P₁ elements of Protognathodus homopunctatus (Ziegler, 1962) from the late Visean of Todowa Grząba, Holy Cross Mts.

Diagnoza

Porównanie

The primitive morphology of the P₁ elements suggests that this species is a direct successor of the early Tournaisian Protognathodus rather than a relative of true idiognathodontids with their characteristically bent ventral processes of S_3-4 elements.

Autekologia

Występowanie geograficzne

Todowa Grząba in the Holy Cross Mountains, Poland.

Zasięg czasowy

Visean.

Materiały muzealne

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.