epigynum

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epigynum

[ə′pij·ə·nəm]
(invertebrate zoology)
The genital pore of female arachnids.
The plate covering this opening.
References in periodicals archive ?
The female has the epigyne with a deep oval central depression, similar to that of P.
The epigyne of the paratype female was dissected using entomological pins, cleared in a Labcon 5019U ultrasonic bath for 30 seconds, and drawn.
2009): Cetonana can be recognised by the following combination of characters: the presence of ventral leg cusps on metatarsi and tarsi I and II of both sexes (absent from tibiae of both sexes); scopulate metatarsi and tarsi I and II of females comprising erectile bristles; the absence of leg spines; flat carapace; AME that are clearly larger than the other eyes; PME that are smaller than the PLE; female epigyne with posterior copulatory openings; and male palp with strongly ventrally curved cymbium and a tegulum occupying only part of the ventral side of the cymbium.
Epigyne weakly sclerotised; copulatory openings broad and curved, in posterior half of epigyne, directed medially; ST II large, anteriorly situated, semi-circular; ST I triangular with whip-like duct (Fig.
Comments: The species has an easily recognizable epigyne, particularly the acute lobes of its rear edge and a pair of well-marked epigynal pockets (see Wanless 1984b, figs 13F, G).
Diagnosis: This genus can be recognised from other corinnids by the closely spaced posterior median eyes, densely setose and strongly spined anterior legs, and the uniquely shaped female epigyne and palpal morphology.
Epigyne were removed from the abdomen with entomological needle number 1.
In the cleared epigyne in ventral view, the fertilisation ducts appear as an asymmetrical, heart-shaped structure.
thoracicus Nicolet, 1849 by the shape of the female epigyne opening with usually straight rather than indented or irregular anterior border (Fig.
petraeum is that in the latter species the copulatory ducts open in the corners of the epigyne, not in its center.
Epigyne with flat or concave plate; spermathecae small, nearly rounded, well separated, close to epigastric furrow.