Gatunek typowy
Lobotornoceras bicaniculatum Petter, 1959 from the Famennian of Algeria.

Opis

Diagnosis. — Generalized tornoceratid conch with ventrolateral furrows at early developmental stages; suture with a deep, symmetrical flank lobe and a tendency to developed dorsolateral lobe. 

Remarks. — House and Price (1985) questioned relationships between the Famennian tornoceratids with complex suture traditionally classified in Lobotornoceras Schindewolf, 1936 and the type species of the genus, Goniatites ausavensis Steininger, 1856 from the mid Frasnian Büdesheim Shale of the Eifel Mountains (House 1978). Following this suggestion, Becker (1993b) transferred the Famennian species with ventrolateral furrows at early ontogenetic stages to Falcitornoceras. They differ rather substantially from the type species of that genus in having rounded auricles and lacking the characteristic juvenile ornamentation. Later (Becker 1995) introduced the genus Gundolficeras for some members of this branch. It seems to be the first link in the tornoceratid lineage leading to more and more complex suture, terminating in the acutely discoidal Discoclymenia.

Synonimy

Zasięg czasowy

Literatura

Dzik, J. 2006. The Famennian "Golden Age" of conodonts and ammonoids in the Polish part of the Variscan sea. Palaeontologia Polonica 63, 1-359.