MaVjl-qEcPkwlpP31m__FDh8dvjjd3GK_4SG2UlE&e=


Bagaceratops rozhdestvenskyi is a ceratopsian dinosaur from the Late Cretaceous 
Baruungoyot Formation of the Gobi Desert, closely related to Protoceratops spp. 
Several Bag. rozhdestvenskyi skulls demonstrate a wide range of variation in 
their morphology and size. Here I argue that the observed variability is most 
likely of intraspecific nature. Specimens classified in a few allegedly 
distinct species from the same or near-contemporary sediments, namely 
Gobiceratops minutus, Lamaceratops tereschenkoi and Platyceratops tatarinovi 
from Baruungoyot Formation, and Magnirostris dodsoni from Bayan Mandahu, are 
younger subjective synonyms of Bag. rozhdestvenskyi. They plausibly represent 
an ontogenetic series within the latter. Breviceratops kozlowskii is a distinct 
taxon. The evolutionary relationships within Protoceratopsidae are complicated 
by the mosaic distribution of plesiomorphic and derived features in distinct 
species. I suggest that taxa distribution and observed changes in morphology 
are an evidence for the ancestral position of Protoceratops andrewsi among 
protoceratopsids. It implies possible temporary separation between the 
geological formations of the Gobi Desert yielding distinct protoceratopsid 
species. The novel evolutionary scenario suggests number of convergences that 
occurred in Protoceratopsidae and Ceratopsoidea (reduction of the premaxillary 
dentition, fusion of nasals, development of the accessory antorbital fenestra). 
Present study reveals the significance of the intraspecific and ontogenetic 
variation in the study of the neoceratopsian taxonomy.