Duméril, 1806
Solitary, marine, bivalved, coelomata invertebrates, bilateraly symmetrical about median plane normal to surface of separation between valves; shell chitinophosphatic or calcareous, attached to substratum by muscular stalk (pedicle) or secondarily cemented or free and composed of commonly larger pedicle (ventral) valve and brachial (dorsal) valve lined by mantle extensions of body wall; epistome possibly represented by brachial fold in front of mouth, feeding organ (lophophore) filamentar, variably disposed and suspended between mantles; alimentary canal with or without anus; nervous system subepithelial, principal ganglion subenteric, located below oesophagus; one, rarely two, pairs of metanephridia also acting as gonoducts; circulatory system open, commonly with dorsal contractile vescicle; coelom schizocoelic or enterocoelic; mostly dioecious.
The following taxa that belong to this phylum occur in this region:
Class Articulata
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
Class Inarticulata
Order Acrotretida
Suborder Craniidina
Superfamily Craniacea
Family Craniidae
Genus Crania
Argyrotheca cistellula
Crania anomala
Dallina septigera
Glaciarcula spitzbergensis
Gwynia capsula
Hemithiris psittacea
Macandrevia cranium
Platidia anomioides
Terebratulina retusa