GOGOREV, R.M., & G.V. KOVALEVA 2017 Thalassiosira azovica sp. nov. and some other Thalassiosira species (Bacillariophyta) from Holocene sediments of the Sea of Azov Novosti Sist. Nizsh. Rast. 51: 37-56, [1] text-fig., VIII pls., 2 tables R, E summary and description