Posterior of the two basic parts of the body of a mite or tick, bearing the legs and most internal organs.
Idiosoma is a genus of trapdoor spiders in the family Idiopidae with three species, found only in Western Australia. The genus was transferred from Ctenizidae to Idiopidae in 1985. Idiosoma nigrum, commonly called the Black rugose trapdoor spider, can grow up to 30 mm long. Males reach a body size of up to 18 mm. The skin of their opisthosoma is h...Found on http://en.wikipedia.org/wiki/Idiosoma
(from the article `acarid`) Behind the gnathosoma is a large region (idiosoma) that bears the legs, the genital and anal openings, and an assortment of tactile and sensory ...Found on http://www.britannica.com/eb/a-z/i/6
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