Cincinnati Actinoceratida

Various cephalopods from the Midwestern/Eastern United States of the Middle Ordovician, including Actinoceras bigsbyi, Cameroceras rowenaense, Troedssonoceras multiliratum, Triendoceras davisi, Armenoceras richmondense, Lambeoceras richmondense, and Ordogeisonoceras amplicameratum, along with the trilobite Isotelus maximus and the sponges Hindia gregaria (in pyramidal stacks) and H. subrotunda (the bowls).

Part of an art trade with *rachaelm5