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''Phidippus clarus'' is a species of jumping spider (family Salticidae) found in old fields throughout eastern North America. It often waits upside down near the top of a plant, which may be useful for detecting prey, and then quickly jumps down before the prey can escape. The spider is one of 60 species in the genus ''Phidippus'', and one of about 5,000 in the Salticidae, a family that accounts for about 10% of all spider species.〔 ''P. clarus'' is a predator, mostly taking insects, other spiders, and other terrestrial arthropods. Like other jumping spiders, it has vision more acute than a cat and ten times more acute than a dragonfly. The eyes are used to locate prey and rivals, and find and court mates. All spiders have sensors for smell, taste, touch and vibration protruding through their cuticle ("skin"). Jumping spiders can leap up to 50 times their own length by powerfully extending the third or fourth pairs of legs, with the longer forelimbs extended to grasp the prey. ''P. clarus'', a relatively large salticid, takes prey up to the size of an adult earwig. In an experiment, ''P. clarus'' was offered as many fruit flies as it could eat, and in four-hour sessions individuals took 17 flies on average – while one took 41. When ''P. clarus'' males compete for females, the winners are those that produce the most vibrations on the surface and those that are largest. Contests between females involve less displaying, and physical fights between females are more likely to end in injury or death. The most successful males choose the largest females, as these produce the most eggs and most quickly. If a female that has mated already then finds a larger male, she will often mate again with the larger male. The average clutch is 135 eggs. Unlike most of the genus ''Phidippus'', ''P. clarus'' females die after one brood has left the nest. ''P. clarus'' is parasitized by the Californian wasp ''Aporinellus completus'' and by mermithid nematodes. In an experiment in 2006, ''P. clarus'' showed promise for controlling the fourlined plant bug, ''Poecilocapsus lineatus'', which severely damages the commercially grown sweet basil. ==Body structure== Jumping spiders have a distinctive rectangular carapace, and that of female ''Phidippus clarus'' average wide, while the carapaces of males average .〔 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「Phidippus clarus」の詳細全文を読む スポンサード リンク
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