Panderodus sulcatus (Fåhræus, 1966) from the Mójcza Limestone, Holy Cross Mts.

Apparatus of Panderodus sulcatus (Fåhræus, 1966) (Dzik 1994).

Diagnoza

Relatively robust elements, generalized in shape, the M elements gently curved, wide; a symmetrical element present.

Porównanie

The general apparatus composition has been known since Löfgren's (1978) description. The anterior, M element departs morphologically from the remaining three types that can be easily distinguished from one another owing to the presence or absence of one or two ribs bordering their external sides. The surface of the elements is almost smooth. The symmetrical S₀ element has two furrows but sometimes one of them is less complete, which makes the element not quite symmetrical.
Undoubted symmetrical elements have been found only in older populations of the species, higher up they seem to be missing.

Autekologia

Występowanie geograficzne

Mójcza and Międzygorz. The species is known also from the Llanvirn of the Baltic region.

Zasięg czasowy

Occurs in Mójcza from 0.4 m above the discontinuity (E. robustus Subzone,
Llanvirn) at least up to 0.5 m above the bentonite (A. tvaerensis Zone, Early Caradoc) and there seems to be an evolutionary continuity to Panderodus sp. A.

Materiały muzealne

ZPAL

Literatura

Dzik, J. 1994. 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.