A new dinosaur tracksite with footprints of non-adult ornithopods was discovered from the Lower Cretaceous Haman Formation (Albian), Gunbuk District, Haman County, South Gyeongsang Province of South Korea in 2018. The tracksite consists of 58 ornithopod footprints (seven short trackways and 26 isolated footprints) within three track-bearing horizons partially exposed on the small creek bottom. Lithofacies and sedimentary structures of the track-bearing horizons and overlying strata suggest a marginal lacustrine environment. All tracks are sub-symmetrical tridactyl and small- to medium-sized pes prints. They have wide, blunt, short digital impressions with a large, rounded heel pad impression. No manus print is observable in the tracksite. Tracks are generally longer than their width with a distinctly developed digit III. Trackways show the inward (negative) rotation of footprints. The morphological characteristics of the footprints are most likely attributable to ichnogenus Caririchnium. A relatively small pes size (lengths range from 13 to 27 cm) indicates that the trackmakers were juvenile to subadult ornithopods when compared with the contemporary large ornithopods in South Korea. The majority of the trackways show preferred orientations with trends of parallel to subparallel groupings on each surface, suggesting gregarious behavior. Notably, the tracksite consists exclusively of juvenile ornithopod dinosaurs, which is an uncommon phenomenon when compared to other ornithopod tracksites with age-mixed or large ornithopod footprints reported from other localities around the world. The absence of the adult ornithopod tracks may be interpreted as the spatial segregation of an ornithopod population based on their ages and the formation of juvenile-only communities without parental care.

2018 年在韩国庆尚南道哈曼县军北区下白垩统哈曼组（阿尔比安）发现了一个新的带有非成年鸟足类脚印的恐龙足迹。 该足迹由 58 个鸟足类足迹（7 个短足迹和26 个独立的脚印）在小溪底部部分暴露的三个轨道承载地平线内。承载轨道的层位和上覆地层的岩相和沉积结构表明边缘湖相环境。所有轨道都是亚对称的三趾动物和中小型 pes 印花。它们具有宽、钝、短的数字印模，带有大而圆的鞋跟垫印模。在赛道上没有观察到手印。轨道通常比它们的宽度长，具有明显发达的数字 III。轨迹显示足迹的向内（负）旋转。足迹的形态特征最有可能归因于 ichnogenus甲藻。相对较小的pes大小（长度在13到27厘米之间）表明，与韩国当代的大型食人鱼相比，田径制作者是幼年至亚成年食人鱼。大多数轨道显示出偏好的方向，每个表面上都有平行到次平行分组的趋势，表明有群居行为。值得注意的是，该轨迹点仅由幼年的鸟足类恐龙组成，与世界其他地方报道的具有年龄混合或大型鸟足类足迹的其他鸟足类轨迹点相比，这是一种罕见的现象。成年鸟足类踪迹的缺失可能被解释为鸟足类种群的空间隔离，基于它们的年龄和没有父母照顾的仅幼鸟群落的形成。