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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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Spiders

spiracle

Animals; Spiders

The opening of the tracheae on the underside of the abdomen.

stadium

Animals; Spiders

The interval between the molts of arthropods; instar; a period in the development of an arthropod.

sternum

Animals; Spiders

The heart-shaped or oval exoskeletal shield covering the under surface of the cephalothorax.

stridulating organ

Animals; Spiders

A file-and-scraper for sound production; may be variously located on chelicerae, palps, legs, abdomen and carapace.

subadult

Animals; Spiders

Almost adult; the last instar before maturity.

synonym

Animals; Spiders

Each of two or more scientific names of the same rank used to denote the same taxon. The senior synonym is the name first established.

tarsus

Animals; Spiders

The most distal (or end) segment of a leg or palp.

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