Figure 3 in The Simulium vernum group (Diptera: Simuliidae) in Europe: multiple character sets for assessing species status

Figure 3. Cephalic cuticle of pupae, showing the location of the cross-sections for counting microtubercles (100¥), and sections of the surface sculpture (200¥) of (A) S. juxtacrenobium Bass & Brock., (B) Simulium crenobium (Knoz, 1961), and variations (C, D) of Simulium vernum s.s. Macquart, 1826 across the right-hand side of the middle transect. Scale bars: 0.1 mm.