Diagnoza

Porównanie

This incomplete specimen shows pointed lobes and saddles like Discoclymenia. However, the ventrolateral saddle, although incompletely preserved, seems to be subquadrate and undivided. This is a situation transitional between P. contiguum, and D. cucullata. There was proposed the neotype for Goniatites contiguus Münster, 1832, claiming that this is a species of Sporadoceras, not Posttornoceras. Although the neotype does not show generically diagnostic growth lines, he later changed his mind and transferred the species back to Posttornoceras  as was earlier done. For the sake of taxonomic stability it is probably reasonable to stop these shifts and assume that the second interpretation is correct.

Autekologia

Występowanie geograficzne

Kowala.

Zasięg czasowy

The P. jugosus (possibly the late L. styriacus) Zone.

Materiały muzealne

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.