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Rhadine persephone : ウィキペディア英語版 | Rhadine persephone
''Rhadine persephone'' is a rare species of beetle known by the common name Tooth Cave ground beetle. It is endemic to Texas in the United States, where it occurs in a network of caves outside Austin.〔(''Rhadine persephone''. ) The Nature Conservancy.〕 It is a federally listed endangered species of the United States. This troglobite is a reddish brown beetle about 7 or 8 millimeters long. Its eyes are rudimentary.〔USFWS. (Final rule to determine 5 Texas cave invertebrates to be endangered species. ) ''Federal Register'' September 16, 1988.〕 It lives on the silt on the cave floors, where it runs around seeking food. It digs up and consumes cricket eggs.〔(''Rhadine persephone''. ) Texas Parks & Wildlife.〕 This beetle has been found at 54 locations in karst caves in Travis and Williamson Counties in Texas; three of these locations have since been destroyed.〔USFWS. (''Rhadine persephone'' Five-year Review. ) September 2008.〕 The beetle's survival is threatened by the destruction of its cave habitat, the degradation of the caves by pollution and garbage, and the invasion of fire ants.〔 ==References==
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