Texanites

Texanites kawasakii, copyright Daderot.

Belongs within: Collignoniceratidae.

Texanites is an Upper Cretaceous (Upper Coniacian to Lower Campanian) genus of large ammonites (Wright et al. 1996).

Characters (from Wright et al. 1996): Generally large, compressed, and high-whorled, with sides flat on inner part, then converging to narrow venter with entire keel, ocassionally subquadrate; ribs dense, strong, straight or slightly flexuous, first with 3 then with 5 or 6 tubercles; intercalated ribs rare. Associated with spinaptychi.

<==Texanites Spath 1932EK02
    |  i. s.: T. americanusK79
    |         T. campaniensisP93
    |         T. hourcqiK79
    |         T. olivetiK79
    |         T. pseudotexanusK79
    |         T. shiloensisK79
    |         T. stangeriK79
    |           |--T. s. stangeriK79
    |           `--T. s. densicostusK79
    |--T. (Texanites) [incl. Neoselwynoceras Collignon 1966]WCH96
    |    |--*T. (T.) texanus (Roemer 1852) [=Ammonites texanus]WCH96
    |    |    |--T. t. texanusK79
    |    |    |--T. t. gallicusK79
    |    |    `--T. t. hispanicaWCH96
    |    `--*Neoselwynoceras’ paradoxum Collignon 1966WCH96
    |--T. (Eutexanites Klinger & Kennedy 1980)WCH96
    |    `--T. (*E.) sextuberculatus (Klinger & Kennedy 1980) [=Plesiotexanites (*E.) sextuberculatus]WCH96
    `--T. (Plesiotexanites Matsumoto 1970)WCH96
         `--T. (*P.) kawasakii (Kawada 1929) [=Mortoniceras kawasakii]WCH96

*Type species of generic name indicated

References

[EK02] Engeser, T., & H. Keupp. 2002. Phylogeny of the aptychi-possessing Neoammonoidea (Aptychophora nov., Cephalopoda). Lethaia 35: 79–96.

[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).

[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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