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Rayososaurus (Sauropoda, Diplodocoidea) no meso-cretáceo do norte-nordeste brasileiro

Authors: Medeiros, Manuel Alfredo Araujo; Schultz, Cesar Leandro;

Rayososaurus (Sauropoda, Diplodocoidea) no meso-cretáceo do norte-nordeste brasileiro

Abstract

Os depósitos continentais cenomanianos da Formação Alcântara no Estado do Maranhão, Nordeste do Brasil, incluem uma paleocomunidade reunindo plantas, dinossauros, crocodilos e peixes. Dentes isolados e fragmentos ósseos, principalmente centros vertebrais caudais, são os elementos mais comumente identificáveis. A comparação com um esqueleto articulado, quase completo de Neuquén na Patagônia argentina, e com dados publicados revelou que grande parte dos centros vertebrais caudais provenientes da Formação Alcântara estão relacionados a Rayososaurus tessonei (= Rebbachisaurus tessonei). Alguns destes centros também mostram similaridades com centros de “Rebbachisaurus tamesnensis” da África do norte. Apesar do confuso status taxonômico destas formas impedir uma identificação específica para a forma brasileira, esta ocorrência estabelece mais um elo entre as faunas dinossaurianas da Patagônia, do Nordeste brasileiro e do Saara.

Continental Cenomanian deposits of the Alcântara Formation at Maranhão 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 Neuquén in Argentinean Patagonia, and with published data revealed that most of the caudal centra from Alcântara 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 Sahara.

Keywords

Alcântara formation, Rayososaurus, Cenomanian, Paleovertebrados, Cretaceous

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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