Ten-Armed Fossil Cephalopod from the Pennsylvanian of Illinois

Science  02 Feb 1968:
Vol. 159, Issue 3814, pp. 526-528
DOI: 10.1126/science.159.3814.526


Jeletzkya douglassae Johnson and Richardson is described as the oldest known representative of an extant squid group. The species is known from a single specimen from the Middle Pennsylvanian of Illinois. This very unusual fossil consists of the complete tentacular crown and a fragile shell. The arms bear hooks in double rows.