Tornoceras
Encyclopedia
Tornoceras is a strongly involute, subdiscoidal Middle and Upper Devonian
Devonian
The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 416.0 ± 2.8 Mya , to the beginning of the Carboniferous Period, about 359.2 ± 2.5 Mya...
goniatite with a suture that forms six to ten lobes.
Aulatornoceras
Aulatornoceras
Aulatornoceras is a genus belonging to the Aulatornoceratinae subfamily, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.-References:* accessed on...
, Protornoceras, Epitornoceras, Lobotornoceras are among related genera included in the Tornoceratidae
Tornoceratidae
Tornoceratidae is a family of goniatitid ammonoinds from the middle and upper Devonian The family is included in the suborder Tornoceratinaand the superfamily Tornoceratoidea....
. Inclusion however varies from classification to classification.