Calymene celebra Raymond 1916
Middle Silurian
Niagaran Limestone
Southern
Wisconsin, USA.

Calymene celebra was a species of trilobite described by the paleontologist Percy E. Raymond in 1916. It belonged to the genus Calymene, one of the best-known groups of trilobites from the Paleozoic Era. These arthropods lived during the Silurian Period, approximately 443–419 million years ago, when warm shallow seas covered large portions of ancient continents.
13mm on 31mm slab