Acontiaria Stephenson, 1935 (basis of record)
Actiniaria (additional source)
Actinioidea Rafinesque, 1815 (basis of record)
Aiptasia diaphana (Rapp, 1829) accepted as Exaiptasia diaphana (Rapp, 1829) (additional source)
Aiptasia pulchella Carlgren, 1943 accepted as Exaiptasia pallida (Agassiz in Verrill, 1864) represented as Exaiptasia diaphana (Rapp, 1829) (additional source)
Anemonia alicemartinae Häussermann & Försterra, 2001 (additional source)
Athenaria (basis of record)
Bunodosoma californicum Carlgren, 1951 (basis of record)
Cereus pedunculatus (Pennant, 1777) (additional source)
Ceriantharia (additional source)
Cerianthidae Milne Edwards & Haime, 1851 (additional source)
Cylista Wright, 1859 (basis of record)
Diadumene cincta Stephenson, 1925 (additional source)
Diadumene franciscana Hand, 1956 (additional source)
Diadumene leucolena (Verrill, 1866) (additional source)
Diadumene lineata (Verrill, 1869) (basis of record)
Haliplanella lineata (Verrill, 1869) accepted as Diadumene lineata (Verrill, 1869) (additional source)
Hexacorallia (additional source)
Metridioidea Carlgren, 1893 (basis of record)
Metridium senile (Linnaeus, 1761) (additional source)
Nematostella vectensis Stephenson, 1935 (additional source)
Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia luciae Verrill, 1898 accepted as Diadumene lineata (Verrill, 1869) (source of synonymy)
Sagartia ornata (Holdsworth, 1855) accepted as Cylista ornata (Holdsworth, 1855) (additional source)
Spirularia (basis of record)
Thenaria (basis of record)