Proteoceratidae

Proteoceratidae Temporal range: middle Ordovician - early Cretaceous
Orthonybyoceras duseri
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Order:	Orthocerida
Family:	Proteoceratidae Flower, 1962

Proteoceratidae is an extinct family of actively mobile aquatic carnivorous cephalopods belonging to the subclass Nautiloidea endemic to what would be Asia, Australia, Europe, South America and North America during the Ordovician living from 490—445.6 Ma, existing for approximately 44.4 million years.

Proteoceratidae was named by Flower (1962). Its type is Proteoceras. It was assigned to Michelinoceratida by Flower (1962); to Pseudorthocerataceae by Teichert et al. (1964), Sweet (1964) and Evans (1994); to Pseudorthocerida by Kröger and Isakar (2006); and to Orthocerida by Kröger et al. (2007).

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