Eohyattoceras gerthi (FOSSIL) Glenister & Furnish,1987 †
Eohyattoceras leei (FOSSIL) Glenister & Furnish,1987 † USA, Nevada, White Pine
Hyattoceras abichi (FOSSIL) C. Gemmellaro, 1887 † Italy, Sicily, Palermo
Hyattoceras geinitzi (FOSSIL) C. Gemmellaro, 1887 † Italy, Sicily, Palermo
Hyattoceras guembeli (FOSSIL) C. Gemmellaro, 1888 † Italy, Sicily, Palermo
Hyattoceras turgidum (FOSSIL) C. Gemmellaro, 1887 † Italy, Sicily, Palermo