Stephanocerataceae

Iniskinites magniformis, from here.

Belongs within: Aptychophora.
Contains: Otoitidae, Sphaeroceratidae, Arctocephalitinae, Cadoceratinae, Stephanoceratidae, Perisphinctoidea, Scaphitidae, Turrilitaceae, Desmoceratoidea, Bochianitidae, Labeceratidae, Ancyloceratidae, Douvilleiceratidae.

The Stephanocerataceae are a Jurassic group of ammonites, the shells of which commonly show sharp ribbing. This group includes the heteromorphic families Spiroceratidae and Acuariceratidae, in which the shells were openly coiled or arcuate (Wiedmann 1969).

Characters (from Engeser & Keupp 2002): Sphaerocone, cadicone or oxycone conchs, generally with sharp ribbing. Suture line complex with well-developed lateral and umbilical lobe.

<==Stephanocerataceae
| i. s.: PraestriaptychusEK02
| Irianites Westermann & Getty 1970DCH81
| Subcollina Spath 1925DCH81
| `--S. yeovillensis Spath 1925DCH81
| Hemigarantia Spath 1928DCH81
|--+--OtoitidaeDCH81
| `--+--SphaeroceratidaeEK02
| `--CardioceratidaeDCH81
| | i. s.: BoreiocephalitesP87
| | Umaltites Sei & Kalacheva 1979P87
| |--ArctocephalitinaeDCH81
| `--+--CadoceratinaeDCH81
| `--Cardioceratinae [Quenstedtoceratinae]DCH81
| |--QuenstedtocerasH79
| |--Eboraciceras subordinarium Meledina 1977DCH81
| |--Amoeboceras (Nannocardioceras) anglicumDCH81, P93
| `--CardiocerasCDH04
| |--C. cordatum [=Ammonites cordatus]H04
| `--C. ovale (Quenstedt 1845) [=Ammonites alternans ovalis]CDH04
`--+--StephanoceratidaeDCH81
`--+--PerisphinctoideaDCH81
`--+--+--ScaphitidaeW69
| `--TurrilitaceaeEK02
`--+--DesmoceratoideaEK02
`--Ancylocerataceae [Protancylocerataceae]WCH96
|--BochianitidaeWCH96
|--LabeceratidaeWCH96
|--Hamulinidae [Anahamulinidae]WCH96
| |--Anahamulina Hyatt 1900WCH96
| | `--*A. subcylindrica (Orbigny 1850) [=Hamulina subcylindrica]WCH96
| `--Hamulina Orbigny 1850WCH96
| |--*H. astieriana Orbigny 1850WCH96
| `--H. silesiacaWCH96
|--Macroscaphitidae [Cicatritidae]WCH96
| |--Cicatrites Anthula 1899WCH96
| | `--*C. abichi Anthula 1899WCH96
| `--Macroscaphites Meek 1876 [incl. Costidiscus Uhlig 1882]WCH96
| |--*M. yvani (Puzos 1832) [=Scaphites yvani]WCH96
| |--M. recticostatus (Orbigny 1841) [=Ammonites recticostatus, *Costidiscus recticostatus]WCH96
| `--‘Costidiscus’ striatosulcatusK79
|--PtychoceratidaeWCH96
| |--Euptychoceras Breistroffer 1952 [incl. Pseudoptychoceras Etayo Serna 1979]WCH96
| | |--*E. meyrati (Ooster 1860) [=Ptychoceras meyrati]WCH96
| | |--E. curnieriP93
| | `--*Pseudoptychoceras’ gilberti Etayo Serna 1979WCH96
| `--Ptychoceras Orbigny 1842 (see below for synonymy)WCH96
| |--*P. emericianum Orbigny 1842WCH96
| |--P. adpressum (Sowerby 1814) (see below for synonymy)WCH96
| |--P. closteroides Etheridge 1904 [=Ptychoceras closteroides]WCH96
| `--P. gabbi Pervinquière 1907 [=*Diptychoceras laeve Gabb 1869 non Matheron 1842]WCH96
`--+--AncyloceratidaeEK02
`--DouvilleicerataceaeW81
|--DouvilleiceratidaeW69
`--TrochleiceratidaeWCH96
|--Pseudoleymeriella Casey 1957WCH96
| |--*P. haidaquensis (Whiteaves 1893) [=Hoplites haidaquensis]WCH96
| `--P. ibericaWCH96
`--Trochleiceras Fallot & Termier 1923 (see below for synonymy)WCH96
|--*T. balearense (Fallot 1920) [=Waagenia balearensis]WCH96
|--T. hoffstetteri Etayo Serna 1979 [=T. (*Juamportoceras) hoffstetteri]WCH96
|--T. mganeti (Collignon 1950) [=*Magneticeras magneti]WCH96
`--T. termieriWCH96

Ptychoceras Orbigny 1842 [incl. Diptychoceras Gabb 1869, Mastigoceras Böhm 1926 non Handschin 1924, Mastigohamites Breistroffer 1947, Tricoloceras Whitehouse 1928]WCH96

Ptychoceras adpressum (Sowerby 1814) [=Hamites adpressus, *Mastigoceras adpressum, *Mastigohamites adpressus]WCH96

Trochleiceras Fallot & Termier 1923 [incl. Juamportoceras Etayo Serna 1979, Magneticeras Collignon 1950]WCH96

*Type species of generic name indicated

References

[CDH04] Callomon, J. H., D. T. Donovan & M. K. Howarth. 2004. F. A. Quenstedt’s trinomial nomenclature of Jurassic ammonites. Palaeontology 47 (4): 1063–1073.

[DCH81] Donovan, D. T., J. H. Callomon & M. K. Howart. 1981. Classification of the Jurassic Ammonitina. 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. 101–155. Academic Press.

[EK02] Engeser, T., & H. Keupp. 2002. Phylogeny of the aptychi-possessing Neoammonoidea (Aptychophora nov., Cephalopoda). Lethaia 35: 79–96.

[H04] Haeckel, E. 1899–1904. Kunstformen der Natur. Bibliographisches Institut: Leipzig und Wien.

[H79] Hölder, H. 1979. Jurassic. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A390–A417. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[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.

[P87] Poulton, T. P. 1987. Zonation and correlation of Middle Boreal Bathonian to Lower Callovian (Jurassic) ammonites, Salmon Cache Canyon, Porcupine River, northern Yukon. Geological Survey of Canada—Bulletin 358: 1–155.

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

[W81] Wright, C. W. 1981. Cretaceous Ammonoidea. 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. 157–174. Academic Press.

[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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