Fig. 8
From: Functional morphology of immature mating in a widow spider
Serial cross sections of the genitalia of mated L. geometricus females in different developmental stages starting from the anterior. Dorsal is at the top, ventral is at the bottom. a-c: Spermathecae of a mated late subadult female are both filled with spermatozoa that are imbedded in a red-pink secretion. Additionally, some areas are stained in red-orange. d-f: Spermathecae of a mated adult female are both filled with spermatozoa that are imbedded in a red-pink secretion. Additionally, some areas are stained in red-orange. f: Posteriorly, the spermathecae are predominantly filled with a bright blue secretion. Scale bars = 100 μm. cd, copulatory duct; cf., common fertilization duct; s, spermatozoa; se, secretion; ue, uterus externus; sp., spermatheca