Branmehla bohleana (Helms, 1959) from the C. quadrantinodosa Zone at Łagów, and K. crepida zones at Wietrznia, and the L. styriacus Zone at Miedzianka and Ostrówka in the Holy Cross Mountains.

Diagnoza

Elongated and rather robust P₁ element with relatively low cusp.

Porównanie

The geologically oldest populations of Branmehla from Łagów closely resemble the earliest Famennian Pluckidina lipperti  and that species is likely to be its ancestor. The main difference is in the morphology of the M element, which is higly arched in B. bohlenana. The transition from B. bohlenana to B. inornata is gradual and it is virtually impossible to delimit these species even if for most of their range they occur allopatrically.

The species is rather variable, especially in respect to the denticulation of P₁ elements. Denticles are wide and short, densely distributed in some specimens , or elongate and sparsely distributed in others.

Autekologia

Występowanie geograficzne

Wietrznia, Łagów, Miedzianka, Kowala, Ostrówka, and Dzikowiec.

Zasięg czasowy

Possibly ancestral population in the K. crepida Zone, the typical form from the C. quadrantinodosa Zone to the end of the Famennian 

Materiały muzealne

ZPAL: 1,664 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.