Spiders

Spiders

Any arachnid of the order Araneae, having a body divided into a cephalothorax with eight legs, two poison fangs, and two feelers as well as an unsegmented abdomen with several spinnerets that produce the silk used to make nests, cocoons, or webs for trapping insects.

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alice1

Beijing, China

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Spiders

Sigillum

Animals; Spiders

An impressed, sclerotized spot, often reddish-brown. Often present on the dorsal surface of the abdomen and marking points of internal muscle attachments.

Sperm induction

Animals; Spiders

The process of transferring the spermatozoa from the genital orifice beneath the base of the abdomen into the receptacle in the male palpus.

Sperm web

Animals; Spiders

A web of few or many threads on which male spiders deposit the semen preparatory to taking it into the palpus.

Metatarsus

Animals; Spiders

The sixth segment of the leg, counting from the body.

Orb web

Animals; Spiders

A two-dimensional web, roughly circular in design (and, strictly speaking, a misnomer). Silk threads radiate like spokes from a central hub. These are then overlaid with a spiral of silk, running ...

Palp

Animals; Spiders

Short for pedipalp. The appendage arising just in front of the legs, the coxa of which also forms the maxilla. It has no metatarsal segment and in adult males is greatly modified for the transfer of ...

Palpal organs

Animals; Spiders

The more or less complex structures fs)und in the terminal part of the adult male palp. They comprise groups of sclerites separated from each other and the cymbium by up to three haematodochac and ...