New data on the family Caucasinidae N. Bykova (late Cretaceous-Miocene Foraminifers)

Caucasina oligocenica Chalilov (type species) and C. schischkinskayae (Samoilova) are shown to be separate species. The diagnoses of the genera Caucasina, Caucasinella, and Tergrigorjanzaella of the family Caucasinidae are revised and emended. Based on the structure of the test, aperture with the toothplate, and the radially crystalline wall, this family is assigned to the order Buliminida. The data on the species composition, geographical and stratigraphic distribution of the family Caucasinidae are expanded; the paleoecology of this group is revised. The diagnoses of the listed genera are emended and new species, Caucasina robusta, C. bogdanoviczi, C. maryensis, and Caucasinella bykovae are established.