Ostrovkites numismalis Dzik, 2006 from the P. trachytera Zone at Ostrówka in the Holy Cross Mountains.

Diagnoza

Minute conch with serial internal thickenings following the aperture on its whole extend, suture with an additional narrow ventral lobe developed on the slope of ventrolateral saddle.

Porównanie

There is a possibility that Sobolew’s (1914) Oma-monomeroceras (Cheiloceras) sinuvaricatum from the Lower Łagów Beds represents the same lineage. The course of internal thickenings in the single known specimen (Sobolew 1914: pl. 7: 10) is similar to that in specimens from Ostrówka, although they are less sinuous. Unfortunately, the suture was poorly preserved in the Sobolew’s specimen, which is probably lost.

Autekologia

Występowanie geograficzne

Ostrówka

Zasięg czasowy

P. trachytera Zone.

Materiały muzealne

ZPAL: 8 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.