Tornoceratinae [SEP] parent taxon
Tornoceratinae
Tornoceratinae is one of three subfamilies of the Tornoceratidae family, 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.
- The Paleobiology Database accessed on 10/01/07
The Tornoceratinae form the root stock of the tornoceratids and are derived from Anarcestida. Tornoceratinae in turn gave rise to Aulatornoceratinae and Falcitornoceratinae.
The Tornoceratinae includes "Tornoceras", "Epitornoceras", "Lobotornoceras","Protornoceras", and "Tornia", described in the Treatise (L 1957), along with "Crassotornoceras", "Linguatornoceras", "Domanikoceras", "Simcheiloceras", and "Oxytornoceras" which were added later.
"Aulatornoceras", type for the Aulatornoceratinae was previously considered a subgenus of "Tornoceras"