†Seelyoceras Ulrich and Foerste 1936 (mollusk)
Cephalopoda - Tarphycerida - Tarphyceratidae
Parent taxon: Tarphyceratidae according to C. Teichert et al. 1964
Sister taxa: Campbelloceras, Centrotarphyceras, Cycloplectoceras, Eurystomites, Moreauoceras, Pilotoceras, Pionoceras, Tarphyceras
Subtaxa: Seelyoceras raei
Type: Cyrtoceras raei
Ecology: fast-moving nektobenthic carnivore