Huhn, 1949

Usually circular or subcircular in outline, shell phosphatic or punctate calcareous; pedicle opening, when present, confined to pedicle valve, growth of pedicle valve holoperipheral or mixoperipheral; shell secretion of brachial valve more variable, beak marginal to subcentral.

Source: Moore, 1965.

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

Suborder Craniidina
Superfamily Craniacea
Family Craniidae
Genus Crania
Crania anomala

Kingdom Animalia
Phylum Brachiopoda
Class Inarticulata
Order Acrotretida

Scientific synonyms and common names

Daikaulia Waagen, 1885
Gasteropegmata Waagen, 1885
Neotremata Beecher, 1891
Acrotretacea Kuhn, 1949
nom. correct. Goryansky, 1960

Moore, R.C. (ed.), 1965. Treatise on Invertebrate Paleontology. Part H, Brachiopoda, 2 vols. The Geological Society of America, Inc. & The University Of Kansas Press, 927 pp.

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