Cheiloceras discoidale (Sobolew, 1914) from Łagów-Dule in the Holy Cross Mountains.

Diagnoza

Suture with acutely pointed shallow flank lobe; minute conch with flat flanks and radially running sinuous internal thickenings.

Porównanie

There is a variation in development of the flank lobe, ranging from an angulation similar to that in Ch. angustivaricatum to a quite apparent, narrow, acutely pointed lobe. This may be an expression of the evolutionary change towards a more elaborate suture. Even more variable is the course of internal thickenings.

Autekologia

Występowanie geograficzne

Łagów-Dule., reworked at Sieklucki’s brickpit in Kielce.

Zasięg czasowy

C. quadrantinodosa and C. marginifera Zones.

Materiały muzealne

ZPAL: 220 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.