Central Taxonomic Thesaurus

Taxon Search
  Animalia
      Echinodermata
        Echinozoa
            Echinoidea
              Euechinoidea
                Irregularia
                 Atelostomata
                    Spatangoida
                            Hemiasteridae
                                     Hemiaster
                                             Hemiaster humphreysanus