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.
- Publication:
-
Science
- Pub Date:
- August 1970
- DOI:
- 10.1126/science.169.3948.854
- Bibcode:
- 1970Sci...169..854S