[dinosaur] Kamuysaurus, new hadrosaur from Late Cretaceous of Japan (free pdf)

Ben Creisler
[email protected]

A new paper in open access:

Kamuysaurus japonicus gen. et sp. nov.

Yoshitsugu Kobayashi, Tomohiro Nishimura, Ryuji Takasaki, Kentaro Chiba,
Anthony R. Fiorillo, Kohei Tanaka, Tsogtbaatar Chinzorig, Tamaki Sato &
Kazuhiko Sakurai  (2019)
A New Hadrosaurine (Dinosauria: Hadrosauridae) from the Marine Deposits of
the Late Cretaceous Hakobuchi Formation, Yezo Group, Japan.
Scientific Reports 9, Article number: 12389
DOI: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1038_s41598-2D019-2D48607-2D1&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=0V2AMXiDbha8DHrLf2MUymhVxuOOv-W3j8-t7ttDwqM&s=y7-bRVpYfO3H0oM4828q_08h7qjaGeUx6mahtjZ0Edc&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nature.com_articles_s41598-2D019-2D48607-2D1&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=0V2AMXiDbha8DHrLf2MUymhVxuOOv-W3j8-t7ttDwqM&s=VZNWoboYZqthfrbOpQ0RxMEc14XifteU37kmjsDsGtk&e= 

Free pdf:
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nature.com_articles_s41598-2D019-2D48607-2D1.pdf&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=0V2AMXiDbha8DHrLf2MUymhVxuOOv-W3j8-t7ttDwqM&s=GQBgDNNqRaV06kQgpCn2oov2SgO_PNS4w4WuoKoyB-M&e= 


A nearly complete skeleton of a new hadrosaurid, Kamuysaurus japonicus gen.
et sp. nov., was discovered from the outer shelf deposits of the Upper
Cretaceous Hakobuchi Formation of the Yezo Group in Hobetsu area of Mukawa
town in Hokkaido, Japan. Kamuysaurus belongs to the sub-clade of
Hadrosaurinae, Edmontosaurini, and forms a monophyly with Laiyangosaurus
and Kerberosaurus from the northern Far East. Kamuysaurus has a long
anterior platform for the nasofrontal sutural surface, which may indicate
the presence of a small supracranial crest, similar to a sub-adult form of
Brachylophosaurus based on the extension of the nasofrontal sutural
surface. The Dispersal Extinction Cladogenesis analysis with the 50%
Majority Rule consensus tree suggests that the clade of Kamuysaurus,
Laiyangosaurus, and Kerberosaurus may have dispersed into Asia prior to the
late Campanian and the potential endemism of this clade during the late
Campanian and early Maastrichtian in the northern Far East. The results of
both Dispersal Extinction Cladogenesis and Ancestral State Reconstruction
analyses imply that the marine-influenced environment in North America
during the Campanian may have played an important role for the hadrosaurid
diversification in its early evolutionary history.

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