Palystes

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Palystes
Sparassidae Palystes castaneus mature female 9923s.jpg
Female Palystes castaneus near Somerset West, South Africa
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Sparassidae
Genus: Palystes
L. Koch, 1875
Type species
Palystes castaneus
Latreille, 1819
Species

See text

Diversity [1]
20 species

Palystes is a genus of huntsman spiders, commonly called rain spiders or lizard-eating spiders, [2] occurring in Africa, India, Australia, and the Pacific. [1] The most common and widespread species is P. superciliosus , found in South Africa, home to 12 species in the genus. [1] [2] The name Palystes is derived from either the Latin palaestes or the Greek palaistes, meaning "wrestler". [2] The genus was first described by Ludwig Carl Christian Koch in 1875. [1]

Contents

Build

Palystes species are large spiders, with a body length of 15–36 mm, and a leg span up to 110 mm. Their top side is covered in tan to dark tan velvety setae (hairs). The underside of their legs is banded in colour, and their legs and abdomens may be interspersed with slightly longer setae. They have a large moustachial stripe below their front eyes, and extending down their fangs. [2]

Habits

While Palystes species mostly hunt insects on plants, they commonly enter houses before rain, or during the summer, where they prey on geckos (usually Afrogecko porphyreus in the Western Cape, or Lygodactylus capensis in the eastern parts of southern Africa). Males are regularly seen from August to December, probably looking for females. [2]

Egg sac of P. castaneus Palystes castaneus (Sparassidae egg purse IMG 2662.jpg
Egg sac of P. castaneus

The large, round egg sacs of P. castaneus and P. superciliosus are commonly seen from about November to April. After mating in the early summer, the female makes a 60- to 100-mm sac out of silk, with twigs and leaves woven into it. She constructs the sac over 3–5 hours, then aggressively guards it until the spiderlings, which hatch inside the protective sac, chew their way out about three weeks later. Females construct about three of these egg sacs over their two-year lives. Many gardeners are bitten by protective Palystes mothers during this period. [2]

Venom

The size of Palystes spiders, combined with the banding on the underside of the legs exposed when the spider is in threat pose, give them a fearsome appearance. [2] [3] An experiment was done in 1959 where a P. superciliosus was allowed to bite an adult guinea pig on the nose. The guinea pig died within 7 minutes, leading to a belief that the spider's venom was dangerous. However, further research on anaesthetized guinea pigs showed that the original guinea pig had actually died of shock, rather than as a result of the spider's venom. [3] In humans a Palystes bite is no more dangerous than a bee sting. [2] It causes a burning sensation, and swelling which lasts for a few days. Recovery is spontaneous and complete. [3]

Tachypompilus ignitus dragging Palystes prey up a wall Tachypompilus ignitus PompilidaeIMG 3672a.jpg
Tachypompilus ignitus dragging Palystes prey up a wall

Wasps

Palystes spiders are also commonly seen paralysed, being dragged by a large wasp called a pompilid or spider wasp. Sometimes, the wasp is not present. Pompilid wasps only hunt spiders, which they paralyse by stinging them. They then drag the spider back to their nest where they lay an egg on the spider, then seal the spider and the egg in. When the egg hatches, the larva eats the paralysed spider, keeping the spider alive as long as possible by eating peripheral flesh first, and saving the vital organs till last. By doing this, the spider stays fresh long enough for the wasp larva to mature and pupate. [2] The pompilid wasp species Tachypompilus ignitus is at least largely a specialist hunter of mature Palystes females. [4]

Species

As of November 2022 according to The World Spider Catalog, Version 23.5: [1] it contains twenty species

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<span class="mw-page-title-main">Wolf spider</span> Family of spiders

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<span class="mw-page-title-main">Huntsman spider</span> Family of spiders (Sparassidae)

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<span class="mw-page-title-main">Nursery web spider</span> Family of spiders

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<span class="mw-page-title-main">Spider wasp</span> Family of wasps

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<i>Heteropoda venatoria</i> Species of spider

Heteropoda venatoria is a species of spider in the family Sparassidae, the huntsman spiders. It is native to the tropical regions of the world, and it is present in some subtropical areas as an introduced species. Its common names include giant crab spider, banana huntsman spider or cane spider.

<i>Dolomedes</i> Genus of spiders

Dolomedes is a genus of large spiders of the family Pisauridae. They are also known as fishing spiders, raft spiders, dock spiders or wharf spiders. Almost all Dolomedes species are semiaquatic, with the exception of the tree-dwelling D. albineus of the southeastern United States. Many species have a striking pale stripe down each side of the body.

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Episyron quinquenotatus, the white-trimmed black wasp, is a North American species of pompilid spider hunting wasp.

<i>Palystes castaneus</i> Species of spider

Palystes castaneus is a species of huntsman spider found in parts of South Africa. It is common from Cape Town to Heidelberg, Western Cape, especially in forested areas. In scrub outside forested areas, it is replaced by Palystes superciliosus. It occurs mainly on plants, where it hunts insects. It has a body length of 17–22 mm. P. castaneus is the type species for the genus Palystes, and was first described by Pierre André Latreille in 1819.

<i>Palystes superciliosus</i> Species of spider

The common rain spider, formerly P. natalius, is a species of huntsman spider native to Southern Africa. It is the most common and widespread species in the genus Palystes. In South Africa its distribution ranges from KwaZulu-Natal province in the east, then westwards to the provinces of Mpumalanga, Limpopo, Gauteng and North West in the north, and Eastern Cape and Western Cape in the south. It has a body length of 15–36 mm and a leg span of up to 110mm. The species was first described by Ludwig Carl Christian Koch in 1875.

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<i>Eusparassus</i> Genus of spiders

Eusparassus is a genus of huntsman spiders, known as the stone huntsman spiders, it was first described by Eugène Louis Simon in 1903.

<i>Cyphononyx optimus</i> Species of wasp

Cyphononyx optimus is a species of spider wasps in the family Pompilidae.

<i>Anoplius viaticus</i> Species of wasp

Anoplius viaticus, commonly known as the black-banded spider wasp, is a species of spider wasp. These wasps are known as spider wasps because the females capture spiders to provide their offspring with food. The paralysed spider is cached in a burrow, the wasp lays an egg on it, and when this hatches, the developing wasp larva consumes the spider. This species is found in sandy heathland across most of Europe.

<i>Tachypompilus ignitus</i> Species of wasp

The rain spider wasp or red-femora spider wasp is an Afrotropical species of spider wasp specialising in capturing spiders of the genus Palystes, the rain spiders.

<i>Hemipepsis tamisieri</i> Species of spider wasp

Hemipepsis tamisieri is a species of afrotropical pepsid spider wasp, one of the so-called tarantula hawks because its preferred prey are tarantulas of the family Theraphosidae.

<i>Cantuaria borealis</i> Species of spider

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References

  1. 1 2 3 4 5 Platnick, Norman I. (10 December 2011). "Fam. Sparassidae". The World Spider Catalog, Version 12.5. New York, NY, USA: American Museum of Natural History. doi:10.5531/db.iz.0001 . Retrieved 19 April 2012.
  2. 1 2 3 4 5 6 7 8 9 Larsen, Norman. "Palystes (rain spiders, lizard-eating spiders)". Biodiversity Explorer. Cape Town, South Africa: Iziko museums . Retrieved 19 April 2012.
  3. 1 2 3 Snyman, C.; Larsen, N. (March–April 2005). "Spider bite and its treatment in southern Africa" (PDF). Occupational Health Southern Africa. Kloof, South Africa: Technique Publishing. 11 (2): 22–26. ISSN   1024-6274. OCLC   80013902 . Retrieved 19 April 2012.[ permanent dead link ]
  4. Picker, Mike; Griffiths, Charles; Weaving, Alan (2004). Field Guide to Insects of South Africa (Updated ed.). Cape Town, South Africa: Struik. p. 402. ISBN   978-1-77007-061-5. OCLC   56338396.
  5. Jäger, P. and D. Kunz. (2010). Palystes kreutzmanni sp. n. – a new huntsman spider species from fynbos vegetation in Western Cape Province, South Africa (Araneae, Sparassidae, Palystinae). ZooKeys 67 1-9.