Ancyrodella nodosa Ulrich & Bassler, 1926 from the early Frasnian of Wietrznia I and mid Frasnian of Wietrznia II quarries.

Diagnoza

Although numerous robust ramiform elements are associated with P₁ (sp) elements of Ancyrodella in sample W³-R/A1, I failed to offer any convincing apparatus reconstruction. There seems to be a gradation towards associated robust polygnathids. Especially controversial is the morphology of S₂ (pl) and S₁ (lo) elements. Along with forms resembling those of Polygnathus, there are (at least in samples) specimens with very short processes. I am not able to decide which of those truly belong to Ancyrodella.

Porównanie

Autekologia

Występowanie geograficzne

Zasięg czasowy

Materiały muzealne

Literatura

Dzik, J. 2002. Emergence and collapse of the Frasnian conodont and ammonoid communities in the Holy Cross Mountains, Poland. Acta Palaeontologica Polonica 47 (4): 565-650