Ogygopsis klotzi
Trilobite
Middle Cambrian
Burgess Shale, Stephens Formation
Field, British Columbia, Canada

Big 68mm trilobite on 132mm slab. These are almost always missing the free cheeks so an example this complete is very rare.

Ogygopsis is well-known trilobite genus from the Middle Cambrian-age Burgess Shale of British Columbia, Canada.  It is a rare find at other Middle Cambrian sites around the world (Utah, Idaho, Greenland, Kazakhstan, and even Antarctica) and has also been reported from the Early Cambrian of California and Nevada.