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Kuroyuriella, Asagaolacerta, Hakuseps, new lizards from Early Cretaceous of Japan (free pdf)



Ben Creisler
bcreisler@gmail.com

A new paper in open access:

Susan E. Evans and Ryoko Matsumoto (2015)
An assemblage of lizards from the Early Cretaceous of Japan.
Palaeontologia Electronica 18.2.36A: 1-36
palaeo-electronica.org/content/2015/1271-japanese-fossil-lizards
http://palaeo-electronica.org/content/2015/1271-japanese-fossil-lizards

http://zoobank.org/FB40EDBC-4B8B-4E0F-857E-C5AE6CC78C5A



The Early Cretaceous deposits of the Tetori Group of western Japan
have yielded a diverse wetland vertebrate fauna including both aquatic
and terrestrial components. The latter include several lizards, three
of which have been named and described in detail: Kaganaias
hakusanensis, a long-bodied aquatic lizard; Kuwajimalla kagaensis, a
herbivorous borioteiioid; and Sakurasaurus shokawensis, a relative of
the Chinese Jehol genus Yabeinosaurus. Here we describe lizard
material from the Shiramine locality representing five or six
additional taxa, three of which are named herein: a small lizard
represented by two associations, but of unresolved phylogenetic
position; a slightly larger lizard with tricuspid teeth that is
related to borioteiioids; and a bizarre lizard with bicuspid teeth
represented by a single, but morphologically unique, jaw. The three
additional lizard morphotypes are unnamed. One has bicuspid teeth but
unspecialised jaws. The second has small unicuspid teeth in a dentary
bearing a deep coronoid process and resembling the dentary of the
enigmatic Late Cretaceous Mongolian Myrmecodaptria microphagosa. The
third morphotype is represented by a single fragmentary specimen and
has small teeth in a deep jaw. Together, the Kuwajima lizards form a
phylogenetically and morphologically diverse assemblage.