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Cryptorhynchinae
==Description==
The Cryptorhynchinae is a large subfamily of weevils (Curculionidae), with some 6000 species. They are found in most zoogeographic regions although they are most diverse in the Neotropics, Australia and Oceania.
They are distinguished by having their rostrum (snout) backwardly directed between their fore coxae in repose, and fitting within a protective channel that usually ends in a cup-like structure on the mesosternum (ventral mid thoracic segment).〔Lyal, C.H.C. (1993) Coleoptera: Cryptorhynchinae. ''Fauna of New Zealand'' 29. Lincoln, Canterbury. 1–308.〕 The ends of the tibiae also bear an uncus (small hook-like extensions), a character they share with many other groups of Curculionidae that use woody plants for oviposition. For this reason, they are merged into the Molytinae in some treatments.〔Lyal, C.H.C. (2014) 3.7.7 Molytinae Schoenherr, 1823. In: Leschen R.A.B. & Beutel, R.G. (Eds) ''Handbook of Zoology, Coleoptera, Beetles Volume 3: Morphology and Systematics (Phytophaga)''. DeGruyter, Berlin, 529–570.〕
Some species of Cryptorhynchinae are considered agricultural pests, such as the mango seed weevil ''Sternochetus mangiferae'', but the great majority of species live in primary forests, often on deadwood and are threatened by habitat loss. In Europe, the flightless genus ''Acalles'' is most diverse, and restricted to woodlands of long-lasting habitat continuity〔Buse, J., (2012) “Ghosts of the past”: flightless saproxylic weevils (Coleoptera: Curculionidae) are relict species in ancient woodlands. ''Journal of Insect Conservation'' 16 (1), 93–102.〕
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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