FIG. 14 in A study of the morphology and distribution of four Achnanthidium Kütz. species (Bacillariophyta), implications for ecological status assessment, and description of two new European species

FIG. 14. — Achnanthidium minutissimum (Kütz.) Czarn.: A-Q, S, T, W, Y, specimens from Burn of Savoch, Scotland; R, U, V, X, Z-AW, specimens from Belti Burn, Scotland; A, B, Z, LM views of frustules in girdle view; C-Y, AA-AW, LM views of valves. Scale bar: 10 µm.