Brachiopod classification

The classification of brachiopods is being discussed at present. The following is an overview of the different schemes which are proposed.
The "traditional" classification was defined in 1869. Two further approaches were established in the 1990s:
Principles.
Underlying the discussion are some basic principles:
About 330 living species are recognized, grouped into over 100 genera. The great majority of modern brachiopods are rhynchonelliforms (Articulata, but excluding Craniida).