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The tree trunk spiders are members of the tropical and semi-tropical family Hersiliidae. There are about 150 species in this family. These spiders have two very prominent spinnerets that are almost as long as their abdomen. So they are also sometimes known as "two-tailed spiders". They range in size from about 10 mm (0.4 inch) to 18 mm (0.7 inch) long. Being very well camouflaged for life on the varicolored trunks of trees, they have an interesting way of capturing prey. Rather than making a web that captures prey directly, they lay a light coating of threads over an area of tree bark and wait hidden in plain sight for an insect to stray onto that patch. Once that occurs, they direct their spinnerets toward their prey and circle it; all the while casting silk on it. When the hapless insect has been thoroughly immobilized, they can bite it through its new shroud. ==Genera== * ''Hersilia'' Audouin, 1826 (Africa, Australasia) * ''Hersiliola'' Thorell, 1870 (Mediterranean to Central Asia, Nigeria) * ''Iviraiva'' Rheims & Brescovit, 2004 (South America) * ''Murricia'' Simon, 1882 (South Asia) * ''Neotama'' Baehr & Baehr, 1993 (America, South Africa, India) * ''Promurricia'' Baehr & Baehr, 1993 (Sri Lanka) * ''Tama'' Simon, 1882 (Spain, Portugal, Algeria) * ''Tamopsis'' Baehr & Baehr, 1987 (Australia, Borneo) * ''Tyrotama'' Foord & Dippenaar-Schoeman, 2005 (Africa) * ''Yabisi'' Rheims & Brescovit, 2004 (USA, Caribic) * ''Ypypuera'' Rheims & Brescovit, 2004 (South America) 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「Tree trunk spider」の詳細全文を読む スポンサード リンク
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