Osteological features of Middle Jurassic Pterosaurs from Patagonia (Argentina).

CODORNIÚ, L.S.; RAUHUT, O.W.; POL, D.

Beijing

Simposio; International Ptersaur Symposium; 2010

The Cañadon Asfalto Formation is mainly com- posed of lacustrine deposits and has provided the most diverse vertebrate fauna known for the Middle Jurassic in the Southern Hemisphere. Pterosaur remains have been discovered from several localities in this unit and briefly reported by Rauhut et al. (2001) and Unwin et al. (2004). Here we present further information on these remains that include abundant and three dimen- sionally preserved cranial and postcranial material of several individuals found closely associated in a single locality (Figures 1 and 2), as well as two humeri and a scapulacoracoid found in the same horizon but 22 me- ters away. The pterosaur specimens are preserved in a silicified limestone, associated with stromatolite fragments, probably representing a tempestite deposit.