Gillicus arcuatus

(GILL ih kus)

Description: Ray-finned Fish

Specimen location: Niobrara Chalk of Northwestern Kansas

These Gillicus remains are actually the fossilized, partially digested stomach contents from a larger prehistoric fish, Xiphactinus. Scientists have discovered several Xiphactinus skeletons containing the skeleton of a fish it swallowed, usually Gillicus.

Discoverer: Michael Everhart