Abstract Three parallel, manus-only sauropod trackways from the Coffee Hollow A-Male tracksite (Glen Rose Formation, Kendall County, Texas) were studied separately by researchers from the Heritage Museum of the Texas Hill Country and the Houston Museum of Natural Sciences. Footprint and trackway measurements generally show good agreement between the two groups’ data sets. Footprints appear to be shallowly impressed true tracks rather than undertracks. One of the Coffee Hollow trackways shows marked asymmetry in the lengths of paces that begin with the left as opposed to the right forefoot, and two of the Coffee Hollow trackways are unusually broad. The Coffee Hollow trackways differ enough from the manus portions of other Glen Rose Formation sauropod trackways to suggest that they were made by a different kind of sauropod. Greater differential pressure exerted on the substrate by the forefeet than the hindfeet probably explains the Coffee Hollow trackways, like other manus-only sauropod trackways, but the possibility that they indicate unusual locomotion cannot at present be ruled out.

中文翻译：

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雷霆蜥蜴倒立：来自 Glen Rose 组（下白垩纪，德克萨斯州肯德尔县）的仅马努斯蜥脚类恐龙轨道

摘要 德克萨斯丘陵地区遗产博物馆和休斯顿自然科学博物馆的研究人员分别研究了来自咖啡空心 A-Male 赛道（格伦罗斯组，德克萨斯州肯德尔县）的三个平行的、仅用于 manus 的蜥脚类恐龙轨迹。足迹和轨道测量通常显示两组数据集之间的良好一致性。足迹似乎是浅显的真实轨迹，而不是底轨。其中一条 Coffee Hollow 履带显示出从左脚开始的步幅长度明显不对称，而不是从右前脚开始，另外两条 Coffee Hollow 履带异常宽阔。Coffee Hollow 轨道与其他 Glen Rose Formation 蜥脚类恐龙轨道的 manus 部分有很大不同，表明它们是由不同种类的蜥脚类恐龙制造的。