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. 1966 Jan 7;151(3706):75-6.
doi: 10.1126/science.151.3706.75-a.

Wormlike fossil from the pennsylvanian of illinois

E S Richardson Jr

Wormlike fossil from the pennsylvanian of illinois

E S Richardson Jr. Science. .

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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