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New titanosaurid sauropod: Panamericansaurus



Jorge O. Calvo & Juan D. Porfiri. 2010. Panamericansaurus schroederi
gen. nov. sp. nov. Un nuevo Sauropoda (Titanosauridae-Aeolosaurini) de
la Provincia del Neuquén, Cretácico Superior de Patagonia, Argentina.
Brazilian Geographical Journal: Geosciences and Humanities research
medium, 1(1), 100-115.

Available as free pdf file here:
http://www.seer.ufu.br/index.php/braziliangeojournal/article/view/8170

ABSTRACT - PANAMERICANSAURUS SCHROEDERI GEN. NOV. SP. NOV. NEW
SAUROPODA (TITANOSAURIDAE-AEOLOSAURINI) FROM NEUQUÉN PROVINCE, UPPER
CREACEOUS, PATAGONIA, ARGENTINA. A new sauropod Titanosauridae,
Panamericansaurus schroederi from the Allen Formation (Campanian),
Neuquén province is reported here. The holotype was found in Late
Campanian outcrops of NW Patagonia, Argentina. This new taxon is
deeply nested within a South American Titanosaurid, named
Aeolosaurini. Within Aeolosaurins, it shares all synapomorphic
characters except that the anterior margin in anterior and middle
caudals is not directed anterodorsally; this morphology is also
present in A. colhuehuapensis. P. schroederi is unique in presenting
on mid-posterior caudal vertebrae, prezigapophysis directed
anterodorsaly with the length equal to or shortended than the length
of ventral centrum, postzigapophysis are placed in the middle of the
ventral centrum; the spinoprezigapophyseal lamina expanded
dorsoventrally in middle caudals and the robust index of humerus is
less than 0,40 different to other Aeolosaurins. It is the first record
of a dinosaur at Allen Formation in Neuquen province.

KEY WORDS: Allen Formation, Titanosauridae, Neuquén, Panamericansaurus.

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Jose Ignacio Ruiz-Omenaca
Museo del Jurasico de Asturias (MUJA)
E-33328 Colunga, Spain
www.dinoastur.com
www.museojurasicoasturias.com
www.aragosaurus.com
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