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Pampadromaeus (was New sauropodomorph from Triassic of Brazil)



From:  Ben Creisler
bh480@scn.org

Many thanks to Bill Parker of Chinleana and Stephen Poropat for forwarding
the pdf. Also a tip of the hat to other DML members who sent me the name.


Pampadromaeus Cabreira, Schultz, Bittencourt, Soares, Fortier, Silva and
Langer, 2011*
*Provided this is officially published in the December issue of
Naturwissenschaften 

Dinosauria Owen 1842 sensu Padian and May (1993)

Saurischia Seeley 1887 sensu Gauthier (1986)

Eusaurischia Padian, Hutchinson & Holtz 1999 sensu Langer (2004)

stem-Sauropodomorpha Huene 1932 sensu Salgado et al. (1997; see Langer 2003)

Pampadromaeus barberenai new genus and species

Etymology:  The generic name is derived from the Quechua word pampa (=
plain), in reference to the grassland landscape that covers parts of Rio
Grande do Sul, and dromaeus, variant of Greek dromeus (=runner), in
reference to the probable cursoriality of the animal. The specific epithet
honors the Brazilian palaeontologist Mário C. Barberena.

The animal's length as reconstructed would be about 1.22 m.
====


Sergio F. Cabreira, Cesar L. Schultz, Jonathas S. Bittencourt, Marina B.
Soares, Daniel C. Fortier, Lúcio R. Silva and Max C. Langer (2011)
New stem-sauropodomorph (Dinosauria, Saurischia) from the Triassic of
Brazil. 
Naturwissenschaften 
DOI: 10.1007/s00114-011-0858-0
http://www.springerlink.com/content/qu44p67746t71w38/

Post-Triassic theropod, sauropodomorph, and ornithischian dinosaurs are
readily recognized based on the set of traits that typically characterize
each of these groups. On the contrary, most of the early members of those
lineages lack such specializations, but share a range of generalized traits
also seen in more basal dinosauromorphs. Here, we report on a new Late
Triassic dinosaur from the Santa Maria Formation of Rio Grande do Sul,
southern Brazil. The specimen comprises the disarticulated partial skeleton
of a single individual, including most of the skull bones. Based on four
phylogenetic analyses, the new dinosaur fits consistently on the
sauropodomorph stem, but lacks several typical features of sauropodomorphs,
showing dinosaur plesiomorphies together with some neotheropod traits. This
is not an exception among basal dinosaurs, the early radiation of which is
characterized by a mosaic pattern of character acquisition, resulting in
the uncertain phylogenetic placement of various early members of the group. 




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