There are 21 species recognised in the family Actinoposthiidae.[2]
Notes
^A binomial authority in parentheses indicates that the species was originally described in a different genus.
References
^Nilsson, K.S., Wallberg, A., & Jondelius, U. (2011). "New species of Acoela from the Mediterranean, the Red Sea, and the South Pacific." Zootaxa 2867: 1-31.