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Texella reyesi : ウィキペディア英語版
Texella reyesi

''Texella reyesi'' is a rare species of arachnid known by the common name Bone Cave harvestman. It is endemic to Texas in the United States, where it lives in subterranean limestone caves in Travis and Williamson Counties. It is threatened by the loss of its habitat.〔 It is a federally listed endangered species of the United States.〔USFWS. (Coffin Cave Mold Beetle (''Batrisodes texanus'') and the Bone Cave Harvestman (''Texella reyesi'') determined to be endangered. ) ''Federal Register'' August 18, 1993.〕
Specimens of this harvestman were once included as members of ''Texella reddelli'', and the two species are closely related. This harvestman was described as a new species in 1992.〔Ubick, D. and T. S. Briggs. (1992). The harvestman family Phalangodidae. 3. Revision of ''Texella'' Goodnight and Goodnight (Opiliones: Laniatores). ''Texas Mem. Mus., Speleol. Monogr.'' 3:155-240.〕
This harvestman is eyeless and pale orange in color.〔 It is 1.4 to 2.7 millimeters long and has long legs.〔(''Texella reyesi''. ) Texas Parks & Wildlife.〕 The lack of eyes and body pigment and the long legs are adaptations for life as a troglobite, an animal which spends its whole life in dark caves.〔USFWS. (''Texella reyesi'' Five-year Review. ) December 2009.〕 It consumes invertebrates.〔 It is sensitive to humidity and cannot tolerate dry conditions. During dry times it seeks the most moist corners of its cave environment.〔〔
This animal is known from 168 karst caves on the Edwards Plateau of Texas.〔 This and other species that live in these cave networks are threatened by a number of processes. The worst threat is the outright loss of its cave habitat, which is destroyed as the land is consumed for urban development. Caves are also altered and polluted so that they cannot support this and other species.〔
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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