Oxytropidoceras acutocarinatum, from Cretaceous Atlas of Ancient Life.

Belongs within: Brancoceratidae.

The Mojsisovicziinae are Lower Cretaceous (Albian) ammonites in which a keel is developed as an adult feature, though it may disappear later in ontogeny, and ribs are more or less differentiated (Wright et al. 1996).

<==Mojsisovicziinae [Cechenoceratidae, Dipoloceratidae, Drepanoceratidae, Mojsisovicziidae]WCH96
    |--Falloticeras Parona & Bonarelli 1897WCH96
    |    `--*F. proteus (Orbigny 1842) [=Ammonites proteus]WCH96
    |--Menuthengonoceras Collignon 1963WCH96
    |    `--*M. komihevitraense Collignon 1963WCH96
    |--Mojsisoviczia Steinmann 1881 [incl. Dipoloceroides Breistroffer 1947]WCH96
    |    |--M. ventanillensis (Gabb 1869) [=Ammonites ventanillensis; incl. *M. duerfeldi Steinmann 1881]WCH96
    |    `--M. delaruei (Orbigny 1841) [=Ammonites delaruei, *Dipoloceroides delaruei]WCH96
    |--Dipoloceras Hyatt 1900WCH96
    |    |  i. s.: D. bouchardianumP93
    |    |         D. pseudaonP93
    |    |--D. (Dipoloceras) [incl. Cechenoceras Hoepen 1941]WCH96
    |    |    |--*D. (D.) cristatum (Brongniart in Cuvier & Brongniart 1822) [=Ammonites cristatus]WCH96
    |    |    `--*Cechenoceras’ reversum Hoepen 1941WCH96
    |    `--D. (Rhytidoceras Hoepen 1931) (see below for synonymy)WCH96
    |         |--D. (*R.) elegans (Hoepen 1931) [=*Rhytidoceras elegans]WCH96
    |         |--*Diplasioceras’ fallax Hoepen 1946WCH96
    |         |--*Ricnoceras’ pandai Hoepen 1941WCH96
    |         |--‘Mortoniceras’ rigidum Spath 1933 [=*Mortoniceratoides rigidus]WCH96
    |         `--*Euspectroceras’ strigile Hoepen 1946WCH96
    `--Oxytropidoceras Stieler 1920 [=Pseudophacoceras Spath 1921]WCH96
         |  i. s.: O. alticarinatum Spath 1922KK08
         |--O. (Oxytropidoceras) [incl. Manuaniceras Spath 1925]WCH96
         |    |--*O. (O.) roissyanum (Orbigny 1841) [=Ammonites roissyanus, *Pseudophacoceras roissyanum]WCH96
         |    `--O. (O.) manuanense (Spath 1921) [=Pseudophacoceras manuanense, *Manuaniceras manuanense]WCH96
         |--O. (Adkinsites Spath 1931) [incl. Androiavites Collignon 1936]WCH96
         |    |--O. (*A.) belknapi (Marcou 1858) [=Ammonites belknapi]WCH96
         |    |--O. (*Androiavites’) besairiei Collignon 1936WCH96
         |    `--O. (A.) bravoenseWCH96
         |--O. (Benavidesites Cooper 1982)WCH96
         |    |--O. (*B.) harrisoni (Benavides-Cáceres 1956) [=Venezoliceras harrisoni]WCH96
         |    `--O. (B.) acutocarinatumWCH96
         |--O. (Laraiceras Renz 1968)WCH96
         |    `--O. (*L.) laraense Renz 1968WCH96
         |--O. (Mirapelia Cooper 1982)WCH96
         |    `--O. (*M.) mirapelianum (Orbigny 1850) [=Ammonites mirapelianum]WCH96
         `--O. (Venezoliceras Spath 1925) [incl. Lophoceras Hoepen 1931 non Hyatt 1893, Tarfayites Collignon 1967]WCH96
              |--O. (*V.) venezolanum Stieler 1920WCH96
              |--O. (*Tarfayites’) bituberculatum Collignon 1967WCH96
              `--*Lophoceras’ umsinense Hoepen 1931WCH96

Dipoloceras (Rhytidoceras Hoepen 1931) [incl. Diplasioceras Hoepen 1946, Euspectroceras Hoepen 1946, Mortoniceratoides Cooper 1982, Ricnoceras Hoepen 1941]WCH96

*Type species of generic name indicated


[KK08] Kennedy, W. J., & H. C. Klinger. 2008. Cretaceous faunas from Zululand and Natal, South Africa. The ammonite subfamily Lyelliceratinae Spath, 1921. African Natural History 4: 57–111.

[P93] Page, K. N. 1993. Mollusca: Cephalopoda (Ammonoidea: Phylloceratina, Lytoceratina, Ammonitina and Ancyloceratina). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 213–227. Chapman & Hall: London.

[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).

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