Pluckidina lipperti Bischoff, 1956 from the beginning of the K. triangularis Zone at Plucki, somewhat younger strata at the same locality and transition from the K. triangularis to K. crepida Zone at Jabłonna.

Apparatus composition of Pluckidina lipperti.

Diagnoza

Porównanie

The earliest Famennian Pluckidina is of a rather generalized morphology. It may be distinct taxonomically from the latest Frasnian type population of the species but with so few specimens available it is difficult to identify possible differences. The material seems to fit within the range of its variability. The population from the K. crepida Zone at Jabłonna  shows a somewhat more robust denticulation. Whether this reflects an evolutionary change or only ecophenotypic adaptation remains to be elucidated. Coeval, but usually allopatric, species of Ligonodina differ from those of Pluckidina mostly in the shape of the high arched S₁ elements (also M elements) and generally more delicate denticulation of S elements. The angular appearence of S₁ elements is an indication of the proximity to early gondolellids.

Autekologia

Występowanie geograficzne

Płucki
Jabłonna

Zasięg czasowy

From the beginning of Famennian to the early K. triangularis Zone.
Late K. triangularis to K. crepida Zones.  

Materiały muzealne

ZPAL: 183 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.