Sphenodiscidae
Sphenodiscidae
Eukaryota | Animalia | Mollusca | Cephalopoda | Ammonoidea | Acanthocerataceae | Sphenodiscidae
COL:CS5HF | COL:N | COL:M2L | COL:7NF3H | COL:NY | COL:4RG | COL:GHF
(Chatton, 1925) Whittaker & Margulis, 1978 |  |  | Cuvier, 1795 |  |  | Hyatt, 1900