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Asprosaurus, new lizard (Monstersauria) from Cretaceous of South Korea



Ben Creisler
bcreisler@gmail.com


With all the Brontosaurus stuff today, another taxon:


Jin-Young Park, Susan E. Evans & Min Huh (2015)
The first lizard fossil (Reptilia: Squamata) from the Mesozoic of South Korea.
Cretaceous Research 55: 292–302
doi:10.1016/j.cretres.2015.03.001
http://www.sciencedirect.com/science/article/pii/S0195667115000300


Upper Cretaceous deposits in Mongolia, Chinese Inner Mongolia, and,
more recently, southern China, have yielded individually rich and
taxonomically diverser lizard assemblages. Here we describe the
remains of a new terrestrial lizard, Asprosaurus bibongriensis gen. et
sp. nov., from the Upper Cretaceous of South Korea. It represents the
first record of a Mesozoic lizard from the Korean Peninsula and,
although incomplete, is exceptional in its very large size. Characters
of the mandible support attribution to crown-group Anguimorpha, with
the closest similarities being to monstersaurs, the group represented
today by the venomous North American Beaded lizard and Gila monster,
genus Heloderma. This group is well-represented in the Upper
Cretaceous fossil record in of eastern Asia, and the remains of large
monstersaurs have been recovered from several dinosaur egg localities,
suggesting dietary preferences similar to those of the living genus.
The new Korean lizard, recovered from the Boseong Bibong-ri Dinosaur
Egg Site, fits the same pattern.


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