The Barrandeoceratidae is a family of coiled nautiloids included in the Tarphycerida

Tarphycerida

The Tarphycerida were the first of the coiled cephalopods. They are found in marine sediments from the Lower Ordovician to the Middle Devonian. Some like Aphetoceras and Estonioceras are loosely coiled, gyroconic, others like Campbelloceras, Tarphyceras, and Trocholites are tightly coiled, but...

 (sensu latu) that lived from the Middle Ordovician to the Middle Devonian, characterised by mostly compressed shells with a subcentral siphuncle

Siphuncle

The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk. Only cephalopods with chambered shells have siphuncles, such as the extinct ammonites and belemnites, and the living nautiluses, cuttlefish, and Spirula...

 composed of thin-walled segments that may become secondarily ventral.(Flower and Kummel 1950, Sweet 1964).

The Barrandeoceratidae are derived from the tarphyceritid

Tarphyceratidae

The Tarphyceratidae are tightly coiled, evolute Tarphycerida with ventral siphuncles. The dorsum is characteristically impressed where the whorl presses against the venter of the previous. The Tarphyceratidae are derived from Bassleroceras or possibly from some member of the...

 genus, Centrotarphyceras through Barrandeoceras (Flower 1984), and is the source for the Uranoceratidae

Uranoceratidae

Uranoceratidae is a family of Silurian barrandeoceroids that tend to become uncoiled with age and in which siphuncle segments tend to be expanded into the camerae.....

 and Nephriticeratidae. These three families form the barrandeoceratid group. Sometimes a fourth family, the Bickmoritidae, is added, based on the genus Bickmorites.

Genera (Flower 1984) 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

Treatise on Invertebrate Paleontology

The Treatise on Invertebrate Paleontology published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and...

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)