The recorded fusulinid assemblages in Moscovian/Kasimovian boundary beds in the Kolosseum section (Spitsbergen) correspond well to established fusulinid zones in the stratotype region of the Russian Platform.
Fusulinid assemblages in the Moscovian/Kasimovian boundary beds in Spitsbergen show a predominance of representatives of the Protriticites-Montiparus-Rauserites lineage. Representatives of the Praeobsoletes-Obsoletes-Triticites lineage in Spitsbergen occur later than in the stratotype region of the Russian Platform. The similarity of fusulinids from Moscovian/Kasimovian boundary beds in Spitsbergen, Cantabrian Mountains (Spain) and Carnic Alps (Austria) is compelling.
Moscovian/Kasimovian boundary beds in Spitsbergen and those in the adjacent areas (Northeast Greenland and Canadian Arctic) correlate well. The upper part of the Nansen Formation (units H-L) of the Sverdrup Basin, Canadian Arctic correlates with the Lower-Middle Kasimovian of the region of the Moscow Basin. The Moscovian/ Kasimovian boundary of Eurasia is approximately correlative with the basal DS-3 fusulinid zone of the Desmoinesian of North America.