The following species are required:
Cressa dubia (Bate, 1857)
Deflexilodes subnudus (Norman, 1889)
Dulichia tuberculata (Boeck, 1870)
Eusirus longipes Boeck, 1861
Hyperoche medusarum (Kroyer, 1838)
Iphimedia minuta G.O. Sars, 1882
Jassa pusilla (Sars, 1894)
Lafystius sturionis Krøyer, 1842
Lembos websteri (Bate, 1857)
Leptocheirus hirsutimanus (Bate, 1862)
Leucothoe spinicarpa (Abildgaard, 1789)
Melphidippella macra (Norman, 1869)
Menigratopsis svennilssoni Dahl, 1945
Metopa borealis Sars, 1882
Metopa solsbergi Schneider, 1884
Microdeutopus versiculatus (Bate, 1856)
Monoculodes norvegicus (Boeck, 1861)
Orchomenella minuta (Kroyer, 1846)
Othomaera othonis (Milne-Edwards, 1830)
Paramphilochoides intermedius (Scott, 1896)
Paramphilochoides odontonyx (Boeck, 1871)
Pleusymtes glaber (Boeck, 1861)
Socarnes vahlii (Kroyer, 1838)
Synchelidium tenuimanum (Norman, 1895)