Planipolygnathus styriacus (Ziegler, 1957) from its nominal Zone at Miedzianka  and Ostrówka in the Holy Cross Mountains - P₁ elements.

Diagnoza

Wide and asymmetric platform of P₁ element with densely tuberculated dorsal part separated from smooth ventral areas by a transverse row of larger tubercles.

Porównanie

Early populations of L. styriacus show great variability in their platform outline, some specimens being narrower even than in the ancestral L. granulosus. The transition apparently took a significant time span, the zonal boundary is thus hardly clear-cut. It is possible that some populations from Ostrówka co-occurring with P. trachytera actually represent L. granulosus, not L. styriacus as suggested by their variable morphology

Autekologia

Występowanie geograficzne

Jabłonna, Ostrówka, Kowala, and Miedzianka.

Zasięg czasowy

Nominal zone.

Materiały muzealne

ZPAL: 

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.