Barrandeoceratidae

The Barrandeoceratidae is a family of coiled nautiloids included in the Tarphycerida (sensu lato) that lived from the Middle Ordovician to the Middle Devonian, characterised by mostly compressed shells with a subcentral siphuncle composed of thin-walled segments that may become secondarily ventral.<small>(Flower and Kummel 1950, Sweet 1964)</small>.

The Barrandeoceratidae are derived from the tarphyceratid genus, Centrotarphyceras through Barrandeoceras <small>(Flower 1984)</small>, and is the source for the Uranoceratidae and Nephriticeratidae. These three families form the barrandeoceratid group. Sometimes a fourth family, the Bickmoritidae, is added, based on the genus Bickmorites.

Genera <small>(Flower 1984)</small> include Barrandeoceras, Centrocyrtoceras, Paquettoceras, Savageoceras, Gasconsoceras, Haydenoceras, and Paraplectoceras; and if included, Bickmorites. Avilionella and Laureloceras, included in the Barrandeocerida in the Treatise on Invertebrate Paleontology Part K (1964) have been removed to the Plectoceratidae.

References

• Flower, R.H. & Kummel, B. 1950. A Classification of the Nautiloidea. Journal of Paleontology vol 24, no.5, pp604–616, Sept 1950.
• Flower, R.H. 1984, Bodeiceras, a New Mohawkian Oxycone, with Revision of the Older Barrandeoceratida, and Discussion of the Status of the Order. Journal of Paleontology vol 58, no. 6, pp1372–1379, Nov 1984.
• Sweet, Walter C, 1964. Nautiloidea - Barrandeocerida, in Treatise on Invertebrate Paleontology, Part K, Geol Soc of America, Teichert & Moore,(eds)