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New sauropod paper
My apologies if this has already been posted. I haven't seen or read this
paper yet. I find the abstract tantalizing, given that it suggests the
coexistence of two sauropods in Brazil, one of which is related to
_Rayososaurus_ (a rebbachisaurid), whereas the other is related to
_"Rebbachisaurus" tamesnensis_. AFAIK, the latter is a more primitive grade
of sauropod, akin to _Jobaria_.
Medeiros, M.A. and Schultz, C.L. (2004). _Rayososaurus_ (Sauropoda,
Diplodocoidea) no meso-Cretaceo do norte-nordeste Brasileiro.
[_Rayososaurus_ (Sauropoda, Diplodocoidea) in the mid-Cretaceous of
northeastern Brazil.] Revista Brasileira de Paleontologia. 7(2): 275-279.
Abstract: "Continental Cenomanian deposits of the Alcantara Formation at
Maranhao state, Northeastern Brazil, include a paleocommunity assembling
plants, dinosaurs, crocodiles, and fishes. Isolated teeth and bone debris,
mainly caudal vertebral centra, are the most common identifiable elements.
Comparison with an articulated, almost complete, skeleton from Neuquen in
Argentinean Patagonia, and with published data revealed that most of the
caudal centra from Alcantara Formation are related to _Rayososaurus
tessonei_ (= _Rebbachisaurus tessonei_). Some of them also show similarity
with "_Rebbachisaurus tamesnensis_" centra from North Africa. Although the
confuse taxonomic status of these taxa precludes an accurate identification
for the Brazilian form, this occurrence adds a link among the middle
Cretaceous dinosaurian fauna from Patagonia, Northeastern Brazil and