New pterosaur tracks (Pteraichnidae) From the Late Cretaceous Uhangri

New pterosaur tracks (Pteraichnidae) From the Late Cretaceous Uhangri Formation

 

제    목	New pterosaur tracks (Pteraichnidae) From the Late Cretaceous Uhangri Formation
학 회 지	대한지질학회, 대한자원환경지질학회, 한국석유지질학회, 한국암석학회	저     자	황구근, 허민, Martin G. Lockley, Joanna L. Wright, David M. Unwin, 백인성
년    도	2001	권  /  호	/	쪽	83~
연구수행기관	전남대, University of Colorado, 부경대	원문형태	PDF파일다운로드
키 워 드	New pterosaur tracks (Pteraichnidae), Late Cretaceous Uhangri Formation, dinosaurs

 

 

 

Numerous footprints of dinosaurs, pterosaurs and birds, together with arthropod tracks, have been discovered in the upper Cretaceous Uhangri Formation which outcrops along the south-western coastline of South Korea. This ichnofauna contains the first pterosaur tracks reported from Asia. The digitigrade tridactyl manus impressions exhibit features of a typical pterosaur hand print. The pes impressions, however, show features that are different from pterosaur footprints reported previously: there is no visible trace of impressions of individual digits, and the toes are triangular or rounded in shape distally without distinct claw impressions. As these features clearly distinguish the Uhangri tracks from Pteraichnus and Purbeckopus, we assign them to a new ichno-genus, Haenamichnus which accommodates the new ichno-ichnospecies, Haenamichnus uhangriensis. The prints are five to six times lager than those of Pteraichnus, and are currently the largest pterosaur tracks known. They show virtually no trace of the fifth phalange of the pes, thus they are likely to have been made by pterodactyloids, moreover, features of the tracks suggest that they can be attributed to azhdarchids, the commonest pterosaur of the Late Cretaceous. The longest pterosaur trackway yet known from any track site (length 7.3 m) and consisting of 14 pairs of foot impression, was also found in the Uhangri Formation and suggests that pterosaurs were competent terrestrial locomotors.