During observations performed to describe the sexual behavior of the species, I had occasionally observed a male of the SU form with a lax, white membrane, the hematodocha, hanging from one of his pedipalpal bulbs (henceforth referred to as ''bulb'') after copulation.
In three of the seven males evaluated (43%), damage appeared in bulbs during successive sexual exposures (Table 1); irreversible expansions of the hematodocha were observed in two cases (males A and D) and an explosion of the hematodocha (male F) from the left bulb in another case (Fig.
A basal hematodocha connects the subtegulum with the petiolus and alveolus of the cymbium.
One side of the subtegulum is connected with the cymbium by the basal hematodocha. On the other side the subtegulum is attached to the sclerite of the middle part of the bulbus (tegulum) via the middle hematodocha.
Alternating insertions with only a single expansion of the hematodocha
also occurred in Rabidosa spp.
Petiole: In distant outgroups, the petiole is a large and prominent sclerite in the wall of the basal hematodocha
(e.g., lycosoids, Sierwald 1990).
A male that courts successfully mounts the female so they face in opposite directions, inserts a palp into one side of the female's epigynum, and expands the hematodocha once to force sperm into the female's copulatory tubes.
After insertion, the palpal hematodocha expanded a single time.
The genital bulb is an inter-connected assemblage of sclerites and distensible sacs (the hematodocha
For purposes of our study, palpal insertions were recorded as successful only if the extreme proximal end of the hematodocha
was observed to visibly expand and the female abdomen concomitantly inflated with this expansion.