Thunder lizard handstands: Manus-only sauropod trackways from the Glen Rose Formation (Lower Cretaceous, Kendall County, Texas)

IF 0.8 4区地球科学 Q4 PALEONTOLOGY

Ichnos-An International Journal for Plant and Animal Traces Pub Date : 2020-04-02 DOI:10.1080/10420940.2019.1698424

J. Farlow, R. Bakker, Benjamin F. Dattilo, E. Everett Deschner, P. Falkingham, Crystal Harter, Richard Solis, D. Temple, W. Ward

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引用次数: 1

Abstract

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.

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雷蜥倒立:来自格伦玫瑰地层(下白垩纪，德克萨斯州肯德尔县)的只有手的蜥脚类恐龙的足迹

来自德克萨斯州肯德尔县格伦罗斯地层的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山谷a -雄足迹遗址的三条平行的、只有手的蜥脚类恐龙足迹。足迹和轨道测量结果在两组数据集之间普遍显示出良好的一致性。脚印似乎是浅层留下的真正的痕迹，而不是痕迹。其中一条咖啡谷的步道显示出明显的不对称，步道的长度从左前脚开始，而不是右前脚，另外两条咖啡谷的步道异常宽阔。咖啡谷的足迹与其他格伦玫瑰地层蜥脚类恐龙足迹的手工部分有很大的不同，这表明它们是由另一种蜥脚类恐龙留下的。前脚比后脚施加在基底上的压力差更大，这可能解释了咖啡山谷的足迹，就像其他只有手的蜥脚类动物的足迹一样，但目前还不能排除它们表明不寻常运动的可能性。

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来源期刊

Ichnos-An International Journal for Plant and Animal Traces PALEONTOLOGY-

CiteScore

2.50

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： The foremost aim of Ichnos is to promote excellence in ichnologic research. Primary emphases center upon the ethologic and ecologic significance of tracemaking organisms; organism-substrate interrelationships; and the role of biogenic processes in environmental reconstruction, sediment dynamics, sequence or event stratigraphy, biogeochemistry, and sedimentary diagenesis. Each contribution rests upon a firm taxonomic foundation, although papers dealing solely with systematics and nomenclature may have less priority than those dealing with conceptual and interpretive aspects of ichnology. Contributions from biologists and geologists are equally welcome. The format for Ichnos is designed to accommodate several types of manuscripts, including Research Articles (comprehensive articles dealing with original, fundamental research in ichnology), and Short Communications (short, succinct papers treating certain aspects of the history of ichnology, book reviews, news and notes, or invited comments dealing with current or contentious issues). The large page size and two-column format lend flexibility to the design of tables and illustrations. Thorough but timely reviews and rapid publication of manuscripts are integral parts of the process.