| Literature DB >> 17842092 |
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.Year: 1966 PMID: 17842092 DOI: 10.1126/science.151.3706.75-a
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728