Grupo Aragosaurus-IUCA, Paleontología, Facultad de Ciencias Universidad de Zaragoza, Zaragoza, Spain ; Institut Català de Paleontologia Miquel Crusafont, Sabadell, Barcelona, Spain.
PLoS One. 2013 Sep 3;8(9):e72579. doi: 10.1371/journal.pone.0072579. eCollection 2013.
A comprehensive review and study of the rich dinosaur track record of the Tremp Formation in the southern Pyrenees of Spain (Southwestern Europe) shows a unique succession of footprint localities prior to the end-Cretaceous mass extinction event. A description of some 30 new tracksites and data on sedimentary environments, track occurrence and preservation, ichnology and chronostratigraphy are provided. These new track localities represent various facies types within a diverse set of fluvial environments. The footprint discoveries mostly represent hadrosaurian and, less abundantly, to sauropod dinosaurs. The hadrosaur tracks are significantly smaller in size than, but morphologically similar to, those of North America and Asia and are attributable to the ichnogenus Hadrosauropodus. The track succession, with more than 40 distinct track levels, indicates that hadrosaur footprints in the Ibero-Armorican region occur predominantly in the late Maaastrichtian (at least above the early Maastrichtian-late Maastrichtian boundary). The highest abundance is found noticeably found in the late Maastrichtian, with tracks occurring in the C29r magnetochron, within about the latest 300,000 years of the Cretaceous.
对西班牙（西南欧）比利牛斯山脉南部的 Tremp 组丰富恐龙足迹记录进行了全面的回顾和研究，结果表明，在白垩纪末期大灭绝事件之前，存在着独特的足迹地点序列。本文描述了大约 30 个新的足迹地点，并提供了有关沉积环境、足迹出现和保存、足迹形态学和年代地层学的数据。这些新的足迹地点代表了不同河流环境中的各种相类型。足迹发现主要代表了鸭嘴龙类恐龙，其次是蜥脚类恐龙。鸭嘴龙足迹的大小明显小于北美和亚洲的足迹，但形态相似，可归入足迹形态属 Hadrosauropodus。足迹序列中，有 40 多个不同的足迹层，表明伊比利亚-阿莫林地区的鸭嘴龙足迹主要出现在马斯特里赫特晚期（至少在早马斯特里赫特晚期-马斯特里赫特晚期界线之上）。在马斯特里赫特晚期，足迹的丰度明显较高，在 C29r 磁层中，大约在白垩纪的最后 30 万年中出现。
