Tripodellus subtilis (Khalymbadzha et Chernysheva, 1978) with biramous P₂ elements from the late K. triangularis Zone at Wietrznia and the K. crepida Zone at Jabłonna in the Holy Cross Mountains.

Apparatus composition of Tripodellus subtilis.

Diagnoza

P₁ element with narrow, convex platform of asymmetric lanceolate outline, extending ventrally to half length of the blade.

Porównanie

Taxonomic identification of the species is based on Metzger (1994). Rare elements associated with P₁ elements of the species include biramous P₂ elements, which suggests its origin from T. variabilis. If true, this would then be a relict lineage evolving towards reduction of the platform in P₁ elements.

Autekologia

Występowanie geograficzne

Zasięg czasowy

Materiały muzealne

24 specimens

Literatura