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Giant Mosasaurus from Russia (free pdf)



Ben Creisler
bcreisler@gmail.com


A new paper in open access:

D.V. Grigoriev (2014)
Giant Mosasaurus hoffmanni (Squamata, Mosasauridae) from the Late
Cretaceous (Maastrichtian) of Penza, Russia.
Proceedings of the Zoological Institute RAS 318 (2): 148-167
http://www.zin.ru/journals/trudyzin/doc/vol_318_2/TZ_318_2_Grigoriev.pdf


This study provides a morphological description of the fragmentary
skull of a mosasaur discovered in 1927 in the Upper Cretaceous
(Maastrichtian) deposits in the city of Penza (Russia). Some bones
from the original material had been lost since their discovery; their
description is based on plaster casts. The Penza mosasaur displays
characteristic features of Mosasaurus hoffmanni such as the posterior
carina that shifts from a somewhat lateral position in the anterior
teeth to a posterior position further along the tooth row, a frontal
with convex lateral margins, and a powerfully built dentary. This is
the first unequivocal record of this taxon from Russia. M. hoffmanni
from the Penza is one of the largest mosasaurs ever known with an
overall length of the body about 17 m.