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Re: Mojoceratops and venomous Sinornithosaurus



 So is this why so many ball caps are now worn backwards?

Dan



On 7/7/2010 7:16 PM, Tim Williams wrote:
Interesting etymology provided for _Mojoceratops_...


"From 'mojo' (early 20th century African-American English) a magic charm or 
talisman, often used to attract members of the opposite sex (in reference to the 
elaborate frill, which may have functioned in courtship), ceras (Greek) horn, and ops 
(Greek), face."


Hmmm, so that's what 'mojo' means...


Cheers

Tim


--- On Wed, 7/7/10, Ville Sinkkonen<villesink@gmail.com>  wrote:

From: Ville Sinkkonen<villesink@gmail.com>
Subject: Mojoceratops and venomous Sinornithosaurus
To: "dinosaur"<dinosaur@usc.edu>
Received: Wednesday, 7 July, 2010, 2:32 PM
Nicholas R. Longrich. 2010
Mojoceratops perifania, A New Chasmosaurine
Ceratopsid from the Late Campanian of Western Canada.
Journal of
Paleontology 84(4):681-694.


Abstract

A new genus of long-horned chasmosaurine ceratopsid is
described from
the Dinosaur Park Formation (upper Campanian) of Western
Canada.
Mojoceratops perifania is represented by a skull and a
parietal from
the Dinosaur Park Formation of Alberta and an isolated
parietal from
the Dinosaur Park Formation of Saskatchewan. Several other
specimens
are provisionally referred to this taxon. While
Mojoceratops shares
many plesiomorphies with Chasmosaurus, the animal lacks
the
forward-curving parietal epoccipitals and reduced
postorbital horns
that diagnose the genus Chasmosaurus, and it differs from
all other
chasmosaurines in exhibiting a prominent sulcus on the
anterior margin
of the parietal, swellings on the anterodorsal surface of
the parietal
rami, and a small accessory process on the first parietal
epoccipital.
Other unusual features include anteriorly extended parietal
fenestrae,
a broad, heart-shaped frill, and transverse expansion of
the
postfrontal fontanelle. The type material of âEoceratops
canadensisâ
and âChasmosaurus kaiseniâ are nondiagnostic and these
names are
therefore considered nomina dubia, but their morphology is
consistent
with
s.
The frill of
Mojoceratops shows marked variation. Some of this variation
probably
results from intraspecific variation or ontogenetic
changes, but
because the Dinosaur Park Formation encompasses more than a
million
years of time, evolution may explain some of these
differences.
Phylogenetic analysis shows that Mojoceratops forms a clade
with
Agujaceratops mariscalensis; Chasmosaurus is the most basal
member of
Chasmosaurinae.


(I thought we heard last of this venomous Sinornithosaurus
, but I
guess not....)

Federico A. Gianechini, Federico L. AgnolÃn and MartÃn D.
Ezcurra 2010
A reassessment of the purported venom delivery system of
the bird-like
raptor Sinornithosaurus
PalÃontologische Zeitschrift, online first

Abstract
Gong and colleagues recently described unusual traits in
the
dromaeosaurid Sinornithosaurus that were interpreted as the
first
evidence of a venomous dinosaur. This interpretation was
based on
extremely elongated maxillary teeth, morphologically
similar to those
present in poisonous snakes; labial grooves on maxillary
and dentary
tooth crowns; and an additional ornamented depression in
the lateral
surface of the maxillary bone (subfenestral fossa). A
reappraisal of
each of these morphological traits is provided here in
light of
comparisons with other theropod dinosaurs and previous
discussions for
inferring poisonous capabilities in fossil taxa. We fail to
recognize
unambiguous evidence supporting the presence of a venom
delivery
system in Sinornithosaurus. For example, the extremely
elongated teeth
seem to be a taphonomic artifact due to the displacement of
teeth
outside the alveoli; the labial grooves are present in a
wide variety
of theropods; and no strong evidence for the lodging of a
venomous
gland is recognized. In contrast, the cranial and dental
anatomy of
Sinornithosaurus is congruent with that of other
dromaeosaurids. The
weak support for a venomous Sin
osed by Gong and colleagues for this
predatory
dinosaur.

and a response

Enpu Gong,Larry D. Martin, David A. Burnham  and
Amanda R. Falk 2010
Evidence for a venomous Sinornithosaurus
PalÃontologische Zeitschrift, online first

Also a new species of atoposaurid crocodylian

Komsorn Lauprasert, Chalida Laojumpon, Wanitchaphat
Saenphala, Gilles
Cuny,Kumthorn Thirakhupt and Varavudh Suteethorn 2010
Atoposaurid crocodyliforms from the Khorat Group of
Thailand: first
record of Theriosuchus  from Southeast Asia
PalÃontologische Zeitschrift, online first

Abstract
We describe a partial crocodilian skull from the Mesozoic
non-marine
sediments of the Khorat Plateau Sao Khua Formation
(Berriasian-Barremian) in northeastern Thailand and assign
it to
Theriosuchus grandinaris sp. nov. An isolated dentary from
the Phu
Kradung Formation (latest JurassicâEarly Cretaceous) is
also
tentatively assigned to the genus Theriosuchus, and an
isolated tooth
from the Khok Kruat Formation (Aptian-Albian) may belong to
this
genus. The Thai fossils represent the first unambiguous
evidence of
presence of Theriosuchus outside Europe. Its occurrence in
Thailand
increases the known diversity of neosuchian crocodyliforms
from
Southeast Asia and suggests that Atoposauridae had a wide
geographical
distribution from the Late Jurassic to the Early
Cretaceous.

btw if someone has access to those last three papers I
would gladly
recieve a copy.


Cheers

-Ville