OBSOLETES Kireeva, 1950

 

 

Type species: Fusulina obsoleta Schellwien, 1908 (*2753), p. 186; OD.

Obsoletes Kireeva, 1950 (*1693), p. 201.

Test elongate fusiform, whorls enlarging rapidly, septa numerous, plane in the central area, fluted at the poles; wall thin, perforate, of tectum, protheca, and thin discontinuous outer tectorium, chomata fairly wide, rang­ing from low to massive, asymmetrical, border­ing a rapidly widening tunnel. U. Carboniferous (Kasimovian); USSR: Russian Platform, Donbass; China.