Spiders (order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, [2] and spinnerets that extrude silk. [3] They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms.

Mar 22, 2025 · Spider, any of more than 46,700 species of arachnids that differ from insects in having eight legs rather than six and in having the body divided into two parts rather than three. All spiders are predators, feeding almost entirely on other arthropods, especially insects.

Oct 18, 2019 · A spider is not an insect; a spider is an arachnid. Arachnids are a separate group of animals to insects. Spiders are members of the class Arachnida; insects are members of the class Insecta. On the left is a spider – a black and yellow garden spider; on the right is an insect – a snowberry clearwing moth.

Spiders are arachnids, a class of arthropods that also includes scorpions, mites, and ticks. There are more than 45,000 known species of spiders, found in habitats all over the world.

Spiders are not insects (insects have three body parts and six legs). Spiders have two body parts, a hard front part, the head and thorax, called the cephalothorax or prosoma and a soft hind part, the abdomen, called the opisthosoma.

Feb 5, 2025 · Spiders are eight-legged arachnids that live across almost all of Earth aside from Antarctica. As of 2022, there are nearly 50,000 species of spiders living across nearly every major biome. Spiders range from incredibly tiny – the smallest spider is a fraction of the size of a pinhead – to giant spiders that can measure a foot across.

Apr 26, 2023 · House spider is a term for several Arachnida species typically found in homes. Identifying features of common house spiders are their eight legs, body shape, distinctive markings, color, and presence of hairs. Most house spiders are brown and hairless. However, the black widow with its distinctive red hourglass marking is an exception.

Jan 20, 2025 · Spiders, classified under Araneae (the largest order of Arachnids), represent a diverse group of air-breathing arthropods known for their distinctive anatomical features.

A Spider is any creature in the taxonomic order Araneae. Researchers place all Spiders in the taxonomic class Arachnida, which makes them “arachnids.” However, while all Spiders are arachnids, not all arachnids are Spiders.

Spiders (class Arachnida, order Araneae) are air-breathing arthropods. They have eight legs, and mouthparts (chelicerae) with fangs that inject venom. Most make silk. The spiders are seventh in number of species of all animal orders. [2] About 48,000 spider species, and 120 families have been recorded by taxonomists. [3]