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Science. 1970 Aug 28;169(3948):854-5.

Isopod from the Pennsylvanian of Illinois.

Abstract

Hesslerella shermani is described as the oldest representative of the crustacean superorder Peracarida, order Isopoda, suborder Phreatoicidea. This description is based on a single specimen of exceptional preservation from the Middle Pennsylvanian of Illinois. The existence of isopods in the Pennsylvanian raises some questions concerning peracarid and eumalocostracan evolution.

PMID:
5432581
[PubMed - indexed for MEDLINE]
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