Rangeroceratidae is a family of orthoceroid cephalopods known from the late Early Ordovician in eastern North America (New York and Quebec) and Great Britain, included in the order Dissidocerida. The family was named by Evans, 2005, and contains three genera: '' Rangeroceras'', '' Anrangeroceras'', and '' Cyclorageroceras''. Rangeroceratidae is based on the genus '' Rangeroceras'', named by Hook & Flower (1977); at that time considered a member of the rod-bearing

Baltoceratidae Baltoceratidae is an extinct family of orthoconic cephalopods belonging to the subclass Nautiloidea endemic to what would be Asia, Australia, Europe, North America, and South America during the Ordovician living from about 480–460 mya, exist ...

along with genera like ''

Rhabdiferoceras ''Rhabdiferoceras'' is an extinct genus of orthocerids belonging to the Baltoceratidae that lived in what would be North America during the Cassinian Stage at the end of the Early Ordovician, existing for approximately two million years from abo ...

'' and ''

Veneficoceras ''Veneficoceras'' is a genus of the rod-bearing Baltoceratidae, an extinct cephalopod family with characteristics of the orthoceratoid Dissidocerida, found in Cassinianage, Lower Ordovician, limestone in western Utah Utah is a landlock ...

''.

References

* Paleobiology Databas
Rangeroceratidae
* D. H. Evans. 2005. The Lower and Middle Ordovician cephalopod faunas of England and Wales. Monograph of the Palaeontographical Society 623:1-81 * Stephen C. Hook and Rousseau H Flower, 1977. Late Canadian (Zones J,K) Cephalopod Faunas from Southwestern United States. New Mexico Bureau of Mines & Mineral Resources Memoir 32. Orthocerida Prehistoric cephalopod families Early Ordovician first appearances Early Ordovician extinctions {{paleo-cephalopod-stub