Assemblage of Deshayesites deshayesi, copyright David Hill.

Belongs within: Ancyloceratidae.

The Deshayesitidae are a Lower Cretaceous group of more or less compressed, strongly ribbed ammonites (Wright et al. 1996).

Characters (from Wright et al. 1996): Typically compressed; ribs strong, branching or long and short, crossing rounded venter or, in later forms with flat venter, may be interrupted; tubercles occasionally present. Suture with first subdivision of umbilical lobe remaining next to saddle U/L, giving formula I U2 U3 U1 L E.

    |--Mathoceratinae [Venezuellinae]WCH96
    |    |--Cloioceras Whitehouse 1927WCH96
    |    |    `--*C. ruspolii (Mayer-Eymar 1893) [=Hoplites ruspolii]WCH96
    |    |--Somalites Tavani 1949WCH96
    |    |    `--*S. vertebralis Tavani 1949WCH96
    |    `--Mathoceras [incl. Renziella Kvantaliani 1980, Venezuella Kvantaliani 1980]WCH96
    |         |--*M. matho (Pervinquière 1907) [=Hoplites (Kilianella) matho]WCH96
    |         |--M. laeve Renz 1978 [=*Renziella laevis]WCH96
    |         `--M. venezolanum Renz 1978 [=*Venezuella venezolana]WCH96
         |--Turkmeniceras Tovbina 1962WCH96
         |    `--*T. turkmenicum Tovbina 1962WCH96
         |--Neodeshayesites Casey 1964WCH96
         |    `--*N. stutzeri (Riedel 1938) [=Deshayesites stutzeri]WCH96
         |--Kuntziella Collignon 1962WCH96
         |    `--*K. kuntzi (Collignon 1962) [=Deshayesites (*Kuntziella) kuntzi]WCH96
         |--Burckhardtites Humphrey 1949WCH96
         |    `--*B. nazasensis (Burckhardt 1925) [=Neocomites nazasensis]WCH96
         |--Prodeshayesites Casey 1961 [incl. Paradeshayesites Kemper 1967WCH96
         |    |--*P. fissicostatus (Phillips 1829) [=Ammonites fissicostatus]WCH96
         |    `--P. laeviusculus (Koenen 1902) [=Hoplitides laeviusculus, *Paradeshayesites laeviusculus]WCH96
         |--Dufrenoyia Kilian & Reboul 1915 (see below for synonymy)WCH96
         |    |--*D. furcata (Sowerby in Fitton 1836) [=Ammonites furcatus]WCH96
         |    |--D. dufrenoyi (Orbigny 1840) [=Ammonites dufrenoyi, *Stenhoplites dufrenoyi]WCH96
         |    `--D. juandurhami Etayo Serna 1979 [=D. (*Juandurhamiceras) juandurhami]WCH96
         `--Deshayesites Kazansky 1914 [=Parahoplitoides Spath 1922]WCH96
              |--*D. deshayesi (Orbigny 1840) [=Ammonites deshayesi, *Parahoplitoides deshayesi]WCH96
              |--D. callidiscusK79
              |--D. fittoniK79
              |--D. forbesiWCH96
              |--D. grandisK79
              |--D. kilianiK79
              |--D. tuarkyricusWCH96
              `--D. weissiWCH96

Dufrenoyia Kilian & Reboul 1915 [=Dufrenoya; incl. Juandurhamiceras Etayo Serna 1979, Stenhoplites Spath 1922]WCH96

*Type species of generic name indicated


[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).

[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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