Alternognathus regularis Ziegler & Sandberg, 1984 from the early P. trachytera Zone at Kowala and the L. styriacus Zone at Miedzianka in the Holy Cross Mountains.

Incomplete apparatus composition of Alternognathus regularis.

Diagnoza

Well developed but rather narrow platform of P₁ element with large nodes along the margin.

Porównanie

 The incipient axial symmetry of the elements refers only to the shape of the platform and is more clearly visible on juveniles than on large specimens with a wider platform. The blade remains curved in mirror-image pairs.

Autekologia

Występowanie geograficzne

Łagów, Kowala, Ostrówka, and Miedzianka.

Zasięg czasowy

C. quadrantinodosa to early P. jugosus Zones. 

Materiały muzealne

ZPAL: 1,390 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.