Tornoceras is a strongly involute, subdiscoidal Middle and Upper Devonian goniatite with a suture that forms six to ten lobes.[1] Tornoceras is an extinct genus of cephalopods that shares similarities with the modern pearly nautilus. This genus first appeared during the Devonian Period, which spanned from 416 million to 359 million years ago. The shell is circular and relatively flat, with the final whorl enveloping the previous ones. The sutures between the successive chambers of the shell exhibit a gently rippled pattern.[2]
Aulatornoceras, Protornoceras, Epitornoceras, Lobotornoceras are among related genera included in the Tornoceratidae. Inclusion however varies from classification to classification.[1][3][4]
^ abArkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
Tornoceras is a strongly involute, subdiscoidal Middle and Upper Devonian goniatite with a suture that forms six to ten lobes. Tornoceras is an extinct...
Aulatornoceras, which has been considered a subgenus of Tornoceras has ventro-lateral grooves. As with Tornoceras, the suture forms six lobes. The shell itself...
molluscan paleontology that occurred in 2024. A study on the affinities of "Tornoceras" baldisi, based on data from new specimens from the Chigua Formation (Argentina)...
Treatise on Invertebrate Paleontology, 1957, Polonoceras is a subgenus of Tornoceras. Polonoceras, which lived during the Late Devonian, has an involute or...
also includes the Cheiloceratidae. Tornoceratinae is based on the genus Tornoceras described by Alpheus Hyatt in 1884. Aulatornoceratinae and Falcitornoceratinae...
†Tornoceratinae Genus: †Crassotornoceras House & Price 1985 Type species Tornoceras ausavense crassum Matern, 1931 Species C. annissi House & Price, 1985...
nomenclature Armatites started as Pseudoclymenia by Wedekind in 1918, became Tornoceras (Polonoceras) by Glenister in 1958, simply Polonoceras by Bogoslovskii...
House, M. R. (1965). "A Study in the Tornoceratidae: The Succession of Tornoceras and Related Genera in the North American Devonian". Philosophical Transactions...
"Goniatites" paucistriatus d`Archiac & de Verneuil (1842); genus also includes "Tornoceras" rhysum Clarke (1898). Ponticeras materni Sp. nov Valid Korn & Bockwinkel...
family. This genus was named by Becker in 1995. The type species is "Tornoceras" frechi. The shell of Phoenixites is discoidal, on which constrictions...
ammonoids had closed umbilicus. Suture was the same as in the gase of genus Tornoceras, while growth lines were similar to Cheiloceratidae, as they were strictly...
(Coniacian to Campanian) Japan A member of the family Tetragonitidae. Tornoceras incisum Sp. nov Valid Söte & Becker Devonian (Frasnian) Büdesheim Formation...
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