FIGURES 15–20. Fig. 15 in On the morphology and classification of larval water mites (Hydrachnidia, Acari) from springs in Luxembourg

FIGURES 15–20. Fig. 15: Sperchonopsis verrucosa, ventral idiosoma (from Martin 2000), Fig. 16: Sperchon clupeifer dorsal idiosoma (redrawn and modified after Ullrich 1976), Fig. 17: Sperchon setiger, dorsal idiosoma, Fig. 18: Sperchon setiger, ventral idiosoma and gnathosoma (from Renz et al. 2004), Fig. 19: Sperchon thienemanni, dorsal idiosoma, Fig. 20: Sperchon thienemanni, ventral idiosoma (Figs. 19–20 from Martin 2003).