Gogorev, R.M., Polyakova, S.L. & Nevrova, E.L. (2026) Thalassionema frauenfeldii f. pontica f. nov. (Bacillariophyta) from the Black Sea (Russia). Phytotaxa 778 (1): 39–51. https://doi.org/10.11646/phytotaxa.778.1.3