The functional morphology of the genitalia of the pholcid spider Psilochorus simoni (BERLAND, 1911) is analyzed using the method of freeze-fixation of copulating pairs and the preparation of histological serial sections of the copulatory organs in functional contact. Courtship and copulation behaviour are described and preliminary notes on egg-sac production and life history are given. A median pouch in the vulva of P. simoni is interpreted as seminal receptacle and a convergent origin of receptacles in Pholcidae is discussed. The male cheliceral apophyses, found in most pholcids, are considered to have evolved in the context of copulation and mate choice, rather than male-male combat.
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Bernhard A. Huber (1993) studied this question.