Westergaardodina bicuspidata Muller, 1959 from the Mójcza Limestone.

Diagnoza

Completely reduced cusp, strongly thickened processes parallely arranged, leaving only a narrow fissure in between. Basal cavity restricted only to the distal margins of the processes.

Porównanie

This is a typically Late Cambrian species which has however been repeatedly reported also from the early and even middle Ordovician. It seems highly unlikely that the specimens from the Mójcza Limestone had been reworked from Cambrian strata because the Cambrian in the Kielce area is developed only in a coarse clastic facies. The species is more likely a survivor of its long ranging lineage.

Autekologia

Występowanie geograficzne

Zasięg czasowy

In the Mójcza Limestone found at the level 0.8 m and immediately below the discontinuity surface; Lenodus variabilis Zone, Kundan, Arenig/Llanvirn boundary (nera the base of Darriwillian).

Materiały muzealne

ZPAL

Literatura

Dzik, J. 1994a Conodonts of the Mójcza Limestone. In: J. Dzik, E. Olempska, & A. Pisera. Ordovician carbonate platform of the Holy Cross Mountains. Palaeontologia Polonica 53, 43-128.