Sea urchin (Echinoidea)
Kuzubukuro, Higashi-matsuyama city, Saitama pref., Japan
Miocene, Neogene, Cenozoic (14 Ma)
Width: 20 mm. Sea urchin fossil recovered from Negishi Formation formed under the marine environment such as continental shelf.
Other localities
- Sea urchin in Cenozoic (Kuzubukuro, Saitama pref.)
- Sea urchin in Mesozoic (Jukkoku pass, Gunma pref.)