FIGURE 2 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal

FIGURE 2. Measurements of acroloxid shells (after Kruglov & Starobogatov (1991b), modified). L, length of aperture; La, distance from apex to frontal apertural edge (projected on longitudinal axis of aperture); W, width of aperture; wL, distance from apex to left apertural edge; a, chord of anterior (maximal) slope; H, height of teleoconch; l, length of protoconch; w, width of protoconch; h, height of protoconch.