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Re: Mapusaurus roseae & Antarctopelta oliveroi
To stop people from going crazy, and to partially stop the tide of emails i've
been getting in the
last 5 hours: HERE ARE THE PDF LINKS.
Salgado L. & Gasparini Z. 2006. ? Reappraisal of an ankylosaurian dinosaur from
Cretaceous of James Ross Island (Antarctica). Geodiversitas 28 (1) : 119-135.
The holotype of the upper Campanian ankylosaur Antarctopelta oliveroi n. gen.,
n. sp., from James
Ross Island, Antarctica, is described. Diagnostic characters include short
length about 70% of the centrum height), distal caudal vertebrae with
transverse processes well
developed (centrum width including the transverse processes exceeds 30% of the
articulation width) and dorsoventrally depressed, and the presence of smooth,
osteoderms, surrounded by a mosaic of smaller polygonal osteoderms with a
rugose surface texture
and tiny, button-like ossicles. While a number of features, such as relatively
large teeth with
respect to the mandible and the presence of an asymmetrical cingulum, suggest
an affinity with the
Nodosauridae, others such as the dorsoventrally depressed morphology of the
vertebrae and, especially, the presence of ossified tendons on their ventral
the Ankylosauridae. This uncertainty impedes evaluation of the
of this new species of dinosaur.
Coria R. A. & Currie P. J. 2006. ? A new carcharodontosaurid (Dinosauria,
Theropoda) from the
Upper Cretaceous of Argentina. Geodiversitas 28 (1) : 71-118.
A new carcharodontosaurid theropod from the Huincul Formation
Cretaceous) of Neuquén Province, Argentina, is described. Approximately the
same size as
Giganotosaurus carolinii Coria & Salgado, 1995, Mapusaurus roseae n. gen., n.
sp. is characterized
by many features including a deep, short and narrow skull with relatively large
relatively small maxillary fenestra, and narrow, unfused rugose nasals.
Mapusaurus roseae n. gen.,
n. sp. has cervical neural spines and distally tapering epipophyses, tall
dorsal neural spines,
central pleurocoels as far back as the first sacral vertebra, accessory caudal
stout humerus with poorly defined distal condyles, fused metacarpals, ilium
with brevis fossa
extending deeply into
ischial peduncle, and femur with low fourth trochanter. Phylogenetic analysis
Mapusaurus n. gen. shares with Carcharodontosaurus Stromer, 1931 and
Giganotosaurus Coria &
Salgado, 1995 several derived features that include narrow blade-like teeth
with wrinkled enamel,
heavily sculptured facial bones, supraorbital shelf formed by a
postorbital/palpebral complex, and
a dorsomedially directed femoral head. Remains of Mapusaurus n. gen. were
recovered from a bonebed
where 100% of the identifiable dinosaur bones can be assigned to this new
genus. Based on the
metatarsals recovered, a minimum of seven individuals was buried at the site.
It is conceivable
that this bonebed represents a long term or coincidental accumulation of
carcasses. The presence
of a single carnivorous taxon with individuals of different ontogenic stages
provides evidence of
variation within a single population, and may also indicate some behavioural
traits for Mapusaurus
roseae n. gen., n. sp.
--- Nick Pharris <firstname.lastname@example.org> wrote:
> Quoting Jay <email@example.com>:
> > Mapusaurus
> > Coria R. A. & Currie P. J. 2006. ? A new carcharodontosaurid
> > (Dinosauria, Theropoda) from the
> > Upper Cretaceous of Argentina. Geodiversitas 28 (1) : 71-118.
> > Antarctopelta
> > Salgado L. & Gasparini Z. 2006. ? Reappraisal of an ankylosaurian
> > dinosaur from the Upper
> > Cretaceous of James Ross Island (Antarctica). Geodiversitas 28 (1) :
> > 119-135.
> Argh! Geodiversitas is one of the relatively few journals U of M
> doesn't get in electronic format. Does any kind soul out there have
> Nick Pharris
> Department of Linguistics
> University of Michigan
> "Creativity is the sudden cessation of stupidity."
> --Edwin H. Land
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