the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Echinoidea > order Cidaroidea > member of
cidaroid1955
1955 L. H. HymanInvertebrates IV. xv. 515Cidaroids have but two kinds of pedicellariae.