Acthelmis intestinalis (Fabricius, 1780) (additional source)
Actinostola callosa (Verrill, 1882) (additional source)
Allantactis parasitica Danielssen, 1890 (additional source)
Bolocera maxima Carlgren, 1921 (additional source)
Bolocera tuediae (Johnston, 1832) (additional source)
Cactosoma abyssorum Danielssen, 1890 (additional source)
Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859) (additional source)
Chondrophellia coronata (Verrill, 1883) (additional source)
Cribrinopsis similis Carlgren, 1921 (additional source)
Edwardsia andresi Danielssen, 1890 (additional source)
Edwardsia arctica Carlgren, 1921 (additional source)
Edwardsia vitrea (Danielssen, 1890) (additional source)
Epizoanthus danielsseni Carlgren, 1913 (additional source)
Epizoanthus erdmanni (Danielssen, 1890) (additional source)
Epizoanthus glacialis Danielssen, 1890 (additional source)
Epizoanthus lindahli Carlgren, 1913 (additional source)
Halcampa arctica Carlgren, 1893 (additional source)
Halcampoides purpurea (Studer, 1879) accepted as Halcampoides purpureus (Studer, 1879) (additional source)
Haliactis arctica Carlgren, 1921 (additional source)
Isozoanthus arborescens Danielssen, 1890 (additional source)
Isozoanthus bulbosus Carlgren, 1913 (additional source)
Isozoanthus ingolfi Carlgren, 1913 (additional source)
Liponema multicornis (Verrill, 1880) accepted as Liponema multicorne (Verrill, 1880) (additional source)
Metridium dianthus (Ellis, 1768) (additional source)
Paraphelliactis Carlgren, 1928 (original description)
Paraphelliactis spinosa Carlgren, 1928 (original description)
Phelliactis hertwigii Simon, 1892 (additional source)
Phelliactis robusta Carlgren, 1928 (original description)
Pycnanthus laevis Carlgren, 1921 (additional source)
Sagartiogeton ingolfi Carlgren, 1928 (original description)
Sicyonis ingolfi Carlgren, 1921 (additional source)
Sicyonis tuberculata Carlgren, 1921 (additional source)
Siphonactinopsis laevis Carlgren, 1921 (additional source)
Stomphia coccinea (Müller, 1776) (additional source)
Tealidium jungerseni Carlgren, 1921 (additional source)