Devonian/Ordovician Nautiloid Fossils of North America

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 of this page.

Class Cephalopoda

Subclass Actinoceratoidea

Order Ascocerida

Subclass Nautiloidea

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 Geisonoceratidae (M.Ord.-M.Dev.)
    • Protokionoceras (M.Ord-M.Dev) Ill,Ind,Me,Mich,MY,?Pa,Wis, Anticosti,Que,Ont
    • Striacoceras (M.Dev) NY
  • Family Dawsonocratidae (Ord.,L.SIl.-U.Sil.,?M.Dev.)
    • Dawsonoceras (?M.Dev) Ontario
  • Family Offleyoceratidae (M.Sil.,?L.Dev.,?M.Dev.)
    • Offleyoceras (?L.Dev,?M.Dev) Arctic
  • 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
    • Subfamily Cayutoceratinae (L.Sil-Dev)
      • Cayutoceras (U.Dev) NY
      • Bradfordoceras (U.Dev) Pa
    • Subfamily Pseudactinoceratinae (U.Dev-L.Carb)
      • Macroloxoceras (U.Dev) Colo-N.Mex

    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
    • Family Archiacoceratidae (Dev.)
    • Family Karoceratidae (L.Sil.-M.Sil.,?L.Dev)
    • Family Poterioceratidae (L.Dev.-Miss.)
    • Family Polyerlasmoceratidae (M.Sil.-U.Dev.)
    • Family Hemiphragmoceratidae (M.Sil.-U.Sil.,?M.Dev.)
    • Family Jovellaniidae (?U.Ord.,M.Sil-L.Dev.)
    • Family Nothoceratidae (Sil.-U.Dev)
    • Family Tripleuroceratidae (?L.Dev.,M.Dev.-Miss.)

    Order Discosorida

    • Family discosoridae (M.Sil-M.Dev,?U.Dev.)
    • Family Phragmoceratidae (M.Sil-L.Dev)

    Order Barrandeocerida(M.Ord-M.Dev)
    • Family Barrandeoceratidae(M.Ord-M.Dev)
    • Family Nephriticeritidae(L.Dev-U.Dev)

    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 6, 2001
    By C. Newsom
    charles-newsom@uiowa.edu