Brancoceras senequieri, from Wright et al. (1996).

Belongs within: Brancoceratoidea.
Contains: Mojsisovicziinae, Mortoniceratinae.

The Brancoceratidae are a Cretaceous (Lower Albian to Lower Cenomanian) lineage of ammonites, typically with strongly ribbed shells (Wright et al. 1996).

Characters (from Wright et al. 1996): Typically rather evolute, with round, oval, or quadrate whorl section, ventral keel, strong ribs, and at least umbilical tubercles. Many genera with spiral striations or notches on ribs.

<==Brancoceratidae [Hystatoceratidae]
    |  `--MortoniceratinaeWCH96
    `--Brancoceratinae [Erioliceratidae]WCH96
         |  i. s.: Hysteroceras Hyatt 1900 (see below for synonymy)WCH96
         |           |--*H. varicosum (Sowerby 1824) [=Ammonites varicosus]WCH96
         |           |--*Komeceras’ acuticostatum Hoepen 1944WCH96
         |           |--H. antipodeum (Etheridge 1902) [=Hystrichoceras antipodeum, *Spathiceras antipodeum]WCH96
         |           |--*Terascoceras’ cariniferum Hoepen 1944WCH96
         |           |--*Askoloboceras’ fastigatum Hoepen 1944WCH96
         |           `--*Petinoceras’ recuperator Hoepen 1944WCH96
         |         Erioliceras Hoepen 1955 (see below for synonymy)WCH96
         |           |--*E. tenuis Hoepen 1955WCH96
         |           |--*Omocyrtoceras’ errabundum Hoepen 1955WCH96
         |           `--*Tetragonoceras’ robustum Hoepen 1955WCH96
         |         Neokentroceras Spath 1921WCH96
         |           `--*N. curvicornu Spath 1922WCH96
         |--Brancoceras Steinmann 1881KK08, WCH96 (see below for synonymy)
         |    |--*B. senequieri (Orbigny 1841) [=Ammonites senequieri, *Hystatoceras senequieri]WCH96
         |    |--B. alternatum Kennedy 2004KK08
         |    |--B. carinatum Collignon 1949 [=*Paroxytropidoceras carinatum]WCH96
         |    |--B. ixion [=Goniatites ixion]H84
         |    |--B. lineare [=Goniatites linearis]H84
         |    |--B. ovatum [=Goniatites ovatus]H84
         |    |--B. rotatorium [=Goniatites rotatorius]H84
         |    |--B. subsulcatum [=Goniatites subsulcatus]H84
         |    |--B. sulcatum [=Goniatites sulcatus]H84
         |    |--B. umbilicatumH84
         |    `--B. ungeri [=Goniatites ungeri]H84
         `--+--Parabrancoceras Breistroffer 1951KK08
            |    |--*P. besairiei (Collignon 1949) [=Brancoceras besairiei]WCH96
            |    `--P. dromenseKK08
            `--Prolyelliceras Spath 1930 [incl. Ralphimlayites Etayo-Serna 1979]KK08
                 |  i. s.: P. alternatum (Robert 2002) [=Ralphimlayites alternatum, R. alternum Robert 2001 (n. n.)]KK08
                 |         ‘Ralphimlayites’ apuloense Etayo-Serna 1979KK08
                 |         P. flandrini (Dubourdieu 1953) [=Lyelliceras flandrini]KK08
                 |         P. radenaci (Pervinquière 1907) [=Prionotropis radenaci]KK08
                 |--P. cotteri (Spath 1930) [=Lyelliceras cotteri]KK08
                 |--P. lobatum (Riedel 1938)KK08
                 `--+--P. prorsocurvatum (Gerhardt 1897) (see below for synonymy)KK08
                    `--+--+--‘Lyelliceras’ isacleiKK08
                       |  `--P. ulrichi (Knechtel 1947) [=Lyelliceras ulrichi, Ralphimlayites ulrichi]KK08
                       `--+--P. mathewsi (Knechtel 1947) [=Lyelliceras mathewsi, Ralphimlayites mathewsi]KK08
                          `--Eubrancoceras Breistroffer 1951KK08, WCH96 [incl. Rinconiceras Etayo Serna 1979WCH96]
                               |--*E. aegoceratoides (Steinmann 1881) [=Brancoceras aegoceratoides]WCH96
                               `--*Rinconiceras’ rinconi Etayo Serna 1979WCH96

Brancoceras Steinmann 1881KK08, WCH96 [=Hystatoceras Hyatt 1900WCH96; incl. Paroxytropidoceras Breistroffer 1951 (n. n.)WCH96]

Erioliceras Hoepen 1955 [incl. Omocyrtoceras Hoepen 1955, Tetragonoceras Hoepen 1955 non Whiteaves 1891]WCH96

Hysteroceras Hyatt 1900 [incl. Askoloboceras Hoepen 1944, Komeceras Hoepen 1944, Petinoceras Hoepen 1944, Spathiceras Whitehouse 1927, Terascoceras Hoepen 1944]WCH96

Prolyelliceras prorsocurvatum (Gerhardt 1897) [=Acanthoceras prorsocurvatum, *Ralphimlayites prorsocurvatum; incl. *Prolyelliceras peruvianum Spath 1930]KK08

*Type species of generic name indicated


[H84] Hyatt, A. 1883–1884. Genera of fossil cephalopods. Boston Soc. Nat. History, Proc. 22: 253–338.

[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.

[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 *