Tornoceras pseudobilobatum Dybczyński, 1913 from the mid C. marginifera Zone at Kowala in the Holy Cross Mountains.

Tornoceras pseudobilobatum; growth lines traced from imprints on the conch pyritic internal mould, suture, and outline of the shell.

 

Diagnoza

Suture with incipient dorsolateral lobe and relatively straight course of the ventrolateral saddle, otherwise generalized tornoceratid conch.

Porównanie

In the two best preserved relatively large specimens, the siphuncle position is somewhat asymmetric. Juvenile whorls are gently rounded, any relationship to Falcitornoceras bilobatum is thus unlikely, contrary to attribution of this species to F. falcatum. This is probably rather an advanced member of the Tornoceras branch.

Autekologia

Występowanie geograficzne

Kowala; reworked at Sieklucki’s brickpit in Kielce.

Zasięg czasowy

The mid C. marginifera Zone. 

Materiały muzealne

ZPAL: 6 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.