Muir-Wood, 1955
Loop developed in connection with both cardinalia and median septum.
Source: Moore, 1965.
The following taxa that belong to this suborder occur in this region:
Superfamily Terebratellacea
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