Hobo or giant house spider? Bigger than a euro coin. Bozeman, Montana.


House spiders of the genus Tegenaria are fast-running brownish funnel-web weavers that occupy much of the Northern Hemisphere except for Japan and Indonesia. Of all agelenids, Tegenaria possesses the largest species of funnel weavers: the Cardinal spider (T. parietina), whose species' females reach 18 mm in body size. Up until very recently, the genus contained several more species which have now been removed into different genera; in particular, the recently described genus Eratigena, which now contains both the giant house spider (Eratigena atrica) and the infamous hobo spider (Eratigena agrestis).

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