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''Crossopriza lyoni'' is a widespread species of cellar spiders that prefer to live in or around human structures. They are commonly known as tailed cellar spiders, tailed daddy longlegs spiders, and sometimes box spiders. They all possess extremely long fragile legs that can reach up to long and a body length of that ranges from . Their abdomens are distinctly squarish when viewed from the side and their carapace is more or less circular when viewed from above. They also possess two kinds of sound-producing organs and have six eyes. The original range of ''C. lyoni'' is unknown. They have been introduced into other parts of the world accidentally and are now pantropical in distribution. They are a regulated species in some countries and are often regarded as pests due to the large amounts of unsightly webs they construct inside human homes. Some people, however, regard them as beneficial, as they are efficient predators of mosquitoes and other arthropods. They are harmless to humans. ==Taxonomy and nomenclature== ''Crossopriza lyoni'' are classified under the genus ''Crossopriza'' and the subfamily Holocneminae. They belong to the cellar spider family (Pholcidae).〔 They are commonly referred to as tailed daddy longlegs spiders, tailed cellar spiders, or (more rarely) box spiders. ''C. lyoni'' and other cellar spiders are also often confused with two other invertebrates - the harvestmen (order Opiliones) and the crane flies (family Tipulidae) - both of which are also known as 'daddy longlegs'. However, they are not closely related to cellar spiders — the latter is a fly; and the former, while also an arachnid, is not a spider at all. The species was first formally described in 1867 by the British naturalist John Blackwall from a collection of spiders from Meerut, Agra, and Delhi. They came from Francis Lyon, a captain of the Royal Artillery of the British Empire stationed in India. They were sent to his sister who presented them to Blackwall at the suggestion of a mutual friend. Blackwall named the spider after Captain Lyon and expressed a hope that others may follow Lyon's example in collecting specimens from foreign countries for the benefit of science. He classified the species under the genus ''Pholcus''.〔 In 1892, the French arachnologist Eugène Simon erected the genus ''Crossopriza'' and subsequently reclassified ''Pholcus lyoni'' to ''Crossopriza lyoni''. Blackwall also described a curious case of hermaphroditism in one adult specimen, in which the left side was male and the right side was female. 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「Crossopriza lyoni」の詳細全文を読む スポンサード リンク
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