Diagnoza

Flanks and venter are broadly rounded with a slight flattening at the centre of the venter; umbilical edge is rounded and the umbilical walls vertical; the test is ornamented with crenulate transverse striae which bifurcate near the umbilical edge with extra striae irregularly interpolated; in direction the striae are at first radial, or slightly bent backwards, and arch slowly and evenly forward to a broad shallow lingua and a shallow hyponomic sinus; weak secondary spiral striae are diffused over the periphery and these are slightly accentuated on the lingua and weaker on the venter where the transverse striae also are weaker and barely crenulate; constrictions are four per whorl.

Porównanie

Autekologia

Występowanie geograficzne

Ireland (Clare County), Great Britain (Derbyshire, Yorkshire), France (Nord-Pas-de-Calais), Belgium (Hainaut, Liège) and Poland (Lublin Coal Basin).

Zasięg czasowy

Carboniferous; Namurian (R.dubium - R.reticulatus zone)

Materiały muzealne

One specimen figured in Korejwo, 1986

Literatura

Bisat, W.S. & Hudson, R.G.S. 1943. The lower Reticuloceras (R1) goniatite succession in the Namurian of the North of England. Proceedings of the Yorkshire Geological Society 24 (6): 383-440.

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