Carcinoplax antiqua RISTORI
Yobake cliff
Shimo-Ogano, Ogano city, Chichibu county, Saitama pref., Japan
Middle Miocene, Neogene, Cenozoic (15 Ma)
Width: 50 mm. Crab fossil, recovered from sandstone of the Middle Miocene (16 Ma) Nagura Formation in the Chichibumachi Group formed under the marine environment such as submarine fans.