Genus

Ephippiorthoceras Foerste, 1924

Selection of related publications

Kröger, B. 2025. The Lyckholm acme of cephalopods – Review of the late Katian (Vormsi–Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978, 1-168. DOI:10.5852/ejt.2025.978.2801

Strand, T. 1934. The Upper Ordovician Cephalopods of the Oslo Area. Norsk Geologisk Tidsskrift 14, 1-117.

List of species

1. Ephippiorthoceras frognoyense Strand, 1934 | Upper Ordovician

2. Ephippiorthoceras plicatuloides Strand, 1934 | Ordovician

3. Ephippiorthoceras vormsiense Kröger, 2025 | Pirgu Stage

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Mollusca
Class	Cephalopoda
Subclass	Orthoceratia
Order	Orthocerida
Suborder	Orthoceratina
Family	Proteoceratidae
Genus	Clothoceras
	Ephippiorthoceras
Species	frognoyense
	plicatuloides
	vormsiense
Genus	Gorbyoceras
	Isorthoceras
	Transorthoceras