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Thomson, 1926

Valves capillate, brachial loop short, crural processes may unite to form ringlike loop, crural bases attached to socket ridges; hinge plates and median septum only exceptionally developed; adult lophophore spirolophous, plectolophous, or subplectolophous.

Source: Moore, 1965.

The following taxa that belong to this family occur in this region:

Subfamily Cancellothyridinae
Genus Terebratulina
Terebratulina retusa

Family Cancellothyrididae