脊索动物
泥盆纪
古生物学
棘皮动物
古生代
地质学
痕迹化石
生物
脊椎动物
生物化学
基因
作者
Owen E. Sutcliffe,Wouter H. Südkamp,R. P. S. Jefferies
出处
期刊:Lethaia
[Wiley]
日期:2000-03-01
卷期号:33 (1): 1-12
被引量:22
标识
DOI:10.1080/00241160050150267
摘要
The mitrates are controversial marine Palaeozoic fossils, assigned either to the chordates or to the echinoderms. This paper describes two trails associated with the mitrate Rhenocystis from the Lower Devonian Hunsrück Slate, Bundenbach, Germany. They indicate that, just before death, the animals were moving tail-first with the flat dorsal surface of the head upward. This behaviour is consistent with the chordate theory of mitrates, rather than with either of the two current echinoderm interpretations.
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