Puzosia planulata, from Wright et al. (1996).

Belongs within: Pachydiscidae.

Puzosia is a Cretaceous (Upper Aptian or Lower Albian to Upper Campanian) genus of often large ammonites (Wright et al. 1996).

Characters (from Wright et al. 1996): Macroconchs large but only microconchs and nuclei known of most species. Whorl section round to compressed; fine ribs and constrictions, parallel to ribs, generally present. In general more evolute than Melchiorites, with more linguiform projection of constrictions on venter and more complex suture with more strongly retracted suspensive lobe.

<==Puzosia Bayle 1878 [incl. Pleuropachydiscus Hyatt 1900, Puzosiella Egoian 1969]WCH96
    |  i. s.: P. hoffmanni (Gabb 1864)MR77 (see below for synonymy)
    |         P. matheroniK79
    |         *Puzosiella’ minuta Egoian 1969WCH96
    |         P. saintoursi Collignon 1963KK08
    |         P. subquadrata (Anderson 1902) [=Desmoceras subquadrata]MR77
    |--P. (Puzosia) [incl. Hyperpuzosia Matsumoto 1988, Matsumotoceras Hoepen 1968]WCH96
    |    |--*P. (P.) planulata (Sowerby 1827) [=Ammonites planulatus]WCH96
    |    |--*Matsumotoceras’ donlisteri Hoepen 1968WCH96
    |    `--P. (P.) tamon (Matsumoto 1988) [=*Hyperpuzosia tamon]WCH96
    |--P. (Anapuzosia Matsumoto 1954)WCH96
    |    `--P. (*A.) buenaventura Anderson 1938WCH96
    |--P. (Bhimaites Matsumoto 1954)WCH96
    |    `--P. (*B.) bhima (Stoliczka 1865) [=Ammonites bhima]WCH96
    `--P. (Mesopuzosia Matsumoto 1954) [incl. Pteropuzosia Matsumoto 1988]WCH96
         |--P. (*M.) pacifica (Matsumoto 1954) [=*Mesopuzosia pacifica]WCH96
         |--*Pteropuzosia’ kawashitai Matsumoto 1988WCH96
         `--P. (M.) yubarensisWCH96

Puzosia hoffmanni (Gabb 1864)MR77 [=Ammonites hoffmanniMR77, Desmoceras hoffmanniMR77, *Pleuropachydiscus hoffmanniWCH96, D. dilleri Anderson 1902MR77, Puzosia dilleriMR77]

*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).

[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.

[MR77] Murphy, M. A., & P. U. Rodda. 1977. The type specimens of Ammonites hoffmanni Gabb and Melchiorites indigenes Anderson (Cretaceous: Ammonoidea). Veliger 20 (2): 78–81.

[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 *