Acanthoceras rhotomagense, copyright Hectonichus.

Belongs within: Acanthoceratoidea.
Contains: Calycoceras, Euomphaloceratinae, Collignoniceratidae, Sphenodiscidae, Mammitinae.

The Acanthoceratidae are an Upper Cretaceous (Lower Cenomanian to Coniacian) assemblage of typically evolute, tuberculate ammonites (Wright et al. 1996).

Characters (from Wright et al. 1996): Strong tuberculation, at least umbilical and ventrolateral, in most genera; in some, however, ribs dominant, while in others, ornament may be weak or absent on outer whorls. Most genera evolute. Whorl section ranging from compressed to very depressed. Dimorphic in size only, with no apertural modification in microconchs. Suture with few special characteristics or variations, though in some later genera sutural detail tending to simplify.

    |--Mantelliceratinae [Mantelliceratidae, Utaturiceratinae]WCH96
    |    |--Utaturiceras Wright 1956WCH96
    |    |    `--*U. vicinale (Stoliczka 1864) [=Ammonites vicinale]WCH96
    |    |--Mhriliceras Kennedy & Wright 1985WCH96
    |    |    `--*M. lapparenti (Pervinquière 1907) [=Mammites lapparenti]WCH96
    |    |--Graysonites Young 1958WCH96
    |    |    |--*G. lozoi Young 1958WCH96
    |    |    `--G. adkinsiP93
    |    |--Sharpeiceras Hyatt 1903 [incl. Tlahualiloceras Kellum & Mintz 1962]WCH96
    |    |    |--*S. laticlavium (Sharpe 1855) [=Ammonites laticlavius]WCH96
    |    |    `--*Tlahualiloceras’ tlahualiloense Kellum & Mintz 1962WCH96
    |    `--Mantelliceras Hyatt 1903 (see below for synonymy)WCH96
    |         |--*M. mantelli (Sowerby 1814) [=Ammonites mantelli]WCH96
    |         |    |--M. m. mantelliWCH96
    |         |    `--‘Ammonites’ m. tuberculata Mantell 1822 [=*Neomantelliceras tuberculatum]WCH96
    |         |--M. cantianum Spath 1926 [=*Bunburyiceras cantianum]WCH96
    |         |--‘Ammonites’ couloni Orbigny 1850 [=*Couloniceras couloni]WCH96
    |         |--M. dixoniWCH96
    |         |--M. picteti Hyatt 1903 [=*Promantelliceras picteti]WCH96
    |         `--M. saxbii [incl. M. martimpreyi]HK81
         |--Protacanthoceras Spath 1923WCH96
         |    `--*P. bunburianum (Sharpe 1853) [=Ammonites bunburianus]WCH96
         |--Conlinoceras Cobban & Scott 1972WCH96
         |    `--*C. gilberti (Cobban & Scott 1972) [=Calycoceras (*Conlinoceras) gilberti]WCH96
         |--Paraconlinoceras Kennedy & Cobban 1990WCH96
         |    `--*P. leonense (Adkins 1928) [=Eucalycoceras leonense]WCH96
         |--Plesiacanthoceratoides Kennedy & Cobban 1990WCH96
         |    `--*P. vetula (Cobban 1987) [=Protacanthoceras vetula]WCH96
         |--Paracompsoceras Cobban 1971WCH96
         |    `--*P. landisi Cobban 1971WCH96
         |--Kennediella Cooper 1979WCH96
         |    `--*K. inopinata (Kennedy & Bayliss 1977) [=Pseudotissotia inopinata]WCH96
         |--Kastanoceras Kennedy & Cobban 1990WCH96
         |    `--*K. spinigerum Kennedy & Cobban 1990WCH96
         |--Microsulcatoceras Kennedy & Cobban 1990WCH96
         |    `--*M. puzosiiforme Kennedy & Cobban 1990WCH96
         |--Alzadites Kennedy & Cobban 1990WCH96
         |    `--*A. alzadensis Kennedy & Cobban 1990WCH96
         |--Nebraskiceras Kennedy & Cobban 1988WCH96
         |    `--*N. haresiceratiforme Kennedy & Cobban 1988WCH96
         |--Quitmaniceras Powell 1963WCH96
         |    `--*Q. reaseri Powell 1963WCH96
         |--Prohauericeras Nowak 1913WCH96
         |    `--*P. goupilianum (Orbigny 1841) [=Ammonites goupilianus]WCH96
         |--Tunesites Pervinquière 1907 (n. d.)WCH96
         |    `--*T. salammbo Pervinquière 1907WCH96
         |--Pseudocalycoceras Thomel 1969 [incl. Neocalycoceras Thomel 1969 (n. n.)]WCH96
         |    `--*P. harpax (Stoliczka 1864) [=Ammonites harpax]WCH96
         |--Nigericeras Schneegans 1943WCH96
         |    |--‘Acanthoceras’ gaddeni Chudeau 1909 [incl. *Nigericeras gignouxi Schneegans 1943]WCH96
         |    `--N. scottiHK81
         |--Cunningtoniceras Collignon 1937 [incl. Guerangericeras Thomel 1972]WCH96
         |    |--*C. cunningtoni (Sharpe 1855) [=Ammonites cunningtoni]WCH96
         |    `--‘Ammonites’ confusus Guéranger 1867 [=*Guerangericeras confusus]WCH96
         |--Watinoceras Warren 1930 [=Arkhangelskiceras Il’in 1957]WCH96
         |    |--W. amudariense (Arkhangelsky 1916) [=Acanthoceras amudariense; incl. *W. reesidei Warren 1930]WCH96
         |    `--W. coloradoenseWCH96
         |--Benueites Reyment 1954WCH96
         |    |--*B. benueensis Reyment 1954WCH96
         |    `--B. spinosusWCH96
         |  `--EuomphaloceratinaeWCH96
         |--Eucalycoceras Spath 1923 [incl. Pseudomantelliceras Thomel 1972]WCH96
         |    |--*E. pentagonum (Jukes-Browne in Jukes-Browne & Hill 1896) [=Ammonites pentagonus]WCH96
         |    `--‘Acanthoceras (Mantelliceras)’ pervinquierei Collignon 1931 [=*Pseudomantelliceras pervinquierei]WCH96
         |--Acompsoceras Hyatt 1903 [incl. Pseudacompsoceras Spath 1925]WCH96
         |    |--A. renevieri (Sharpe 1857) (see below for synonymy)WCH96
         |    |--A. sarthacenseWCH96
         |    `--*Pseudacompsoceras’ vectense Spath 1925WCH96
         |--Tarrantoceras Stephenson 1955WCH96
         |    |--*T. (Tarrantoceras) sellardsi (Adkins 1928) (see below for synonymy)WCH96
         |    `--T. (Sumitomoceras Matsumoto in Matsumoto, Muramoto & Takahashi 1969)WCH96
         |         `--T. (*S.) faustum (Matsumoto in Matsumoto, Muramoto & Takahashi 1969) [=*Sumitomoceras faustum]WCH96
         |--Neocardioceras Spath 1926WCH96
         |    `--*N. juddii (Barrois & Guerne 1878) [=Ammonites juddii]WCH96
         |         |--N. j. juddiiWCH96
         |         `--N. j. barroisiWCH96
         |--+--Thomelites Wright & Kennedy in Juignet, Kennedy & Wright 1973WCH96
         |  |    `--*T. sornayi (Thomel in Porthault, Thomel & Villoutreys 1967) [=Jeanrogericeras sornayi]WCH96
         |  `--+--CollignoniceratidaeWCH96
         |     `--SphenodiscidaeWCH96
         |  `--Dunveganoceras Warren & Stelck 1940WCH96
         |       |--*D. (Dunveganoceras) albertense (Warren 1930) [=Acanthoceras albertense]WCH96
         |       |    |--D. a. albertenseWCH96
         |       |    `--D. a. montanenseWCH96
         |       `--D. (Plesiacanthoceras Haas 1964) [=Paracanthoceras Haas 1963 non Furon 1935]WCH96
         |            `--D. (*P.) wyomingense (Reagan 1924) [=Metoicoceras wyomingense, *Paracanthoceras wyomingense]WCH96
         `--Acanthoceras Neumayr 1875 [=Metacanthoplites Hyatt 1900; incl. Alternacanthoceras Marcinowski 1979]WCH96
              |--*A. rhotomagense (Brongniart in Cuvier & Brongniart 1822) (see below for synonymy)WCH96
              |--A. alvaradoenseK79
              |--A. amphibolumK79
              |--A. amudariensisA03
              |--A. beilenseK79
              |--A. jukesbrownei (Spath 1926) [=Protacanthoceras jukesbrownei, *Alternacanthoceras jukesbrownei]WCH96
              |--A. muldoonenseK79
              `--A. vicinaleK79

*Acanthoceras rhotomagense (Brongniart in Cuvier & Brongniart 1822) [=Ammonites rhotomagensis, *Metacanthoplites rhotomagensis]WCH96

Acompsoceras renevieri (Sharpe 1857) [=Ammonites renevieri; incl. Am. bochumensis Schlüter 1871, *Acompsoceras bochumense]WCH96

Mantelliceras Hyatt 1903 [incl. Bunburyiceras Thomel 1972, Couloniceras Busnardo 1966, Neomantelliceras Thomel 1972, Promantelliceras Thomel 1972]WCH96

*Tarrantoceras (Tarrantoceras) sellardsi (Adkins 1928) [=Mantelliceras sellardsi; incl. *T. rotatile Stephenson 1955]WCH96

*Type species of generic name indicated


[A03] Alifanov, V. R. 2003. Two new dinosaurs of the infraorder Neoceratopsia (Ornithischia) from the Upper Cretaceous of the Nemegt Depression, Mongolian People’s Republic. Paleontologicheskii Zhurnal 2003 (5): 77–88 (translated: Paleontological Journal 37 (5): 524–534.)

[HK81] Hancock, J. M., & W. J. Kennedy. 1981. Upper Cretaceous ammonite stratigraphy: some current problems. In: House, M. R., & J. R. Senior (eds) The Ammonoidea: The evolution, classification, mode of life and geological usefulness of a major fossil group pp. 531–553. Academic Press.

[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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