New pterosaur tracks from the Hasandong Formation (Lower Cretaceous) of Hadong County, South Korea
New pterosaur tracks from the Hasandong Formation (Lower Cretaceous) of Hadong County, South Korea
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DOI：
10.1016/j.cretres.2007.05.004
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发表时间：
2008-04-01
影响因子：
2.1
通讯作者：
Kobayashi, Yoshitsugu
中科院分区：
文献类型：
--
作者：
Lee, Yuong-Nam;Lee, Hang-Jae;Kobayashi, Yoshitsugu
2004年，在韩国下山洞组（下白垩统）发现了50个新的翼龙足迹。它们以天然铸件的形式保存在一个孤立的深灰色泥岩块（70 x 50 厘米）的表面上。 Manus 和pes 印记非常小，平均长分别为25.6 毫米和25.7 毫米。手印（N = 25）是三指，数字 1、11、Ill 是强烈不对称的。完全跖行足印记（N = 25）是由细长跖骨留下的，具有短的四趾（趾与整个足长度的比率为2.6）。没有佩斯第五方阵的踪迹。由于这些特征清楚地将 Hadong 足迹与 ichnogenus Pteraichnus 的模式种区分开来，我们将它们分配给一个新种，即 Pteraichnus koreanensis。它们是韩国地层上最古老的翼龙足迹，在大小和形态上与两种翼龙龙类（Haenamichnus uhangriensis 和 Pteraichnus isp.）区别开来，这两种翼龙之前曾在 Uhangri 和 Haman 地层报道过。朝鲜翼龙 (Pteraichnus koreanensis) 是目前亚洲报道的最小的翼龙足迹。 (c) 2007 Elsevier Ltd。保留所有权利。
In 2004, fifty new pterosaur tracks were discovered in the Hasandong Formation (Lower Cretaceous), South Korea. They are preserved as natural casts on the surface of an isolated dark grey mudstone block (70 x 50 cm). Manus and pes imprints are very small, averaging 25.6 mm and 25.7 mm long, respectively. The manus imprints (N = 25) are tridactyl and digit 1, 11, Ill are strongly asymmetric. Fully plantigrade pes imprints (N = 25) were left by elongate metatarsals with short four digits (the ratio of digit to whole pes length is 2.6). There is no trace of the 5th phalanx of the pes. As these features clearly distinguish the Hadong tracks from the type species of the ichnogenus Pteraichnus, we assign them to a new species, Pteraichnus koreanensis. They are stratigraphically the oldest pterosaur tracks in Korea and are distinguished by size and morphology from the two pterosaur ichnotaxa, Haenamichnus uhangriensis and Pteraichnus isp., previously reported from the Uhangri and Haman formations. Pteraichnus koreanensis is the smallest pterosaur track currently reported from Asia. (c) 2007 Elsevier Ltd. All fights reserved.