KOSKINOBIGENERINA Eickhoff, 1968

 

 

Type species: Koskinobigenerina breviseptata Eickhoff, 1968; OD.

Koskinobigenerina Eickhoff. 1968 (*1087), p. 168.

Test free, elongate, large, up to 1.7 mm in length, tapering at the base, chambers biserially arranged in the early stage, later becoming uniserial and rectilinear, with test enlarging less rapidly; wall single layered, calcareous, microgranular, and may have included angu­lar calcareous grains (of foreign particles?); aperture in the early stage single and at the base of the last chamber. in the later stage multiple, with a few rounded openings in the terminal face. L. Carboniferous (Visean) to U. Carboniferous; France, Germany: USSR: Moscow Basin.