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A nearly complete ornithocheirid pterosaur from the Aptian (Early Cretaceous) Crato Formation of NE Brazil

100%

Elgin R. A., Frey E.

Acta Palaeontologica Polonica

2012

tom 57

nr 1

A partial ornithocheirid, representing a rare example of a pterosaurian body fossil from the Nova Olinda Member of the Crato Formation, NE Brazil, is described from the collections of the State Museum of Natural History, Karlsruhe. While similar in preservation and taphonomy to Arthurdactylus conandoylei, it is distinguished by slight differences in biometric ratios, but the absence of a skull prevents closer identification. Mostly complete body fossils belonging to ornithocheiroid pterosaurs appear to be relatively more abundant in the younger Romualdo Member of the Santana Formation, making the described specimen one of only two well documented ornithocheiroids known from the Nova Olinda Lagerstätte.

A second Cretaceous ornithuromorph bird from the Changma Basin, Gansu Province, northwestern China

80%

You H.-L., Atterholt J., O'Connor J. K., Harris J. D., Lamanna M. C., Li D.-Q.

Acta Palaeontologica Polonica

2010

tom 55

nr 4

Finely−bedded lacustrine deposits of the Aptian (Lower Cretaceous) Xiagou Formation exposed in the Changma Basin of Gansu Province, northwestern China, have yielded numerous fossil vertebrate remains, including approximately 100 avian specimens. Though the majority of these birds appear referable to the ornithuromorph Gansus yumenensis, a number of enantiornithine fossils have also been recovered. Here we report on a specimen consisting of a complete, three−dimensionally preserved sternum, furcula, and sternal ribs that represents a second ornithuromorph taxon from the Xiagou Formation at Changma. The fossil exhibits morphologies that distinguish it from all previously−known Xiagou birds and demonstrate that it represents a derived non−ornithurine member of Ornithuromorpha. Though it is morphologically distinct from the equivalent elements of all other described ornithuromorphs, the material is too incomplete to justify the erection of a new taxon. Nonetheless, it increases the taxonomic diversity of the Xiagou avifauna, thereby expanding our knowledge of Early Cretaceous avian diversity and evolution.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Atterholt J.

1 Elgin R. A.

1 Frey E.

1 Harris J. D.

1 Lamanna M. C.

1 Li D.-Q.

1 O'Connor J. K.

1 You H.-L.

1 2012

1 2010

Wyniki wyszukiwania

A nearly complete ornithocheirid pterosaur from the Aptian (Early Cretaceous) Crato Formation of NE Brazil

A second Cretaceous ornithuromorph bird from the Changma Basin, Gansu Province, northwestern China