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New saurolophine from Far Eastern Russia
Godefroit P, Bolotsky YL, Lauters P (2012) A New Saurolophine Dinosaur
from the Latest Cretaceous of Far Eastern Russia. PLoS ONE 7(5):
main dinosaur sites have been investigated in latest Cretaceous
deposits from the Amur/Heilongjiang Region: Jiayin and Wulaga in China
(Yuliangze Formation), Blagoveschensk and Kundur in Russia (Udurchukan
Formation). More than 90% of the bones discovered in these localities
belong to hollow-crested lambeosaurine saurolophids, but flat-headed
saurolophines are also represented: Kerberosaurus manakini at Blagoveschensk
and Wulagasaurus dongi at Wulaga.
Herein we describe a new saurolophine dinosaur, Kundurosaurus nagornyi
gen. et sp. nov., from the Udurchukan Formation (Maastrichtian) of
Kundur, represented by disarticulated cranial and postcranial material.
This new taxon is diagnosed by four autapomorphies.
A phylogenetic analysis of saurolophines indicates that Kundurosaurus nagornyi
is nested within a rather robust clade including Edmontosaurus spp.,
Saurolophus spp., and Prosaurolophus maximus, possibly as a sister-taxon for
also from the Udurchukan Formation of Far Eastern Russia. The high
diversity and mosaic distribution of Maastrichtian hadrosaurid faunas in
the Amur-Heilongjiang region are the result of a complex
palaeogeographical history and imply that many independent hadrosaurid
lineages dispersed without any problem between western America and
eastern Asia at the end of the Cretaceous.