Tornoceras is a strongly involute, subdiscoidal Middle and Upper Devonian goniatite with a suture that forms six to ten lobes. Aulatornoceras, Protornoceras, Epitornoceras, Lobotornoceras are among related genera included in the Tornoceratidae. Inclusion however varies from classification to classification. References Tornoceratidae Goniatitida genera Devonian animals of Europe Devonian animals Late Devonian animals Devonian animals of Africa Middle Devonian first appearances Late Devonian genus extinctions