0.7" Fossil Crab Pinnixa Galliheri Pea Crab Monterey Cty San Luis Obispo Miocene Epoch

Location: San Luis Obispo County, California, Monterey Formation

Weight: 6.8 Ounces 

Dimensions: 3.2 Inches Long, 3 Inches Wide, 1.2 Inches Thick (Plate)

Crab Dimensions: 0.7 Inches Long, 0.4 Inches Wide

Comes with a Certificate of Authenticity.

The item pictured is the one you will receive. 

Miocene Epoch, 8 Million Years old

Pinnixa galliheri – Fossil Pea Crab
This fascinating fossil crab, Pinnixa galliheri, comes from the Monterey Shale along California’s central coast, just south of Monterey Bay. Formed about 8 million years ago, this shale layer preserves an exceptional variety of marine and coastal life. Within it, pea crabs appear in stunning detail, often accompanied by fossils of fish, pine needles, cones, and palm fronds—evidence of a warm, tropical shoreline that once existed here.

The genus Pinnixa still thrives today, living along the California coast from Baja to the Pacific Northwest, and throughout the western Pacific, connecting these ancient fossils to their modern relatives.