Planipolygnathus bilobatus (Ziegler, 1962) from the C. quadrantinodosa Zone at Łagów in the Holy Cross Mountains.

Diagnoza

Slight constriction in the middle of the heart-shaped outline of the flat, smooth platform.

Porównanie

This is clearly a successor of L. glaber and whether to distinguish them at the chronospecies or chronosubspecies rank is a matter of convenience. Differences are minor and ranges of population variability clearly overlap.

Autekologia

Występowanie geograficzne

Kadzielnia, Jabłonna, Kowala, Miedzianka, and Ostrówka.

Zasięg czasowy

Late K. crepida to L. styriacus Zones. 

Materiały muzealne

ZPAL: 3,891 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.