Pseudopolygnathus ultimus (Bischoff, 1957) from the P. jugosus Zone at Dzikowiec in the Sudetes and the D. trigonica Zone at Kowala in the Holy Cross Mountains.

Diagnoza

The lateral rows of denticles in the dorsal part of the icrion of P₁ elements transformed into wide transverse ridges separated in the middle by a longitudinal escarpment, sometimes forming also a low crest.

Porównanie

Left and right elements differ in width of icrion and prominence of its ribbing. The species seems to be a direct successor of P. ziegleri but the transition was probably long-lasting and population variability wide. It is thus hardly of much correlative value in stratigraphy.

Autekologia

Występowanie geograficzne

Kowala and Dzikowiec.

Zasięg czasowy

Latest P. jugosus and D. trigonica Zones. 

Materiały muzealne

ZPAL: 1,333 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.