Fig. 7.

Semithin section series of the opisthosoma. a Opisthosomal septum consisting of an anterior circular and a posterior longitudinal myoepithelial layer. b Multicellular epidermal glands with prominent nuclei (arrowhead) filling the coelomic cavity of the opisthosoma. Median mesentery (arrow) provided with blood lacunae and suspending the ventral and dorsal blood vessel. Last one at a more median position. Double arrowhead = uncini. Abbreviations: bl = blood lacuna; cc = coelomic cavity; cm = circular muscle layer; dv = dorsal blood vessel; eg = epidermal gland; ep = epidermis; lm = longitudinal muscle layer; vv = ventral blood vessel