SYSTEMATIC PALEONTOLOGY

Phylum Mollusca

Mollusca

The Mollusca , common name molluscs or mollusksSpelled mollusks in the USA, see reasons given in Rosenberg's ; for the spelling mollusc see the reasons given by , is a large phylum of invertebrate animals. There are around 85,000 recognized extant species of molluscs. Mollusca is the largest...

 

Class Cephalopoda 

Subclass Nautiloidea 

Superorder Orthoceratoidea

Orthoceratoidea

The Orthoceratoidea is a superorder , sometimes considered an infraclass or even a subclass, that comprizes nautiloid orders that have orthoconic to slightly cyrtoconic shells and central to subcentral siphuncles in which there may be internal deposits...

 

Order Dissidocerida

Dissidocerida

The Dissidocerida comprise an order of Early Ordovician to the Early Silurian orthoceratoid cephalopods in which the siphuncle has a continuous lining or a longitudinal rod-like structure within....

 

Family Rangeroceratidae Evans, 2005.

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

Rangeroceras

Rangeroceras is an extinct nautiloid cephalopod genus that lived in what is now western North America during the latter part of the Early Ordovician....

, Anrangeroceras, and Cyclorageroceras.

The Rangeroceratidae is based on the genus Rangeroceras

Rangeroceras

Rangeroceras is an extinct nautiloid cephalopod genus that lived in what is now western North America during the latter part of the Early Ordovician....

, named by Hook & Flower (1977); at that time considered a member of the rod-bearing Baltoceratidae

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, existing for approximately .-Taxonomy:Baltoceratidae was...

 along with genera like Rhabdiferoceras

Rhabdiferoceras

Rhabdiferoceras is an extinct orthocerid genus 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 about 474 -472 mya....

and Veneficoceras

Veneficoceras

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

.

References

• Paleobiology Database 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.