Arachnactis albida Sars, 1846 (additional source)
Arachnactis bournei Fowler, 1897 accepted as Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859) (additional source)
Arachnanthus Carlgren, 1912 (original description)
Arachnanthus oligopodus (Cerfontaine, 1891) (additional source)
Arachnanthus sarsi Carlgren, 1912 (original description)
Botruanthus benedeni (Torrey & Kleeberger, 1909) (additional source)
Botrucnidifer Carlgren, 1912 (original description)
Botrucnidifer norvegicus Carlgren, 1912 (original description)
Ceriantheopsis Carlgren, 1912 (original description)
Ceriantheopsis americana (Agassiz in Verrill, 1864) (additional source)
Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859) (additional source)
Cerianthus membranaceus (Gmelin, 1791) (additional source)
Cerianthus roulei Carlgren, 1912 accepted as Synarachnactis roulei (Carlgren, 1912) (original description)
Cerianthus sulcatus Kwietniewski, 1898 (additional source)
Cerianthus taedus McMurrich, 1910 (additional source)
Cerianthus valdiviae Carlgren, 1912 (original description)
Cerianthus vogti Danielssen, 1890 (additional source)
Pachycerianthus aestuari (Torrey & Kleeburger, 1909) (additional source)
Pachycerianthus benedeni Roule, 1904 (additional source)
Pachycerianthus fimbriatus McMurrich, 1910 (additional source)
Pachycerianthus johnsoni (Torrey & Kleeburger, 1909) (additional source)
Pachycerianthus maua (Carlgren, 1900) (additional source)
Pachycerianthus monostichus McMurrich, 1910 (additional source)
Pachycerianthus solitarius (Rapp, 1829) (additional source)
Scytophorus antarcticus (Pfeffer, 1889) (additional source)