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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Icerya ： ウィキペディア英語版 Icerya ''Icerya'' is a genus of scale insects in the family Monophlebidae. ==Hermaphroditism== Hermaphroditism is extremely rare in the insect world despite the comparatively common nature of this condition in the crustaceans. Several species of ''Icerya'', including the pestiferous cottony-cushion scale, ''Icerya purchasi'', are known to be hermaphrodites that reproduce by self-fertilising. Occasionally reproductively functioning males are produced from unfertilised eggs but generally individuals are monoecious and with a female-like nature but possessing an ovotestis which is part testis part ovary and sperm is transmitted ovarially from the female to her young.〔(THE EVOLUTION OF ALTERNATIVE GENETIC SYSTEMS IN INSECTS ).〕 This hermaphroditic sexual self-sufficiency where a single individual can populate new territory has contributed to the invasive spread of the cottony-cushion scale insect away from its native Australia.〔The Insects An outline of Entomology, Gullan & Cranston, Wiley-Blackwell 2001〕 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「Icerya」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.