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[dinosaur] Tapejarid pterosaur fossil with vertebral column from Crato Formation of Brazil




Ben Creisler
bcreisler@gmail.com

A new paper:

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Xin Cheng, Renan A. M. Bantim, Juliana M. SayÃo, Xinjun Zhang, Shunxing Jiang, Alexander W.A. Kellner, Xiaolin Wang & AntÃnio Ã.F. Saraiva (2020)
Short note on the vertebral column of the Tapejaridae (Pterosauria, Pterodactyloidea) based on a new specimen from the Crato formation (late Aptian, Early Cretaceous), northeast Brazil.
Journal of South American Earth Sciences 102921 (advance online publication)
doi: https://doi.org/10.1016/j.jsames.2020.102921
https://www.sciencedirect.com/science/article/abs/pii/S0895981120304648


Highlights

A new tapejarid specimen from the Crato Formation is described here.
Determining the number of dorsal vertebrae of tapejarid pterosaurs from the Crato Formation.
Proving the number of vertebrae that compose the notarium or its presence at all are various in the Tapejaridae.

Abstract

The Tapejaridae compose a pterodactyloid clade of pterosaurs that is one of the most abundant flying reptiles in the deposits of the Early Cretaceous Crato Formation from the Araripe Basin, northeast Brazil. Until now, only one tapejarid specimen from this locality shows a relatively complete vertebral column. Here we describe a second specimen (LPU 1535) and compare it with more complete tapejarine tapejarids from western Liaoning (China). Among the most striking differences are the absence of a notarium in the Chinese material and the lesser number of dorsal elements in the Brazilian specimens, the latter perhaps being an evolutionary trend in the Tapejarinae. The new material confirms that the number of dorsal elements forming the notarium and taking part in the synsacrum increase during ontogeny. Some member of the Tapejaridae might share the dorsal part of the postacetabular process of ilia extending medially and fusing to the neural spines of the sacral vertebrae, a feature previously observed in the pteranodontid pterodactyloid Pteranodon.

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