Apparatus composiion of Pseudopolygnathus primus.

Pseudopolygnothus primus (Branson & Mehl, 1934) from the Toumaisian Wapnica beds of Dzikowiec.

Diagnoza

Adult P₁ elements in early populations are narrow, with a long smooth furrow separating the posterior row of denticles (there is rather a platform than icrion at this side of the element).  In younger populations, the P₁ elements are more robust at comparable stages and more triangular in appearance.

Porównanie

P₁ elements are very variable but most of tchem closely resemble the Famennian Pseudopolygnathus ostrovkensis Dzik, 2006 that may be ancestral to this species.

Autekologia

Występowanie geograficzne

Zasięg czasowy

Tournaisian

Materiały muzealne

ZPAL

Literatura

Dzik, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170.