Diagnoza

Closed umbilicus with the flat adjoining wall of the conch giving it a conical appearance, rounded flank lobe of the suture of otherwise generalized tornoceratid type.

Porównanie

The suture, well visible in two juvenile specimens, fits well that of the type specimen. In the smallest one, indistinct ventrolateral furrows are represented. An adult incomplete specimen with body chamber, of estimated diameter about 55 mm, shows indistinct growth lines with typically tornoceratid rather rounded prominent auricles of the aperture. The conch geometry makes this species similar to Protornoceras simplicius, which has a rather simplified and variable suture. This was included  into Falcitornoceras although its juvenile conch ornamentation remains unknown. Because of the shape of umbilicus and a rather advanced tornoceratid suture I suggest that this is not Falcitornoceras, but is rather related to the Polonoceras branch at the stage preceding development of acute auricles.

Autekologia

Występowanie geograficzne

Jabłonna.

Zasięg czasowy

Probably the K. crepida Zone.  

Materiały muzealne

ZPAL: 5 specimens.

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.