Abstract We present an update and a review of the Late Cretaceous dinosaur tracksites of Bolivia. The Puca Group (Coniacian – Late Maastrichtian) records the tracks and trackways of two different titanosaurid sauropods, ankylosaurs, hadrosaurs and different theropod groups from the Central Andean lacustrine back arc basin. We review the sites from the Maragua syncline (Chuquisaca) and present new data on the famous Toro Toro site (Potosi). Furthermore, the first complete map of the world's largest dinosaur tracksite, Cal Orck'o (El Molino Formation, Sucre) gives an insight into behavior and movement patterns. Parallel trackways of subadult ankylosaurs provide the first unequivocal evidence of social behavior amongst these dinosaurs worldwide. The El Molino Formation and the coeval deposits of Southern Peru and Northern Argentina form a megatracksite with a size of around 100,000 km2. The paleogeographic position of the main sites within the basin suggests that they are part of a seasonal migration route along the shoreline and deltas of an ancient lake system.

中文翻译：

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玻利维亚晚白垩世恐龙记录——回顾与展望

摘要 我们介绍了玻利维亚晚白垩世恐龙足迹的更新和回顾。Puca Group (Coniacian – Late Maastrichtian) 记录了来自中安第斯湖背弧盆地的两种不同的泰坦龙科蜥脚类恐龙、甲龙、鸭嘴龙和不同的兽脚类恐龙群的足迹和轨迹。我们回顾了马拉瓜向斜 (Chuquisaca) 的站点，并提供了著名的 Toro Toro 站点 (Potosi) 的新数据。此外，世界上最大的恐龙足迹站点 Cal Orck'o（El Molino Formation，Sucre）的第一张完整地图提供了对行为和运动模式的洞察。亚成体甲龙的平行轨迹提供了世界范围内这些恐龙社会行为的第一个明确证据。El Molino 地层以及秘鲁南部和阿根廷北部的同期沉积物形成了一个面积约 100,000 平方公里的巨型轨道场。盆地内主要遗址的古地理位置表明，它们是沿海岸线和古代湖泊系统三角洲的季节性迁徙路线的一部分。