[N] 2006 New Petrosaur tracks from the Hasandong Formation, South Korea
Lee, Y-N. & Lee, J-J. (2006) New Petrosaur tracks from the Hasandong Formation (Lower Cretaceous) of Hadong County, South Korea. JVP 26(3) Abstracts pp.89
New pterosaur tracks were discovered in the Hasandong Formation (Aptian) at an abandoned quarry of Hadong County in 2004. A total of 50 pterosaur footprints are preserved as natural casts on a big black shale slab (70 x 50 cm). Footprints consist of isolated 25 manus and 25 pes prints, indicating the quadrupedal locomotion. The average manus length and width are 25.6 mm and 12.3 mm, respectively. The manus prints are asymmetric, with three digit imprints. The first digit imprint is anterolaterally oriented and is the shortest. The second and third digit imprints are posterolaterally orientated. The average pes length and width are 25.7 mm and 12.8 mm, respectively. The pes prints are triangular, elongate and fully plantigrade. They are tetradactyl with anterior claw marks. The first digit impression (average 8.9 mm) is shorter than digits II-IV, subequal in length. The metatarsals are long and elongate which are always longer than digits. It is difficult to trace complete trackways due to lack of consecutive manus-pes footprints. Nevertheless, in a complete manus-pes set, the pes print is anterior to the manus print and the latter is located further from the mid-line than the former. Hadong pterosaur tracks are distinguished from Haenamichnus uhangriensis reported in the Uhangri Formation (Upper Cretaceous) of Haenam County, Korea in terms of the size and morphology