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''Anchylorhynchus'' is a genus of weevils belonging the family Curculionidae and subfamily Curculioninae. It currently includes 22 described species distributed from Panama to Argentina. Members of the genus are pollinators of palms in the genera ''Syagrus'', ''Oenocarpus'' and ''Butia'', with adults living in inflorescences and larvae feeding on developing fruits. The first instar larvae of ''Anchylorhynchus'' have an unusual morphology, being specialized on killing other larvae infesting the palm fruits. ==Adult morphology== ''Anchylorhynchus'' can be readily distinguished from other Derelomini by a number of features. The body is round, convex, and densely covered by scales varying from yellow to black. The rostrum is flattened dorso-verntrally at the apex, and exhibits 2-7 longitudinal grooves from the base of the rostrum to the insertion of antennae. The antennal funicle (segments excluding the first and the club) has only six segments, as opposed to seven segments in other genera. The antennae are inserted at the apex of the rostrum in both sexes, while it is inserted closer to the base in most other Curculionidae (at least in females). Species of ''Anchylorhynchus'' are sexually dimorphic, with males usually being larger than females. In some species, males also have longer tarsi, and/or denser and longer hairs in the ventrites, metasternum and tarsi. In all described species, females have a retraction in ventrites III-IV of the abdomen. The shape and degree of retraction varies between species, but these segments are always flat in males. Anchylorhynchus vanini female dorsal.png|''A. vanini'', female, dorsal Anchylorhynchus vanini female ventral.png|''A. vanini'', female, ventral Color variation in Anchylorhynchus eriospathae.png|Color polymorphism in ''A. eriospathae'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Anchylorhynchus」の詳細全文を読む スポンサード リンク
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