†subfamily Orthoceratinae McCoy 1844 (mollusk)
I made this to separate the subfamily from the family.
Parent taxon: Orthoceratidae according to W. C. Sweet 1964
Sister taxa: Aethiosolen, Anaspyroceratinae, Chebbioceras, Ctenoceras, Infundibuloceras, Kopaninoceras, Leurocycloceratinae, Merocycloceras, Michelinoceras, Michelinoceratinae, Orthoceras, Orthocycloceras, Palorthoceras, Pleurorthoceras, Pojetoceras, Prohypogeophis, Prohypogeophis tunariensis, Pseudospyroceras, Striatocycloceras, Theoceras, Tibichoanoceras, Tienoceras
Subtaxa: Bifoveoceras
Ecology: nektonic carnivore
Distribution:
• Ordovician of Estonia (2 collections)
Total: 2 collections each including a single occurrence