Diagnoza

The elements sp-oz with a very deep basal cavity and rudimentarily denticulated processes; inner processes of the elements of the symmetry transition series denticulated with minute, sharp alternatin  denticles, remaining processes being more or less reduced.

Porównanie

The apparatus reconstrution proposed by DZIK (1976, 1978) has been proven by subsequent studies (ORCHARD 1980) and additional collecting in the Holy Cross Mountains, Baltic region, and Carnic Alps. The elements of the "platform" series are very variable and it is not quite certain whether differences in their shape and denticulation really represents a distinction between element types and not just population variability. There seems to be some ontogenetic change in the denticulation of the reduced processes in the symmetry transition series element s. Denticles disappear during element growth, and are being replaced with robust ridges .

There is now a good reason to believe that only a single lineage of the genus was represented in the Late Ordovician of Europe. It thus seems unavoidable to synonymize the names introduced by WALLISER (1964) for the topm ost Ordovician representatives of the species from the Cellon Section in the Austrian part of the Carnic Alps with those for specimens from almost coeval strata of the Monte Zermula on the Italian side of the boundary (SERPAGLI 1967). This involves a somewhat unfortunate change of widely used name of the species .

Autekologia

Występowanie geograficzne

Zasięg czasowy

This is a species characteristic of cold-water seas of the Late Ordovician, known from the whole Mediterra nean Realm as well as from the Baltic area and South China. In Mójcza it appears by migration 0.2 m below the top of the massive limestone (A . superbustordovicicus transition).

Materiały muzealne

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.