Diagnoza

A homoceratid with forwardly-projecting small plications at the umbilical edge, from which arise by both bi- or trifurcation and intercalation fine striae which cross the flanks and venter; 4 to 6 constrictions per whorl up to 25 mm. diameter. Suture with wide ventral lobe and low median saddle.

Porównanie

Differs from all the other species of Homoceras in that the small, forwardly-directed plications at the umbilical edge break up into three or four fine striae on the flanks and across the venter. Both intercalation and definite bifurcation takes place at the ventrad end of the plications and this structure is fundamentally different from H. eostriolatum and H. henkei in which there is no bifurcation and only very rare intercalation

Autekologia

Występowanie geograficzne

Ireland (Clare Co.), Great Britain (Devonshire, Lancashire. Wales), France (Nord-Pas-de-Calais), Germany (Rhenish Slate Mts.), Belgium (Liège) and Poland (Lublin Coal Basin).

Zasięg czasowy

Carboniferous, Chokierian and Alportian.

Materiały muzealne

Literatura

Hodson, F. 1957. Marker horizons in the Namurian of Britain, Ireland, Belgium and Western Germany. Association pour l'Etude de Paléontologie et de la Stratigraphie Houillères, Publication 24: 1-26.

Korejwo, K. 1986. Biostratigraphy of the Carboniferous deposits of the Swidnik blocks (Lublin Coal Basin). Acta Geologica Polonica 36 (4): 337-346.

Ramsbottom, W.H.C. 1977. Major cycles of transgression and regression (mesothems) in the Namurian. Proceedings of the Yorkshire Geological Society 41 (3 -24): 261-291.