Giant house spider

Taxobox
name = Giant house spider

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image_width = 250px
regnum = Animalia
phylum = Arthropoda
classis = Arachnida
ordo = Araneae
familia = Agelenidae
genus = "Tegenaria"
species = "T. duellica"
binomial = "Tegenaria duellica"
binomial_authority = Simon, 1875
range_

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range_map_width = 250px

The Giant house spider ("Tegenaria duellica"; formerly known as "T. gigantea") is a member of the genus Tegenaria and is a close relative of both the Domestic house spider and the infamous Hobo spider. The bite of this species does not pose a threat to humans or pets.

Appearance

Females can reach 18 mm in length, with males having a slightly smaller body at around 12 mm to 15 mm in length. The female leg span is typically around 45 mm. The leg span of the male is highly variable, with spans between 25 mm to 75 mm being common.

The Giant house spider has the same coloration as the Domestic house spider; it has earthy tones of brown and muddy red or yellow. They also have conspicuously hairy legs and abdomen.

Habitat

The Giant house spider is indigenous to north western Europe and the pacific northwest of North America.

The webs built by the Giant house spider are flat and messy with a funnel at one end. The spider lurks in the funnel until a small invertebrate happens to get trapped in the web, at which point the spider runs out and attacks it.

They usually build their webs in corners (on both the floor and ceiling), between boxes in basements, attics, or any other area that is rarely disturbed by large animals, or humans.

Males can often be seen wandering around during the late summer and early autumn looking for a mate.

peed

With speeds clocked at convert|1.73|ft/s|m/s|abbr=on, the giant house spider held the Guinness Book of World Records for top spider speed until 1987 when it was displaced by sun spiders (solpugids) although the latter are not true spiders as they belong to a different order. [ [http://www.zoo.org/factsheets/spiders/giant.html Tegenaria duellica fact sheet] ] This species has been seen in humid areas.

Relationship with the Hobo spider

An established population of Giant house spiders is generally considered to be a deterrent to the establishment of a Hobo spider population. Giant house spiders compete with Hobo spiders for the same resources. Male Giant house spiders will often kill Hobo spiders and will not hesitate to make a meal of one.Hobo spiders grow no more than 1 1/2 inches long as where the giant house spider can grow to the length of convert|4|in|mm.

Taxonomy

This species was referred to as "Tegenaria gigantea" until 1995, when it was first realized that this name was a synonym of "T. duellica" (published in 1875), making the latter the oldest available name. Other authors suggested that "T. gigantea" was a synonym of "T.saeva", but molecular evidence indicates that these are distinct taxa, not synonyms [P. J. P. Croucher, G. S. Oxford, J. B. Searle (2004) Mitochondrial differentiation, introgression and phylogeny of species in the "Tegenaria atrica" group (Araneae: Agelenidae). Biological Journal of the Linnean Society 81: 79–89. doi:10.1111/j.1095-8312.2004.00280.x] .

References

External links

* [http://hobospider.org/european.html Tegenaria species information]