Diagnoza

compressed shell and has a small umbilicus, about 17 percent, of a diameter of 12 mm and 8 percent, of a diameter of 25 mm (known only from shale impressions the proportions of thickness to diameter are unknown); transverse striae are slightly roughened and average 5 to the mm, on the lingua in adolescence; lingua is small in projection and the hyponomic sinus is relatively shallow; umbilical plications, from which the transverse striae bifurcate, are thin and the branching is irregular; in adolescence they form a zone with wider areas of smooth test between them than between the striae and this persists up to about 12 mm. diameter; on some specimens weak spirals occur, especially on the lingua

Porównanie

very close to R. eoreticulatum which has a similar umbilicus and agrees in the general character of the ornament, but which has the transverse striae rather more clearly cut, has a better developed lingua, and possesses a greater tendency to subordinate spirals in early adolescence.

Autekologia

Występowanie geograficzne

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

Zasięg czasowy

Carboniferous; Bashkirian

Materiały muzealne

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. 1969. Stratigraphy and palaeogeography of the Namurian in the Polish Lowland. Acta Geologica Polonica 19 (4): 609-70.

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