Journal
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
Volume 98, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsames.2019.102460
Keywords
Cretaceous vertebrates; Golfo San Jorge Basin; Central Patagonia; Argentina
Categories
Funding
- Winston Churchill Memorial Trust
- Agencia Nacional de Promocion Cientifica y Tecnologica [PICT 2016-0459]
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In this paper, we present an updated revision of fossil vertebrates from the Chubut Group, Golfo San Jorge Basin, while also describing some new remains. Extensive exposures of both Lower and Upper Cretaceous sedimentary sequences are present in central Patagonia. These outcrops have, over the past several decades, yielded a varied vertebrate fauna, including fishes, turtles, crocodyliforms, pterosaurs, and dinosaurs, currently herein characterized and described. Although vertebrate diversity in the Chubut Group in central Patagonia is remarkable, the most abundant vertebrates recovered are dinosaurs. The Matasiete Formation (Hauterivian?-Albian) is markedly less prolific in terms of fossils discoveries than either the Bajo Barreal Formation (Cenomanian-early Turonian) or the recently recognized Lago Colhue Huapi Formation (Coniacian-Maastrichtian). The Bajo Barreal fauna is, at a high level, typical of coeval Gondwanan faunas. However, interestingly, several taxa occupy a basal position within their respective groups. The Lago Colhue Huapi Formation has produced a more derived vertebrate fauna, again similar to those from other Gondwanan regions. Finally, in a broad context, the new materials described augment our understanding of Cretaceous terrestrial vertebrate assemblage of central Patagonia and add to the generally meager record of vertebrate in the Cretaceous of the Southern Hemisphere.
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