Diagnoza

Acute venter of mature conch.

Porównanie

D. polonicum differs from other species of Dimeroceras in its acute venter. It is a matter of convenience whether an oxyconic conch form is anough to separate a species at generic level or not. Paratornoceras Hyatt, 1900 with Goniatites lentiformis Sandberger, 1857 from Enkeberg in the Rhenish Slate Mountains as its type species, is available for this purpose. The suture of the latter species is closely similar to that of the Łagów specimens.  Its conch, described  as Paratornoceras acutum (Münster, 1840) (considered nomen dubium ), is much more compressed and thus derived.

Gürich referred to this species as Brancoceras lentiforme. Tornoceras acutiforme Gürich, 1896 is probably based on a juvenile specimen of the same species from the same stratum.

Autekologia

Występowanie geograficzne

Łagów-Dule.

Zasięg czasowy

C. marginifera Zone. 

Materiały muzealne

ZPAL: 41 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.