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''Dermacentor andersoni'', commonly known as the Rocky Mountain wood tick, is a species of tick. It can cause tick paralysis. This tick is well known as a vector of the Rocky Mountain spotted fever rickettsia in the northwestern U.S. and Canada, the Colorado tick fever virus, and the bacteria which causes tularemia (hunter's disease).〔http://entomology.ucdavis.edu/Faculty/Robert_B_Kimsey/Kimsey_Research/California_Ticks/〕 Diagnostic features: * The larva only has three pairs of legs. * The nymph has four pairs. * A single pair of spiracular openings (stigmata) are seen close to the coxae (leg bases or segments) of the fourth pair of legs (except in larvae). * A terminal capitulum (mouthparts) is visible from above in all hatched stages. * A large sclerite called the scutum is present dorsally behind the capitulum. The scutum almost entirely covers the back of the male, but only partly covers the back of the female. * Eyes, if present, are on the scutum. * Sexual dimorphism in size and colour is frequent. The female is often larger. * The posterior margin of opisthosoma is usually subdivided into sclerites called festoons. * The pedipalps are rigid along the chelicerae, and are not leg-like. ==See also== *Ticks of domestic animals 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「Dermacentor andersoni」の詳細全文を読む スポンサード リンク
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