Upper Jurassic Period
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Sordes Pilosus

Sordes (demon or devil) pilosus (Hairy)
Two near complete specimens from the Upper Jurassic sediments of Kazakhstan.  These specimens show soft tissue preservation and indicate the presence of body hair.  Recently, the overall hairy nature of these fossils has partly been attributed to preservation of fragmented wing membrane fibres, giving a better understanding of the pterosaur wing structure.

Sharov, A. G. 1971, Novyiye lyetayushchiye reptili iz myezozoya Kazakhstana i Kirgizii. [New flying reptiles from the Mesozoic of Kazakhstan and Kirghizia.] Trudy paleont. Inst. Moscow 130, 104–113.  Russian text with end plates.

Bakhurina N. N. & Unwin D. M.; 1995, The evidence for "hair" in Sordes and other pterosaurs. J. Vert. Paleont. 15(3, Suppl.): 17A

Unwin, D. M. & Bakhurina, N. N. 1997, The significance of soft tissue preservation for understanding the palaeobiology of pterosaurs. J. Morph. 232, 333