Pseudopolygnathus aculeatus (Branson & Mehl, 1934) from the P. jugosus and D. trigonica Zones at Kowala - P₁ elements.

Pseudopolygnathus aculeatus  - P₁ element.

Diagnoza

Denticles developed only on one side of the sharp ridge formed by the blade; left and right elements only slightly differ in their axial symmetry.

Porównanie

This is probably a successor of P. jugosus, but it apparently originated as a result of allopatric speciation and their ranges partially overlap in Polish sections. They probably were adapted to different environment, but the nature of these differences remain to be clarified.

Autekologia

Występowanie geograficzne

All studied localities.

Zasięg czasowy

Late P. jugosus to the end of the Famennian. 

Materiały muzealne

ZPAL: 1,014 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.