The trilobite Ditomopyge decurtata lived during the Pennsylvanian and Permian. This class of animals first appeared in the Cambrian. Trilobites became extinct at the end of the Permian. This species of trilobite was not very large.
Most fossil specimens found in Kansas are about the size of a pencil eraser.
The image on the left is of the cephalon or head of the specimen. The image on the right shows the pygidium or tail of Ditomopyge .