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Paurodon (Cladotheria) ontogeny and phylogeny, from Upper Jurassic Morrison Formation (free pdf)



Ben Creisler
bcreisler@gmail.com

A recent paper not yet mentioned:

A.O. Averianov and T. Martin (2015)
Ontogeny and taxonomy of Paurodon valens (Mammalia, Cladotheria) from
the Upper Jurassic Morrison Formation of USA.
Proceedings of the Zoological Institute 319 (3): 326-340

Free pdf:
http://www.zin.ru/journals/trudyzin/doc/vol_319_3/TZ_319_3_Averyanov.pdf



Several basal cladotherian taxa previously referred to the
“Paurodontidae” (Dryolestida) from the Upper Jurassic Morrison
Formation of Wyoming, U.S.A. represent ontogenetic and individual
variation of one single taxon, Paurodon valens Marsh, 1887 (=
Archaeotrigon brevimaxillus Simpson, 1927, syn. n.; = Pelicopsis
dubius Simpson, 1927, syn. n.; = Archaeotrigon distagmus Simpson,
1929, syn. n.; = Araeodon intermissus Simpson, 1937, syn. n.; =
Foxraptor atrox Bakker et Carpenter, 1990, syn. n.). P. valens is
characterized by prolonged dental replacement, including late eruption
of m4 (and m5 as individual variation) and a time gap between shedding
of dp2 and eruption of p2, which can be lost in aged individuals. By a
shortened dentary and mandibular symphysis, two-three simple
premolariform teeth, and four molariform teeth with tall trigonid and
small talonid, P. valens is strinkingly similar to the modern golden
moles (Chrysochloridae), particularly to Amblysomus hottentotus. This
similarity suggests that P. valens was specialized on consuming earth
worms in contrast to a more insectivorous diet characteristic for
other dryolestidans.