Spitting spider

Family of spiders From Wikipedia, the free encyclopedia

Spitting spiders are a family of araneomorph spiders, the family Scytodidae, first described by John Blackwall in 1864.[2] It contains over 250 species in four genera,[1] of which Scytodes is the best-known.

Phylum:Arthropoda
Subphylum:Chelicerata
Class:Arachnida
Order:Araneae
Quick facts Scientific classification, Diversity ...
Spitting spiders
Temporal range: Cretaceous–present
Scytodes thoracica
Dictis striatipes spitting
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Scytodidae
Blackwall, 1864
Diversity[1]
4 genera, 253 species
blue: reported countries (WSC)
green: observation hotspots (iNaturalist)
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Description

Scytodidae spiders are haplogyne, meaning they lack hardened female genitalia. They have six eyes, like most spiders in this group, arranged in three pairs. They possess long legs and a dome-shaped cephalothorax, and are usually yellow or light brown with black spots or marks.[3][4]

Hunting technique

Scytodidae catch their prey by spitting a fluid that congeals on contact into a venomous and sticky mass. The fluid contains both venom and spider silk in liquid form, though it is produced in venom glands in the chelicerae. The venom-laced silk both immobilizes and envenoms prey such as silverfish. In high-speed footage the spiders can be observed swaying from side to side as they "spit", catching the prey in a criss-crossed "Z" pattern; it is criss-crossed because each of the chelicerae emits half of the pattern. The spider usually strikes from a distance of 10 to 20 millimetres (0.39 to 0.79 in) and the entire attack sequence only lasts 1/700th of a second.[5] After making the capture, the spider typically bites the prey with venomous effect, and wraps it in the normal spider fashion with silk from the spinnerets.[6]

Pre social behaviour

Some species exhibit presocial behaviour, in which mature spiders live together and assist the young with food.[7]

Habitat and lifestyle

They are ground and plant dwellers, free-running and nocturnal spiders. They are found throughout the region in all biomes, usually collected from vegetation and from under stones and dark places on the soil surface.[8]

Genera

As of January 2026, this family includes four genera and 253 species:[1]

References

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