Apparatus of Dapsilodus mutatus (Branson & Mehl, 1933).

Dapsilodus mutatus (Branson & Mehl, 1933) from the Mójcza Limestone.

Diagnoza

Mature elements with sharp smooth lateral ridges and external margins ornamented with oblique striae .

Porównanie

It is not quite certain whether the type population of Belodus mutatus is conspecific with the European populations traditionally attributed to the same species. The holotype is an M element, which is diagnostic for the genus. The Mójcza sample MA-93 departs from the others containing elements of Dapsilodus in that its elements are much larger and more prominently ornamented there than in samples below and above. Whether this population represents another species (perhaps D. obliquicostatus) or just a fluctuation in the population dynamics is hard to decide with so limited data available .

Autekologia

Występowanie geograficzne

Mójcza, Międzygórz and Zalesie.

Zasięg czasowy

The range of occurrence of D. mutatus in the Mójcza section is separated from
its possible ancestor, D. viruensis, by a brief gap. The nature of the relationship between them has thus to be recognized in other sections. The species occurs from 1.9 m above the bentonite A.tvaerensis/superbus transition zone) up to the top of the section.

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.