Callianassa stimpsoni Gabb 1864
Crustacean
Late Cretaceous
Osberger Gulch Sandstone Member – Hornbrook Formation
Ashland, Oregon, USA

55mm ghost shrimp on 119mm matrix.

Crustacean.

Callianassa is a genus of mud shrimps that dates back to the Cretaceous and still lives today.

Here’s a specimen from a lesser-known locality in southern Oregon.  Specimens have been found in the same formation in northernmost California as well. Many are found preserved right in their burrows.