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Giant house spider
The giant house spider (''Eratigena atrica'') is one of the biggest spiders of Central and Northern Europe. Previously belonging to the genus ''Tegenaria'' (aside from ''T. atrica'', it was also documented as ''T. duellica'' or ''T. gigantea'', among others, and was all thought to be different species), it is now a member of the newly described genus ''Eratigena'' 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, and it is generally reluctant to bite, preferring to escape.
==Description==
The two sexes do not differ in coloration or markings. Its coloration is mainly dark brown. On its sternum is a lighter marking, with three light spots on each side. The opisthosoma features a lighter middle line with six "spots" on each side. 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, palps and abdomen. All spiders in the genus Eratigena have uniformly colored legs. In the genus Tegenaria that ''E. atrica'' used to belong to, the legs are annulated or spotted. Female body size can reach in length (despite its name, smaller than ''Tegenaria parietina''), with males having a slightly smaller body at around in length. The female leg span is typically around . The leg span of the male is highly variable, with spans between being common.
Its eight eyes are of equal size and are arranged in two rows. As the eyes contain fewer than 400 visual cells, ''E. atrica'' can probably only distinguish light and dark.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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