Trocholites is a tarphycerid genus in the family Trocholitidae from the Middle and Late Ordovician with a gradually expanding, weakly ribbed shell; whorls in contact, dorsum slightly impressed; cross section depressed, venter and sides rounded; siphuncle close to but not at the dorsal margin. Trochoceras, of similar name, is a member of the Rutoceratidae in the Nautilida, and therefore only very distantly related back through the Bassleroceratidae.