Fig. 1From: Functional morphology of immature mating in a widow spiderExternal genital region of virgin L. geometricus females in different developmental stages. Ventral view. Anterior is at the top, posterior is at the bottom. a: Early subadult female. b: Late subadult female. c: Adult female. Arrow indicates slit-like access to the atrium. Scale bars = 0.1 mmBack to article page