Semiacontiodus cornuformis (Sergeeva, 1963) from the Mójcza Limestone

Semiacontiodus cornuformis (Sergeeva, 1963) - microornamentation of element pl.

Apparatus of Semiacontiodus cornuformis (Sergeeva, 1963).

Diagnoza

The symmetrical element S₀ bears lateral furrows, which separate wide lateral ribs continuously connecting the base with the tip of the cusp. The medial inner rib with a deep medial furrow at its base.

Porównanie

The most characteristic feature of the species is the robustly alate appearance of the S₀ element, which has a regularly triangular contour in medial view. Identific ations of other element types are highly tentative because of their morphologic simplicity and the great population variability.

Autekologia

Występowanie geograficzne

Mójcza

Zasięg czasowy

Occurs only below the discontinuity surface (the oldest undoubted
specimens found 0.8 m below of it) while in the Baltic region it is a long ranging species . Its upper range is difficult to determine in the Baltic sections because it is very rare above the Llanvirn and the
diagnostic symmetrical elements are rarely reported .

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.