Acontiaria Stephenson, 1935 accepted as
Metridioidea Rodríguez & Daly in Rodríguez et al., 2014 accepted as
Metridioidea Carlgren, 1893 (original description)
Actinauge richardi (Marion, 1906) (additional source)
Adamsia palliata (Fabricius, 1779) accepted as
Calliactis palliata (Müller, 1776) (additional source)
Bolocera tuediae (Johnston, 1832) (additional source)
Eloactis mazeli (Jourdan, 1880) accepted as
Anemonactis mazeli (Jourdan, 1880) (additional source)
Halcampa clavus (Quoy & Gaimard, 1833) accepted as
Anemonactis clavus (Quoy & Gaimard, 1833) (additional source)
Halcampella Andres, 1883 (additional source)
Halcampoides purpurea (Studer, 1879) accepted as
Halcampoides purpureus (Studer, 1879) (additional source)
Hormathia coronata (Gosse, 1858) (additional source)
Hormathia digitata (O.F. Müller, 1776) (additional source)
Isophelliidae accepted as
Andvakiidae Danielssen, 1890 (original description)
Metridium senile (Linnaeus, 1761) (additional source)
Nematostella Stephenson, 1935 (original description)