The 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.Flower, R.H. & Kummel, B. 1950. A Classification of the Nautiloidea. Journal of Paleontology vol 24, no.5, pp604–616, Sept 1950.
Description Shells of uranoceratids are gyroconic. Early stages of a few species are annulated. Later stages of all are smooth or faintly striated or cancellated.Sweet, Walter C, 1964. Nautiloidea - Barrandeocerida, in Treatise on Invertebrate Paleontology, Part K, Geol Soc of America, Teichert & Moore(eds). In many, septal necks are straight, but in others recumbent on one side or the other. Connecting rings are thin.
Derivation and content The Uranoceratidae are derived from Bickmorites. Genera include: Uranoceras Jolietoceras Cumingsoceras, and Cliftonoceras.
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