Aenigmacaris cornigerum
Crustacean
Late Mississippian
Bear Gulch Limestone
Fergus county, Montana, USA

Excellent 90mm shrimp on 190mm slab. Nice detail.

Arthropod. Crustacean.

Aenigmacaris is an extinct genus of shrimp known from the Early Carboniferous of Montana and New Mexico.

It was probably delicious in its day.