Construction Journal
Proteoceratidae
2026-11-16 04:27:31 · The Daily Ledger
Proteoceratidae is an extinct family of actively mobile aquatic carnivorous cephalopods belonging to the subclass Orthoceratoidea 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 .
Taxonomy
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).

Genera
Archigeisonoceras
Baykonuroceras
Cyrtactinoceras
Ephippiorthoceras
Euorthoceras
Gangshanoceras
Gorbyoceras
Isorthoceras
Liulinoceras
Mesnaquaceras
Metephippiorthoceras
Monomuchites
Orthonybyoceras
Paraproteoceras
Proteoceras
Pseudoliolinoceras
Stereospyroceras
Tofangoceras
Transorthoceras
Treptoceras
Ulmioceras
References
External links
Orthocerida
Ordovician cephalopods
Ordovician cephalopods of Asia
Ordovician cephalopods of Europe
Ordovician cephalopods of North America
Ordovician cephalopods of South America
Middle Ordovician first appearances
Early Cretaceous extinctions
