Kuhn, 1949
Articulate brachiopods, usually with rostrate shell, functional pedicle developed, delthyrium partially closed by deltidial plates. Mantle canals much branched, with one pair of main trunks in each mantle. Median septum commonly supporting septalium or hinge plates in brachial valve; dental plates usually present; spondylia normally absent. Recent representatives mostly with 2 pairs of metanephridia, lophophore spirolophous, with ventrodorsally directed cones supported by crura. Shell substance normally impunctate, rarely with inner fibrous layer punctate.
Source: Moore, 1965.
The following taxa that belong to this order occur in this region:
Superfamily Rhynchonellacea
Family Hemithirididae
Genus Hemithiris
Hemithiris psittacea