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Pelanechinus : ウィキペディア英語版 | Pelanechinus
''Pelanechinus'' is an extinct genus of sea urchins in the order Echinothurioida. It is placed in the family Pelanechinidae and is in the stem group of echinoids.〔 ==Species== ''Pelanechinus corallina'' † (Wright, 1858) - known from the Oxfordian and Late Jurassic of England. ''Pelanechinus oolithicum'' † (Hess, 1972) - known from the Bajocian and Middle Jurassic of Switzerland. It was originally described as ''Pelanodiadema oolithicum'' Hess, 1972 (Pelanodiademinae Hess, 1972) but ''Pelanodiadema'' is now considered to be a synonym of ''Pelanechinus''.〔 ''Pelanechinus triceps'' † Quenstedt 1858 - known from the Jura Mountains. It was originally described as ''Leptocidaris triceps'' but the genus ''Leptocidaris'' is now considered to be a junior synonym of ''Pelanechinus''.
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