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A fold, known as the epigastric furrow, separates the region of the book lungs and epigyne from the more posterior part of the abdomen. In the middle of this furrow is the opening of the oviduct (in females) and at either end are the lung slits. [11] In most spiders the external segmentation is no longer visible, but is still noticeable internally.
Basic arrangement of spider eyes, viewed from above Arrangement of eyes in most Salticidae, viewed from above. Epigastric furrow or epigastric fold: A transverse slit towards the front (anterior) of underside of the abdomen; the front pair of book lungs open at the edge of this furrow as do the genital openings (gonopores) [10]
As the epigyne varies greatly in form in different species, even in closely related ones, it often provides the most distinctive characteristic for recognizing species. It consists of a small, hardened portion of the exoskeleton located on the underside of the abdomen, in front of the epigastric furrow and between the epigastric plates. [1]
The spider has an elongated epigyne with a large deep central depression and two pockets lining the sides of the epigastric furrow. The copulatory openings, placed at the back of the epigyne, lead to wide insemination ducts to u-shaped receptacles, or spermathecae .
The spider's spinnerets are light and its legs are light brown, with spines being present on the front pair. The pedipalps, sensory organs near the mouth, have a pronounced spine. It has distinctive copulatory organs, with an epigyne that has v-shaped edge to the very back and a large double pocket in the epigastric furrow.
The spider has an oval epigyne with two depressions towards the back and a pocket near the epigastric furrow. [4] The seminal ducts are very long and coiled. [12] The internal morphology is more complex than other members of the genus. [13]
Otherwise, it is similar. The epigyne is large with copulatory openings on its sides and a large pocket in the epigastric furrow. [13] The insemination ducts complex in shape, wide with characteristic curves and parallel crescent-shaped chambers. They lead to circular spermathecae. [12] Spiders of the Menemerus genus are difficult to ...
There long white bristles at the very front of the abdomen and dark spinnerets. The legs are mainly light brown, with some darker segments, many spines and brown leg hairs. The female copulatory organs are distinctive. There is a very wide pocket in the epigastric furrow at the very rear of the small epigyne.