Opis

Triramous S0 elements and narrow basal cavity of P1 elements with a tendency to inversion, frequently connected with development of a platform; apparatus generalized.
The Polygnathidae originated at the beginning of the Devonian from Ozarkodina, a member of the Spathognathodontidae, by developing a medial process in S0 elements and elongation of processes in other S elements. Pandorinellina probably represents this first lineage continued without significant changes to the Famennian.

Synonimy

Zasięg czasowy

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.