Epigyne

[1] The primary function of the epigyne is to receive and direct the palpal organ of the male during copulation.

The epigyne covers or accompanies the openings of the spermathecae, which are pouches for receiving and retaining sperm.

[1] A more complicated form of epigyne is found in spiders of the genus Araneus, where there is developed an appendage which is usually soft and flexible, and which is termed the scape or ovipositor.

The basal plate of the epigyne which bears the scape, and which forms a porch or hood that covers the opening of the oviduct is called the atriolum.

[1] A still more complicated form of epigyne is found in some of the sheet weavers (Linyphiidae) and orb weavers (Araneidae), where the ovipositor consists of two finger-like projections: first, the more common one, the scape, which arises from the atriolum, and consequently in front of the opening of the oviduct; and second, one which arises behind the opening of the oviduct; this is termed the parmula.