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