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''Steatoda grossa'', commonly known as the cupboard spider, the dark comb-footed spider, the brown house spider (in Australia), or the false black widow (though several other species are known by these names), is a common species of spider in the genus ''Steatoda''. It is a cosmopolitan species found in many parts of the world, including North America, Australasia, and Europe. As one of this spider's common names indicates, the spider superficially resembles, and is frequently confused for, the black widow and other venomous spiders in the genus ''Latrodectus''. == Description == Like black widows, the female ''S. grossa'' is 6-10.5 mm in length and dark colored with a round, bulbous abdomen. Typical coloration ranges from purplish-brown to black, with light-colored markings. Unlike black widows, redbacks, and other ''Latrodectus'' species, ''S. grossa'' does not have a bright red hourglass pattern or any other bright markings. Like many spiders, the male is sometimes smaller but can many times be nearly as long as the females. It measures 4.1-10.0 mm in length and is thinner than the female. The two sexes are colored similarly; however, the sexually mature male almost always has lighter, more reddish-coloured legs than the female. ''S. grossa'' spiders may shed up to six times (instars) before reaching maturity. They can go several months without feeding, provided they have access to water. A well-fed female can lay three or more egg sacs each year. Each egg sac typically contains between 40-100 eggs. The mother can often be observed watching her eggs for hours, even days, at a time once the eggs start changing color and grow close to hatching. At normal household temp/humidity, an egg will usually hatch within a month of being laid. The spiderlings are independent from time of hatch. Female ''S. grossa'' spiders can live up to six years; the typical lifespan for the male is 1-1.5 years. Males often die shortly after mating. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Steatoda grossa」の詳細全文を読む スポンサード リンク
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