Diagnoza

Internal thickenings usually well developed on conch flanks, about six per whorl; conch discoidal in shape; suture with additional ventral lobe deeper than flank lobe and with wide ventral saddles.

Porównanie

From the type species of the genus this one differs in regularly distributed internal constrictions of the shell. In the Ostrówka sample, large specimens show ventral sinus of the internal conch thickening deeper than it is in juveniles. This suggests that small specimens from other localities represent the same species. The difference between S. varicatum and S. lagoviense is thus mostly in the morphology of suture. Growth lines are visible only in juvenile specimen ZPAL AmVII/672 from Łagów, of questionable affiliation.

Autekologia

Występowanie geograficzne

Łagów-Dule, Jabłonna, and Ostrówka; Kowala.

Zasięg czasowy

P. trachytera Zone; the L. styriacus zone

Materiały muzealne

ZPAL: 49 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.