Cephalopoda - Orthocerida - Proteoceratidae

Alternative combinations: Orthoceras tyronensis, Sactoceras tyronensis

Synonym: Sactoceras josephianum Foerste 1933

Belongs to Proteoceras according to R. C. Frey 1995

Sister taxa: Proteoceras moniliforme, Proteoceras perkinsi

Type specimens:

• Proteoceras tyronensis: USNM 87109. Its type locality is High Bridge, which is in a Rocklandian shallow subtidal limestone in the Tyrone Limestone Formation of Kentucky.
• Sactoceras josephianum: