Cephalopod: Baculites compressus (PRI 44571)

Description

Fossil specimen of the ammonoid cephalopod *Baculites compressus* from the Cretaceous Pierre Shale of South Dakota (PRI 44571). Specimen from the collections of the [Paleontological Research Institution](http://www.priweb.org), Ithaca, New York. Specimen is approximately 15.5 cm. Model by Emily Hauf.