Upper Jurassic Period
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Laopteryx priscum

 

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Laopteryx (stone wing)
Originally classified as a bird by Marsh in 1881, Laopteryx was re-examined by Ostrom and re-classified as a pterosaur in 1986.  The fossil which was found at Como Bluff, Wyoming, USA, is a partial skull of a medium size pterosaur which is too incomplete to identify to the family level.

Holotype: YPM 1800  Posterior skull and braincase with associated tooth.

Marsh, O. C., 1881, Discovery of a fossil bird in the Jurassic of Wyoming. Am. J. Sci. (3) 21, 341–342.

Ostrom, J. H., 1986, The Jurassic ‘bird’ Laopteryx priscus re-examined. Contrib. geol. Spec. Pap. 3, 11–19.