Upper Jurassic Period

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Herbstosaurus pigmaeus

 

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Herbstosaurus (Herbst's lizard) pigmaeus (small)
A specimen of a small pterosaur of Middle Jurassic Callovian age from North Patagonia, Argentina.  The bones are distinctly pterodactyloid, though they were first described as a small theropod.

Casamiquela, R. M. 1975, Herbstosaurus pigmaeus (Coeluria, Compsognathidae) n. gen. n. sp. del Jurasico medio del Nequéri (Patagonia septentrionali). Uno de los mas pequenos dinosaurios conocidos. Acta primero Congreso Argentino Paleontologia et Biostratigrafia vol. 2, pp. 87–102.