Huxley, 1869
Shells with only calcareous valves, articulated by a pair of teeth and sockets. Impunctate, punctate or pseudopunctate. All living species have variably developed skeletal lophophore supports. The alimentary canal ends blindly, having no anus.
Source: Moore, 1965.
The following taxa that belong to this class occur in this region:
Order Rhynchonellida
Superfamily Rhynchonellacea
Family Hemithirididae
Genus Hemithiris
Order Terebratulida
Suborder Terebratellidina
Superfamily Terebratellacea
Family Dallinidae
Subfamily Dallininae
Genus Dallina
Genus Glaciarcula
Genus Macandrevia
Family Megathirididae
Genus Argyrotheca
Genus Gwynia
Family Platidiidae
Genus Platidia
Suborder Terebratulidina
Superfamily Terebratulacea
Family Cancellothyrididae
Subfamily Cancellothyridinae
Genus Terebratulina
Argyrotheca cistellula
Dallina septigera
Glaciarcula spitzbergensis
Gwynia capsula
Hemithiris psittacea
Macandrevia cranium
Platidia anomioides
Terebratulina retusa