Actinopyga

Bronn, 1860

17 species

Generally 20 tentacles but occasionally more. Ambulacral appendages papillae on bivium and pedicels on the trivium, the former being scattered and the latter usually arranged in three more or less distinct rows. Anal teeth present. Calcareous ring has well marked, beveled, ampullary notches, and the anterior border has no deep indentation between the radials and the interradials. Spicules small, taking the form of dichotomously branching rods, spinous rods or both. Tables and buttons never present. (Deichmann, 1930)

Tentacles 20-30 (usually 20 or 25); pedicels usually arranged in three more or less distinct rows on the ventral side, papillae only on the dorsal side, scattered; anus with 5 distinct calcified anal teeth; body wall similar to that found in Bohadschia; size as Bohadschia; calcareous ring similar to that found in Bohadschia; spicules consisting of rods, generally more slender than those of Bohadschia, dichoto-mously branching not so profuse, spinous rods more commonly present, tables, buttons or elaborated never present. (Rowe, 1969)