Nostoceras polyplocum, copyright H. Zell.

Belongs within: Turrilitaceae.

The Nostoceratidae are a lineage of heteromorphic ammonites known from the Turonian to Maastrichtian of the Upper Cretaceous (Wright et al. 1996).

Characters (from Wright et al. 1996): Helicoid forms with coiling commonly irregular in early or late stages or both or throughout. Ribs prominent, with or without tubercles; constrictions common. Suture normally florid.

<==Nostoceratidae (see below for synonymy)WCH96
    |--Didymoceratoides Kennedy & Cobban 1993WCH96
    |    `--*D. binodosum Kennedy & Cobban 1993WCH96
    |--Nipponites Yabe 1904WCH96
    |    |--*N. mirabilis Yabe 1904WCH96
    |    `--N. occidentalisK81
    |--Muramotoceras Matsumoto 1977WCH96
    |    `--*M. yezoense Matsumoto 1977WCH96
    |--Tridentoceras Wiedmann 1962WCH96
    |    `--*T. tridens (Schlüter 1876) [=Turrilites tridens]WCH96
    |--Pravitoceras Yabe 1902WCH96
    |    `--*P. sigmoidale Yabe 1902WCH96
    |--Hyphantoceras Hyatt 1900 (see below for synonymy)WCH96
    |    |  i. s.: *Euhypantoceras’ maestrichtiense Shimizu 1935WCH96
    |    |         ‘Heteroceras’ orientale Yabe 1904 [=*Orientoceras orientale]WCH96
    |    |         *Ankinatsytes’ yabei Collignon 1965WCH96
    |    |--*H. (Hyphantoceras) reussianum (Orbigny 1850) [=Heteroceras reussianum, Hy. roissyanum (l. c.)]WCH96
    |    `--H. (Madagascarites Collignon 1966)WCH96
    |         `--H. (*M.) andimakensis (Collignon 1966) [=*Madagascarites andimakensis]WCH96
    |--Jouaniceras Basse 1939WCH96
    |    |--*J. (Jouaniceras) sicardi (Grossouvre 1894) [=Heteroceras sicardi]WCH96
    |    `--J. (Ainoceras Matsumoto in Matsumoto & Kanie 1967)WCH96
    |         `--J. (*A.) kamuy (Matsumoto in Matsumoto & Kanie 1967) [=*Ainoceras kamuy]WCH96
    `--Nostoceras Hyatt 1894WCH96
         |  i. s.: N. ellipticumK79
         |         N. hyattiC02
         |         N. obtusumK79
         |         N. pozaryskiiCP02
         |--N. (Nostoceras) approximans (Conrad 1856) [=Ancyloceras approximans; incl. *N. stantoni Hyatt 1894]WCH96
         |--N. (Anaklinoceras Stephenson 1941)WCH96
         |    `--N. (*A.) reflexum Stephenson 1941WCH96
         |--N. (Bostrychoceras Hyatt 1900) [incl. Mobergoceras Schmid & Ernst 1975]WCH96
         |    |--N. (*B.) polyplocum (Roemer 1841) [=Turrilites polyplocus]WCH96
         |    `--‘Turrilites’ junior Moberg 1885 [=*Mobergoceras junior]WCH96
         |--N. (Eubostrychoceras Matsumoto 1967)WCH96
         |    `--N. (*E.) indopacificum (Matsumoto 1967) [=*Eubostrychoceras indopacificum]WCH96
         |--N. (Didymoceras Hyatt 1894) [incl. Cirroceras Conrad 1868 (n. d.), Emperoceras Hyatt 1894]WCH96
         |    |--N. (*D.) nebrascense (Meek & Hayden 1857) [=Ancyloceras nebrascense]WCH96
         |    |--*Emperoceras’ beecheri Hyatt 1894WCH96
         |    |--‘Ammonceratites’ conradi Morton 1843 (n. d.) [=*Cirroceras conradi]WCH96
         |    |--‘Didymoceras’ dohezianumCP02
         |    `--‘Didymoceras’ stevensoniK79
         |--N. (Planostoceras Lewy 1967)WCH96
         |    `--N. (*P.) rehavami Lewy 1967WCH96
         `--N. (Yezoceras Matsumoto 1977)WCH96
              `--N. (*Y.) nodosum (Matsumoto 1977) [=*Yezoceras nodosum]WCH96

Hyphantoceras Hyatt 1900 [incl. Ankinatsytes Collignon 1965, Euhyphantoceras Shimizu 1935, Orientoceras Shimizu 1935]WCH96

Nostoceratidae [Bostrychoceratinae, Emperoceratinae, Hyphantoceratinae, Jouaniceratidae, Nostoceratinae, Proavitoceratinae]WCH96

*Type species of generic name indicated


[C02] Christensen, W. K. 2002. Fusiteuthis polonica, a rare and unusual belemnite from the Maastrichtian. Acta Palaeontologica Polonica 47: 679–683.

[CP02] Christopher, R. A., & D. C. Prowell. 2002. A palynological biozonation for the Maastrichtian stage (Upper Cretaceous) of South Carolina, USA. Cretaceous Research 23: 639–669.

[K79] Kauffman, E. G. 1979. Cretaceous. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A418–A487. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[K81] Klinger, H. C. 1981. Speculation on buoyancy control and ecology in some heteromorph ammonites. In: House, M. R., & J. R. Senior (eds) The Ammonoidea: The evolution, classification, mode of life and geological usefulness of a major fossil group pp. 337–355. Academic Press.

[WCH96] Wright, C. W., J. H. Calloman & M. K. Howarth. 1996. Treatise on Invertebrate Paleontology pt L. Mollusca 4, revised vol. 4. Cretaceous Ammonoidea. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

Leave a comment

Your email address will not be published. Required fields are marked *