Diagnoza

Suture with shallow additional ventral lobe asymmetrically subdividing the ventral saddle and located closer to ventral than to flank lobe.

Porównanie

The suture of a specimen from the Sacculus Bank at Łagów-Dule, that is from the Upper Łagów Beds, which fits that of the Kowala specimens. Goniatites subbilobatus Münster, 1839 is now interpreted as a species of Acutimitoceras so this name cannot be used in the meaning given to it by Gürich (1901). From some reason Sobolew (1914), while referring to the same specimen, suggested that it may come from the clymeniid limestone. This seems to be contradicted by the new Kowala findings. Specimen ZPAL AmVII/562 from Łagów shows growth lines of Sporadoceras and suture closely similar to that of the holotype. Judging from its rock matrix it is from the latest C. marginifera Zone.

Autekologia

Występowanie geograficzne

 Kowala and Łagów-Dule

Zasięg czasowy

Mid C. marginifera Zone.

Materiały muzealne

ZPAL: 5 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.