Baltoniodus prevariabilis (Fahraeus, 1966) from the Mójcza Limestone.

Diagnoza

The ke and hi elements almost indistinguishable from each other, both having rudimentary anterior process, sp elements with a thin -walled triangular expansion at the base of the inner process.

Synonims:

 Prioniodus prevariabilis n. sp.; FAHRAEUS,1966; Prioniodus prevariabilis FAHRAEUS; BERGSTROM, 1971; Prioniodus alatus HADDING; BEDNARCZYK, 1971; Prioniodus prevariabilis FAHRJEUS; BEDNARCZYK, 1971; Paracordylodus lindstroemi BERGSTROM; BEDNARCZYK, 1971; Prioniodus navis LINDSTROM, 1971; Prioniodus alatus alatus HADDlNG; DZIK, 1976; Prioniodus (Baltoniodus ) prevariabilis prevariabilis FAHRAEUS; LOFGREN, 1978.

Porównanie

The species was reinterpreted as multielement by BERGSTROM (1971) and illustrations of all elements were given by DZIK ( 1976) and LOFGREN (1978). Juvenile sp elements of this species have considerably longer processes than those of B. parvidentatus. The shape of the expansion of the base is highly variable within populations. The ke and hi elements, although closely similar in outline, can be distinguished owing to a different profile of the rudiment of the anterior process. In the ke elements the rudiment of the anterior process is unified with the inner margin of the external process and its surface is somewhat angular. In the hi elements the process is more or less parabolic in outline and located in between the remaining processes.

Autekologia

Występowanie geograficzne

Zasięg czasowy

In Mójcza the species occurs from the discontinuity surface up to 0.2 m above
the bentonite; elsewhere in the Late Llanvirn and Llandeilo .

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.