King, 1850
Brachial loop long, undergoing development in association with median septum, lophophore up to schizolophous stage, loop in advanced genera developing both from cardinalia and median septum but ultimately becoming free from septum which is partly or entirely resorbed.
Source: Moore, 1965.
The following taxa that belong to this superfamily occur in this region:
Family Dallinidae
Subfamily Dallininae
Genus Dallina
Genus Glaciarcula
Genus Macandrevia
Family Megathirididae
Genus Argyrotheca
Genus Gwynia
Family Platidiidae
Genus Platidia
Argyrotheca cistellula
Dallina septigera
Glaciarcula spitzbergensis
Gwynia capsula
Macandrevia cranium
Platidia anomioides