Diagnoza

 P₁ elements with all three processes being of subequal length at mature stage and with well developed platform. S elements with sinuous orientation of denticles .

Porównanie

The apparatus shows much resemblance to that of later Lochriea, which is suggestive of having a common origin in an as yet unidentified Toumaisian lineage, possibly of prioniodinid affinities.

Its probable ancestor is S. praeanchoralis Lane et al.,1980 from the Deseret Limestone at Morgan, Utah. Together with typical morphotypes of the species (47 specimens) with a rudimentary anterior process, several specimens lacking such processes (20 in number, identified as S. dockali Chauff, 1981 by Lane & Ziegler 1983) and rare specimens with all three processes of almost equal length (2 in number, identified as S. anchoralis) occur there. The assemblage is thus completely distinct from the type population of S. anchorafts and little doubt remains that there is an ancestor-successor relationship between them. S. dockali Chauff, 1981, with its type population 32 m above the base of the Deseret Limestone at the Samak Section in the Uinta Mountains of Utab is a even more primitive member of the lineage having biramous P₁ elements.

Autekologia

Występowanie geograficzne

Zasięg czasowy

Materiały muzealne

Literatura

Dzik, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170.