Family Actinophryidae Dujardin, 1841
   Genus Echinosphaerium Hovasse, 1965
     1 Echinosphaerium nucleofilum (Barrett, 1958) Hovasse, 1965
     2 Echinosphaerium akamae Shigenaka, Watanabe & Suzaki, 1980 see Actinosphaerium akamae (Shigenaka, Watanabe & Suzaki, 1980)
     3 Echinosphaerium ikachiensis Shigenaka, Watanabe & Suzaki, 1980 see Actinosphaerium ikachiensis (Shigenaka et al., 1980)