This is the first report of the webbed bird tracks from the middle part of the Jinju Formation (Lower Cretaceous: upper Aptian–lower Albian) in Bito Island, Seopo-myeon, Sacheon City, Gyeongnam, South Korea. Although it is well known that the avian tracks are very abundant and diverse in the Cretaceous Hayang and Yucheon groups of the Gyeongsang Supergroup, bird tracks of the Sindong Group have never been reported. The bird tracks, which are comparatively small (about 3.5 cm length excluding hallux), tetradactyl with a functional reversed hallux, asymmetric and semi-palmate webbing in the hypex between digits II–III and III–IV and are characterized by narrow divarication angle (about 79.8°) between digits II and IV, are described herein as a new ichnotaxon, Ignotornis seoungjoseoi ichnosp. nov. Left and right footprints set showing standing traces is well preserved on the track surface. Tracks of Jindongornipes ichnosp. were also recovered from the intertidal zone of Bito Island, and is the first report of this ichnogenus from the Jinju Formation on Bito Island. The discovery of two ichnotaxa of bird tracks from the Jinju Formation demonstrates that bird diversity from the Lower Cretaceous (upper Aptian–lower Albian) to Upper Cretaceous (Maastrichtian) track record, and the record of terrestrial vertebrate diversity from the Cretaceous Period of Korea, is still in the process of being fully documented and understood.

这是韩国庆南市泗川市西浦面美托岛晋州组中部（下白垩统：上阿普天-下阿尔比安）的蹼状鸟迹的首次报道。虽然众所周知，庆尚超群的白垩纪河阳群和雨川群的鸟类踪迹非常丰富多样，但从未报道过新东群的鸟类踪迹。鸟类的足迹相对较小（不包括拇趾长约 3.5 厘米），具有功能性反向拇趾的四指，在指尖 II-III 和 III-IV 之间的顶点处不对称和半掌状织带，其特征是分叉角狭窄（大约 79.8°）在数字 II 和 IV 之间，在本文中被描述为一种新的 ichnotaxon，Ignotornis seoungjoseoi奇诺斯普。十一月 显示站立痕迹的左右脚印设置在轨道表面上保存完好。的曲目Jindongornipes ichnosp。在鼻头岛的潮间带也发现了这种鱼，是鼻头岛晋州组这种鱼属的首次报道。在晋州组发现了两条鸟类踪迹，证明了从下白垩世（上阿普蒂安-下阿尔比安）到上白垩世（马斯特里赫特）的鸟类多样性记录，以及韩国白垩纪的陆生脊椎动物多样性记录，仍处于完整记录和理解的过程中。