New didactyl dinosaur footprints (Dromaeosauripus hamanensis ichnogen. et ichnosp. nov.) from the Early Cretaceous Haman Formation, south coast of Korea
作者： Jeong Yul Kim , Kyung Soo Kim , Martin G. Lockley , Seong Young Yang , Seung Jo Seo
DOI: 10.1016/J.PALAEO.2008.02.003
关键词: Body size 、 Paleoecology 、 Geology 、 Paleontology 、 Trackway 、 Stride length 、 Cretaceous
摘要: Abstract Didactyl dinosaur footprints in fine-grained sandstone of the Early Cretaceous Haman Formation, Namhae area, Korea are herein described. The tracks ~ 15 cm long and ~ 9.0 cm wide consist only impressions digits III IV, which show well-developed pad impressions. Digit narrow (about 2.0 cm), terminate sharp claw traces. Trackway width is very narrow, about 10.0 cm. Step length 92 cm stride 185 cm. Pace angulation 180°, i.e., consecutive nearly a straight line. thought to have been made by dromaeosaurid characterized strongly recurved, pes digit II that did not register on substrate. didactyl trackway attributed small (Deinonychosauria) running bipedally with speed 17.5 km/h lake margin. tracks, described as Dromaeosauripus hamanensis ichnogen. et ichnosp. nov. represent fourth convincing record attributable member Deinonychosauria world, first Korea. report also provides significant information hip height, body size, foot morphology, walking or speed, paleoecology, paleogeography dromaeosaurids flourished during northeast Asia.
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