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Endothiodon (dicynodont) described from Permian of Brazil



From: Ben Creisler
bcreisler@gmail.com

A new online paper:

Alessandra D. S. Boos, Cesar L. Schultz, Cristina S. Vega & Juarês J.
Aumond (2013)
On the presence of the Late Permian dicynodont Endothiodon in Brazil.
Palaeontology (advance online publication)
DOI: 10.1111/pala.12020
http://onlinelibrary.wiley.com/doi/10.1111/pala.12020/abstract

The first dicynodont reported for the Permian of South America is
described in detail here. The specimen consists of a partial skull and
associated lower jaws, collected from the Serra do Cadeado locality,
Rio do Rasto Formation, Brazil. The specimen was assigned to the genus
Endothiodon Owen in a preliminarily description published in the
1970s. This identification implied a direct correlation with some of
the well-established biozones of the Beaufort Group, South Africa,
where this taxon is known to occur. Although badly weathered, the
Brazilian material preserves several features that allow us to confirm
its assignment to Endothiodon, such as the pineal foramen situated on
a boss, the bulbous swellings of the dentaries, a boss situated on the
ventral margin of the jugal, the extensive number of dentary teeth and
the upturned pointed beak of the lower jaw. However, this set of
characters is not enough to establish a specific taxonomic assignment
for the specimen, although it seems to be more closely related to E.
bathystoma, E. uniseries and E. whaitsi than to E. mahalanobisi. The
biostratigraphical correlations proposed for the tetrapod faunas of
the Rio do Rasto Formation highlight the similarities between these
associations and others from the Mid and Late Permian of South Africa
and Eastern Europe. However, until now, these correlations are
tentative because only a few faunal elements have been recovered from
Brazil, and most of them lack stratigraphic data on the levels from
where they were collected. Due to the presence of Endothiodon, at
least part of the Rio do Rasto Formation can be correlated with
deposits in India, Malawi, Mozambique, South Africa, Tanzania, Zambia
and Zimbabwe.