Pteryx is a genus of beetles that is typically found in northern bogs in the Northern Hemisphere. They belonging to the family Ptiliidae which is referred to as feather-winged beetles as the hindwings are narrow and feather-like. Like most of the rest of the family, Pteryx are very small and live in rotting vegetative matter. They prefer rotting w...
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http://en.wikipedia.org/wiki/Pteryx
Pteryx is a genus of featherwing beetles, Ptiliidae, occurring in two forms: one is darker in colour with well developed wings and large eyes; the other is lighter, wingless and has smaller eyes. Both forms live in rotting wood and under bark.
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http://www.probertencyclopaedia.com/browse/BPA.HTM
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