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)

Order Barrandeoceratida (M. Ord-M. Dev)
  • Family Apsidoceratidae (M. Ord-U. Ord)
    • 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
    • Endoceras (U. Ord) IA,IL,WI
    • "Cyclendoceras" (U. Ord) IA, IL, WI
    • Cyptendoceras (L. Ord) MO

Order Orthocerida (L.Ord-U.Trias.)
  • Family Orthoceratidae (Ord.-U.Trias.)
    •
    • Subfamily Michelinoceratinae
    • 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.)
    • 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)
    • 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
    • Carlloceras (N.Am) Upper Devonian
    • Centroceras (IA,NY,Ohio,Can) Middle Devonian
    • Homaloceras (Can) (M.Dev)
  • Family Konickioceratidae(U.Dev-Miss)
    • Tylodiscoceras n.sp. (IA) (U.Dev)
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Last updated: March 8, 2005
By C. Newsom
charles-newsom@uiowa.edu