Paleozoic Nautiloid Fossils of Iowa

Listed are the classifications of Moore, Treatise on Invertebrate Paleontology, Volume K (#3)

Note: Fossils in red have been found in the Devonian and Ordovician of Iowa by the author (and his friends) of this page.

• Class Cephalopoda
  • Subclass Nautiloidea
    • Order Actinocerida (M. Ord-Miss)
      • Family Actinoceratidae (L. Ord-L. Sil)
        • Subfamily - none
          • Actinoceras (L. Ord-L. Sil) IA
    • Order Barrandeoceratida (M. Ord-M. Dev)
      • Family Apsidoceratidae (M. Ord-U. Ord)
        • Subfamily - none
          • Charactoceras (U.Ord) CO, IA, MN, NY
          • Charactocerina (U.Ord) IN, WY
          • Deckeroceras (U.Ord) IA, OK
          • Fremontoceras (M-U.Ord) CO, NY
          • Wilsonoceras (U.Ord) WY
    • Order Endoceratidae
      • Family Endocerida
        • Subfamily - none
          • Endoceras (U. Ord) IA,IL,WI
          • "Cycle-endoceras" (U. Ord) IA, IL, WI
          • Cyptendoceras (L. Ord) MO
    • Order Orthocerida (L.Ord-U.Trias.)
      • Family Orthoceratidae (Ord.-U.Trias.)
        • Subfamily Michelinoceratinae
          • Michelinoceras (Ord-U.Trias)
          • Plagiostomoceras (Ord-L.Dev)
        • Subfamily Kionoceratinae
          • Kionoceras (M.Ord-L.Perm)
          • Polygrammoceras (M.Ord-L.Dev)
      • Family Pseudorthoceratidae (L.Sil.-Perm.)
        • Subfamily Pseudorthoceratinae (M.Dev-L.Perm)
          • Pseudorthoceras (U.Dev-L.Perm) N.America
          • Mooreoceras (U.Dev-L.Perm) N.America
          • ?Neocycloceras (U.Dev-U.Miss) USA(Pa.
        • Subfamily Spyroceratinae (Ord,?L.Sil,M.Sil-Perm)
          • Spyroceras (Dev) N. America
          • Anastomoceras (L.Dev) NY
          • Cryptorthoceras (M.Dev) NY
          • ?Cryptospyroceras (M.Dev) NY
          • Diagoceras (M.Dev) NY
          • Dolorthoceras (M.Dev) NY
          • Fusicoceras (M.Dev) NY
          • Geisonoceroides (M.Dev-U.Dev) NY
          • Palmeroceras (M.Dev) NY
          • Petryoceras (U.Dev) NY
          • Sceptrites (M.Dev) Ohio-NY
    • Order Oncocerida (M.Ord.-Miss.)
      • Family Acleistoceratidae (M.Sil.,M.Dev.)
        • Subfamily - none
          • Acleistoceras (IA,Mich,Ohio) Middle Devonian
          • Gonatocyrtoceras (Ill,Eu) Middle Devonian
          • Paracleistoceras (N.Am?) Middle Devonian
          • Poteriocerina (Man,NY,Mich) Middle Devonian
          • ?Tumidoceras (Mich) Middle Devonian
      • Family Breviococeratidae (M.Sil.-U.Dev)
        • Subfamily - none
          • Anglicornus (PA,NY) Upper Devonian
          • Blastocerina(PA) Upper Devonian
          • Verticoceras (IA,NY) Middle-Upper Devonian
          • Breviococeras (NY, Mich, IA, Ont) Middle Devonian
          • Aletoceras (NY) Middle Devonian
          • Eleusoceras (NY) Middle Devonian
          • Exocyrtoceras (NY,Ohio,Mich,Ont) Middle Devonian
          • Gonionoedyceras (USA) Middle Devonian
          • Gyronaedyceras (IA,NY, Wis) Middle Devonian
          • Micronoceras (NY,Ohio,Ind) Middle Devonian
          • Maecyceras (NY,Wis,Ohio) Middle Devonian
          • Ovoceras (NY,Ind) Middle Devonian
          • Stereotoceras (N.Am) Middle Devonian
          • Wissenbachia (NY) Middle Devonian
    • Order Nautilida
      • Family Centroceratidae
        • Subfamily - none
          • Carlloceras (N.Am) Upper Devonian
          • Centroceras (IA,NY,Ohio,Can) Middle Devonian
          • Homaloceras (Can) (M.Dev)
      • Family Konickioceratidae(U.Dev-Miss)
        • Subfamily - none
          • Tylodiscoceras n.sp. (IA) (U.Dev)