Diagnoza

Relatively involute conch, frequently developing numerous internal thickenings at the venter, parallel to the apertural sinus.

Porównanie

The holotype is an internal mould of a relatively evolute conch hardly distinguishable from the holotype of Praeflexiclymenia obliqua Czarnocki, 1989. Typical specimens from Łagów Dule are significantly more involute whereas another specimen included in P. obliqua Czarnocki,1989 is much more evolute. Generally, mature specimens are significantly more evolute than juveniles and some specimens show a change in conch geometry during the ontogeny. It seems thus that this is an extremely variable species both in respect to the conch evoluteness and the development of internal thickenings. The specimens from Jabłonna with extremely narrow venter are also included here.

Autekologia

Występowanie geograficzne

Łagów Dule and Jabłonna.

Zasięg czasowy

P. trachytera Zone. 

Materiały muzealne

ZPAL: 23 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.