Glatziella helenae (Renz, 1914) probably from the late P. jugosus or early D. trigonica Zone at Dzikowiec in theSudetes and Karczówka in the Holy Cross Mountains.

Glatziella helenae - outline of the shell.

Diagnoza

Evolute conch with whorls height similar to width.

Porównanie

Each of the studied specimens is unique in the whorl cross section. No doubt that this is a highly variable species. Still, the extend of variability approaches, but does not reach the more Rhiphaeoclymenia-like morphology of the oldest species of the lineage, G. lethmathensis Becker, 1997 from the Rhenish Slate Mountains. There seems to be also a gap separating this species from the equally variable G. minervae (Renz, 1913). A possibility remains that these are actually members of a single continuous lineage. Unfortunately, all the specimens studied were collected from the scree in blocks too small to provide conodont samples of size enabling precise age determination.

Autekologia

Występowanie geograficzne

zikowiec and Karczówka. 

Zasięg czasowy

The early D. trigonica Zone. D

Materiały muzealne

ZPAL: 4 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.