FIGURES 21–26 in Phylogenetic relationships of the subfamily Pyrgulinae (Gastropoda: Caenogastropoda: Hydrobiidae) with emphasis on the genus Dianella Gude, 1913

FIGURES 21–26. pyrgulid radulae: 21–22. Pyrgula annulata, Lake Garda: 21. central tooth (bar equals 5 µm), 22. half a transverse row (bar equals 10 µm); 23–26. Dianella thiesseana, Lake Trichonida: 23. lateral and marginal teeth (bar equals 10 µm), 24. central tooth (bar equals 5 µm), 25. radula with teeth in natural position (bar equals 10 µm), 26. central and marginal teeth (bar equals 10 µm)