Pyrgulinae (Hydrobiidae) of the Kolankaya I fauna. A–E. Prososthenia cf. sturanyi communis Willmann, 1981, RGM 962615, sample 2. F–J. P. cf. sturanyi communis, SNSB-BSPG 2023 XII 11, sample 2. K–Q. Xestopyrguloides ? sagitta sp. nov., holotype, RGM 962616, sample 2. R. Xestopyrguloides ? heldreichii (Fuchs, 1870), lectotype (designated by Willmann 1981), NHMW 1878 XX 28, Megara, Pliocene. S–U. Xestopyrguloides? sp., RGM 1365347, sample 2. Scale bars: 1 mm (A–D, F–I, K–N, R–T); 100 μm (E, J, O–Q).