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Echinoidea, Echinoid(s), Sea urchin(s)

class Echinoidea Leske, 1778

• Modern species
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Echinodermata

• Distribution
• Silurian: Gifu
• Permian: Gunma, Gifu, Shiga
• Jurassic: Nagano, Tokyo, Mie, Wakayama, Tokushima, Ehime
• Jurassic-Cretaceous: Nagano
• Cretaceous: Hokkaido, Iwate, Nagano, Ibaraki, Saitama, Osaka, Wakayama, Kagawa, Tokushima, Ehime
• Paleogene-Neogene: Nagano
• Eocene: Okayama, Yamaguchi
• Oligocene: Nagano, Saitama, Chiba
• Miocene: Hokkaido, Aomori, Akita, Miyagi, Yamagata, Fukushima, Niigata, Nagano, Yamanashi, Toyama, Ishikawa, Fukui, Gunma, Tochigi, Ibaraki, Saitama, Tokyo, Kanagawa, Shizuoka, Aichi, Gifu, Mie, Hyogo, Okayama, Hiroshima, Tottori, Shimane, Yamaguchi, Kagawa
• Miocene-Pliocene: Fukushima, Nagano, Shizuoka
• Pliocene: Hokkaido, Aomori, Niigata, Toyama, Ibaraki, Chiba, Shizuoka
• Pliocene-Pleistocene: Niigata, Kanagawa
• Quaternary: Hiroshima
• Pleistocene: Hokkaido, Yamagata, Niigata, Toyama, Ishikawa, Ibaraki, Chiba, Kanagawa, Aichi
• Holocene: Chiba, Aichi
• Investigation in progress: Saitama, Shizuoka

• Distribution (Feeding marks)
• Miocene: Aichi
• Pliocene: Aomori, Shizuoka
• Pleistocene: Chiba

• Subtaxa
• Astriclypeus, genus
• Cidaris, genus
• Echinarachnius, genus
• Echinodiscus chikuzenensis
• Echinolampas, genus
• Fibulariella acuta
• Fibulariidae, family
• Heliocidaris, genus
• Hemicentrotus, genus
• Holasteroida, order
• Kewia minoensis
• Kewia minuta
• Laganidae, family
• Nipponaster nakaminatoensis
• Prionocidaris, genus
• Scaphechinus, genus
• Spatangoida, order
• Stereocidaris, genus
• Strongylocentrotus, genus
• Temnopleurus, genus
• Lintalium sp.??? (Tottori)