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Cooloolidae (order Orthoptera, suborder Ensifera) Family of cricket-like insects, which was first described in 1980 and is known from only one genus and species, Cooloola propator (Cooloola monster), found in south-eastern Queensland, Australia. Its common name refers to its remarkable, robust form, and it is unusual among ensiferans in having short antennae with 10 segments. The structure of the mouth-parts is unique among Orthoptera. C. propator lives in sandy, moist soil. Males wander about on the surface at night, but females appear to be wholly subterranean.

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