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Chinese pareiasaurs (free pdf)



Ben Creisler
bcreisler@gmail.com


A new paper with free pdf link:

Michael J. Benton (2016)
The Chinese pareiasaurs.
Zoological Journal of the Linnean Society (advance online publication)
DOI: 10.1111/zoj.12389
http: // onlinelibrary.wiley.com/doi/10.1111/zoj.12389/abstract

pdf:

http: // palaeo.gly.bris.ac.uk/Benton/reprints/2016pareiasaurs.pdf

Pareiasaurs were important medium- to large-sized herbivores in the
Middle and Late Permian, some 268–252 Ma. They are best known from
abundant remains of several taxa found in South Africa and Russia,
with isolated finds from other parts of the world. Six genera and
species of pareiasaurs have been described from China, and yet they
have not been reviewed. Of these six, Tsiyuania may be a synonym of
Honania, but this taxon is not further considered here. The other
four, which were named for separate finds from the Sunjiagou Formation
(Changhsingian, 254–252 Ma), show considerable similarities. Despite
earlier suggestions, there are no convincing anatomical characters to
distinguish Shihtienfenia, Shansisaurus, and Huanghesaurus, and these
three genera are synonymized as Shihtienfenia permica Young & Yeh,
1963. The fourth taxon, Sanchuansaurus pygmaeus Gao, 1989, shows
distinctly different teeth from those of Huanghesaurus (=
Shihtienfenia), and was about one-third of the size, so it is retained
as a second valid pareiasaur from the Chinese latest Permian.
Phylogenetic analysis confirms the validity of these two taxa, with
Sanchuansaurus belonging among the derived forms, close to Elginiidae,
and with Shihtienfenia associated with Pumiliopareiasauria and
Pareiasuchus.


News:

http: // phys.org/news/2016-02-ugliest-fossil-reptiles-roamed-china.html