Wormlike Fossil from the Pennsylvanian of Illinois
Wormlike Fossil from the Pennsylvanian of Illinois
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来自伊利诺伊州宾夕法尼亚州的蠕虫状化石
DOI:
10.1126/science.151.3706.75-a
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发表时间:
1966
期刊:
影响因子:
56.9
通讯作者:
E. Richardson
中科院分区:
文献类型:
--
作者:
E. Richardson
Tullimonstrum gregarium was a common, possibly marine, invertebrate in certain shallow, offshore waters of northern Illinois during the Middle Pennsylvanian. It had a flexible proboscis armed with teeth; a mobile tail; and a curious transverse bar behind the head, bearing a pair of round, external organs.