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[dinosaur] Isaberrysaura, new primitive neornithischian from Jurassic of Argentina (free pdf)




Ben Creisler
bcreisler@gmail.com

A new paper:


Isaberrysaura mollensis gen. et sp. nov.

Leonardo Salgado, José I. Canudo, Alberto C. Garrido, Miguel Moreno-Azanza, Leandro C. A. Martínez, Rodolfo A. Coria & José M. Gasca (2017)
A new primitive Neornithischian dinosaur from the Jurassic of Patagonia with gut contents.
Scientific Reports 7, Article number: 42778
doi:10.1038/srep42778
http://www.nature.com/articles/srep42778



We describe a new species of an ornithischian dinosaur, Isaberrysaura mollensis gen. et sp. nov. The specimen, consisting in an almost complete skull and incomplete postcranium was collected from the marine-deltaic deposits of the Los Molles Formation (Toarcian-Bajocian), being the first reported dinosaur for this unit, one of the oldest from Neuquén Basin, and the first neornithischian dinosaur known from the Jurassic of South America. Despite showing a general stegosaurian appearance, the extensive phylogenetic analysis carried out depicts Isaberrysaura mollensis gen. et sp. nov. as a basal ornithopod, suggesting that both Thyreophora and neornithischians could have achieved significant convergent features. The specimen was preserved articulated and with some of its gut content place in the middle-posterior part of the thoracic cavity. Such stomach content was identified as seeds, most of them belonging to the Cycadales group. This finding reveals a possible and unexpected role of this ornithischian species as seed-dispersal agent.

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In Spanish

http://www.lainformacion.com/ciencia-y-tecnologia/ciencias-naturales/paleontologia/Descubren-contenido-estomacal-dinosaurio-millones_0_1000101169.html