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  • Echinoidea
  • Paleogeneral
  • Echinoidea
  • Paleogeneral
  • Thomel, G. R.
  • Africa
  • Algeria
  • Africa
  • Algeria
  • NMNH - Paleobiology Dept.
  • Echinodermata
  • Echinodermata
  • Echinoidea
  • Echinoidea
  • Phymosomatoida
  • Phymosomatoida
  • Phymosomatidae
  • Phymosomatidae
  • Rachiosoma subasperum (Peron & Gauthier)
  • Rachiosoma subasperum (Peron & Gauthier)
  • Cretaceous
  • Cretaceous