Kossmaticeras theobaldianum, from Wright et al. (1996).

Belongs within: Pachydiscidae.

The Kossmaticeratidae are a Cretaceous (Upper Aptian or Lower Albian to Upper Maastrichtian) lineage of ammonites (Wright et al. 1996).

Characters (from Wright et al. 1996): Compressed to inflated, rather involute to evolute, with fine to coarse, radial or prorsiradiate ribs interrupted on venter or not; ribs typically truncated by still more oblique constrictions; tubercles present or not. Microconchs lappeted.

    |    |--Marshallites Matsumoto 1955WCH96
    |    |    `--*M. compressus Matsumoto 1955WCH96
    |    |--Hulenites Matsumoto 1955WCH96
    |    |    `--*H. reesidei (Anderson 1938) [=Puzosia reesidei]WCH96
    |    |--Eomarshallites Medina & Rinaldi 1986WCH96
    |    |    `--*E. espinosum Medina & Rinaldi 1986WCH96
    |    |--Yeharites Mtsumoto 1991WCH96
    |    |    `--*Y. kobayashii Matsumoto & Takahashi in Matsumoto 1991WCH96
    |    |--Yakushiceras Matsumoto 1991WCH96
    |    |    `--*Y. takahashii Matsumoto 1991WCH96
    |    |--Maccarthyites Matsumoto 1959WCH96
    |    |    `--*M. gracilis Matsumoto 1959WCH96
    |    |--Protokossmaticeras Collignon 1964WCH96
    |    |    `--*P. madagascariense Collignon 1964WCH96
    |    |--Holcodiscoides Spath 1922WCH96
    |    |    `--*H. cliveanus (Stoliczka 1866) [=Ammonites cliveanus]WCH96
    |    |--Moffitites Imlay 1959WCH96
    |    |    `--*M. robustus Imlay 1959WCH96
    |    |--Mikasaites Matsumoto 1956WCH96
    |    |    `--*M. orbicularis Matsumoto 1956WCH96
    |    |--Eomadrasites Matsumoto 1955WCH96
    |    |    `--*E. nipponicus Matsumoto 1955WCH96
    |    |--Eogunnarites Wright & Matsumoto 1954 [incl. Sounnaites Matsumoto & Inoma in Matsumoto 1991]WCH96
    |    |    |--*E. unicus (Yabe 1904) [=Olcostephanus unicus]WCH96
    |    |    `--E. alaskensis Matsumoto 1959 [=*Sounnaites alaskensis]WCH96
    |    `--Wellmanites Wright 1957WCH96
    |         |--*W. zelandicus Wright 1957WCH96
    |         `--W. japonicusWCH96
    `--Kossmaticeratinae [Brahmaitinae]WCH96
         |--Yokoyamaoceras Wright & Matsumoto 1954WCH96
         |    `--*Y. kotoi (Jimbo 1894) [=Holcodiscus kotoi]WCH96
         |--Grossouvreites Kilian & Reboul 1909WCH96
         |    `--*G. gemmatus (Hupé 1854) [=Ammonites gemmatus]WCH96
         |--Gunnarites Kilian & Reboul 1909WCH96
         |    `--*G. antarcticus (Weller 1903) [=Olcostephanus antarcticus]WCH96
         |--Neograhamites Spath 1953WCH96
         |    `--*N. kiliani Spath 1953WCH96
         |--Pseudokossmaticeras Spath 1922WCH96
         |    |--*P. pacificum (Stoliczka 1866) [=Ammonites pacificus]WCH96
         |    `--P. tercenseCP02
         |--Maorites Marshall 1926WCH96
         |    |  i. s.: M. densicostatusP93
         |    |--*M. (Maorites) tenuicostatum (Marshall 1917) [=Kossmaticeras tenuicostatum]WCH96
         |    `--M. (Caledonites Collignon 1977)WCH96
         |         `--M. (*C.) neocaledonicus (Collignon 1977) [=*Caledonites neocaledonicus]WCH96
         |--Brahmaites Kossmat 1897 [incl. Anabrahmaites Yabe & Shimizu 1924, Subbrahmaites Yabe & Shimizu 1924]WCH96
         |    |--*B. brahma (Forbes 1846) [=Ammonites brahma]WCH96
         |    |--B. haugiW69
         |    |--*Subbrahmaites’ sachalinensis Yabe & Shimizu 1924WCH96
         |    `--‘Ammonites’ vishnu Forbes 1846 [=*Anabrahmaites vishnu]WCH96
         |--Jacobites Kilian & Reboul 1909WCH96
         |    |--J. (Jacobites) [incl. Aucklandites Marshall 1927, Neomadrasites Marshall 1926]WCH96
         |    |    |--*J. (J.) anderssoni Kilian & Reboul 1909WCH96
         |    |    |--J. (J.) nodulosus (Marshall 1926) [=*Neomadrasites nodulosus]WCH96
         |    |    `--‘Acanthoceras’ ultimum Marshall 1926 [=*Aucklandites ultimus]WCH96
         |    `--J. (Tainuia Marshall 1926)WCH96
         |         `--J. (*T.) aucklandica (Marshall 1926) [=*Tainuia aucklandica]WCH96
         `--Kossmaticeras Grossouvre 1901 (see below for synonymy)WCH96
              |  i. s.: ‘Madrasites’ similisM08
              |--*K. (Kossmaticeras) theobaldianum (Stoliczka 1866) [=Ammonites theobaldianus, *Madrasites theobaldianus]WCH96
              |--K. (Karapadites Collignon 1954)WCH96
              |    `--K. (*K.) karapadense (Kossmat 1897) [=Holcodiscus karapadensis]WCH96
              `--K. (Natalites Collignon 1954) [incl. Kaiparaites Matsumoto 1955]WCH96
                   |--K. (N.) africanus (Hoepen 1920) (see below for synonymy)WCH96
                   |--K. (N.) brunnschweileriBRW98
                   `--‘Madrasites’ multicostatus Marshall 1926 [=*Kaiparaites multicostatus]WCH96

Kossmaticeras Grossouvre 1901 [=Madrasites Kilian & Reboul 1909; incl. Pseudoholcodiscus Kilian & Reboul 1909 (n. n.)]WCH96

Kossmaticeras (Natalites) africanus (Hoepen 1920) [=Holcodiscus africanus; incl. Madrasites natalensis Spath 1922, *Natalites natalensis]WCH96

*Type species of generic name indicated


[BRW98] Beesley, P. L., G. J. B. Ross & A. Wells (eds) 1998. Fauna of Australia vol. 5. Mollusca: The Southern Synthesis. Part A. Australian Biological Resources Study: Canberra.

[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.

[M08] McMillan, I. K. 2008. Reappraisal of foraminiferal assemblages of the Santonian–Campanian Mzamba Formation type section, and their correlation with the stratigraphic succession of the KwaZulu Basin. African Natural History 4: 25–34.

[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.

[W69] Wiedmann, J. 1969. The heteromorphs and ammonoid extinction. Biological Reviews 44: 563–602.

[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 *