Cheiracanthium mildei
Male
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Cheiracanthiidae
Genus: Cheiracanthium
Species:
C. mildei
Binomial name
Cheiracanthium mildei
L. Koch, 1864[1]
Synonyms[1]
  • Cheiracanthium anceps O. Pickard-Cambridge, 1872
  • Cheiracanthium strasseni Strand, 1915
  • Cheiracanthium cretense Roewer, 1928

Cheiracanthium mildei is a species of spider from the family Cheiracanthiidae. C. mildei is commonly known as the northern yellow sac spider, a name it partially shares with many other spiders of its genus.[2] Alternatively, it is also called the long-legged sac spider.

Description

Long Legged - Yellow - Sac Spider (Cheiracanthium mildei)
Male

C. mildei usually has a pale green or tan body, with darker brown palpi and chelicerae. An adult C. mildei is usually 7–10 millimetres (0.3–0.4 in) in body size. Each leg ends in double claws, and the front pair is significantly longer (up to two times the size).[2] The eyes have a tapetum lucidum that reflects back to the light source once lit, however the "canoe-shaped" tapetum they possess is incapable of forming sharp images, so the benefit of these tapetum is uncertain, although they may assist in navigation through the detection of the polarization of light from the sky.[3] Although this spider can bite humans, the effects appear to be mild.[4]

Habitat and distribution

C. mildei is native to Europe and North Africa through the Caucasus to Central Asia. It is introduced to the United States and parts of South America.[1] It widespread across the northeastern United States and eastern Canada, and can be found outside, or more commonly inside houses. It is thought to have been introduced into America from Europe by English colonists.

Prey and predators

C. mildei is a dominant predator of S. littoralis (a moth species) in Africa and Mid Eastern regions. The mechanism of predation include causing direct death by consuming the larvae and causing indirect death by dispersing larvae from its host plants.[5]

References

  1. 1 2 3 "Taxon details Cheiracanthium mildei L. Koch, 1864". World Spider Catalog. Natural History Museum Bern. Retrieved 2020-10-19.
  2. 1 2 "Spiders of the NW". Woodland Park Zoo. Archived from the original on 2013-09-18. Retrieved 2012-11-20.
  3. ↑ Barth, Frederich (1985). "The Morphology and Optics of Spider Eyes". Neurobiology of Arachnids. pp. 53–78. ISBN 978-3-642-70348-5.
  4. ↑ "Verified bites by Yellow Sac spiders (genus Cheiracanthium) in the United States and Australia: Where is the necrosis?". The American Journal of Tropical Medicine and Hygiene. Archived from the original on 2015-09-08. Retrieved 2015-05-10.
  5. ↑ Mansour, Fadel; Rosen, David; Shulov, A (1981). "Disturbing effect of a spider on larval aggregations of Spodoptera littoralis". Entomologia Experimentalis et Applicata. 29 (2): 234–237. doi:10.1111/j.1570-7458.1981.tb03063.x. S2CID 84583609.
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