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Harpactognathus
''Harpactognathus'' (meaning "seizing/grasping jaw") was a genus of pterosaur found in the Late Jurassic-age Morrison Formation of Albany County, Wyoming, USA. It is based on NAMAL 101, a partial skull consisting of the snout, recovered from near Bone Cabin Quarry in 1996. The species name honors the discoverer, Joe Gentry, a volunteer for the Western Paleontological Laboratories, in Lehi, Utah.〔Carpenter, K., Unwin, D.M., Cloward, K., Miles, C.A., and Miles, C. (2003). A new scaphognathine pterosaur from the Upper Jurassic Formation of Wyoming, USA. In: Buffetaut, E., and Mazin, J.- M. (eds.). ''Evolution and Palaeobiology of Pterosaurs.'' Geological Society of London, Special Publications 217:45-54.〕
Its describers found it to be most similar to ''Scaphognathus'' among pterosaurs, albeit substantially larger (estimated skull length of 280-300 mm (11-12 in), estimated wingspan of at least 2.5 m (8.2 ft)). Because of the similarity, ''Harpactognathus'' was assigned to the subfamily Scaphognathinae of the family Rhamphorhynchidae. This genus is also notable for having a low bony crest running all the way to the tip of the beak (pterosaur bone crests usually do not reach the tip) and for being the oldest known Morrison Formation pterosaur, having been found in the Salt Wash Member (Kimmeridgian).〔
==Paleobiology==
As a rhamphorhynchid, ''Harpactognathus'' would have been an aerial predator of small prey; the authors hypothesized that scaphognathines specialized in inland freshwater habitats.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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