Wormlike Fossil from the Pennsylvanian of Illinois

7 January 1966

journal article
research article
Published by American Association for the Advancement of Science (AAAS) in Science

Vol. 151 (3706) , 75-76
https://doi.org/10.1126/science.151.3706.75-a

Abstract

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.

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