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''Polyrhachis'' is a genus of formicine ants found in the Old World with a large number of species (over 600).〔 The genus is yet to be comprehensively resolved and contains many varied species including nest weavers (e.g. ''Polyrhachis dives''), swimming workers (e.g. ''Polyrhachis sokolova''), soil (e.g. ''Polyrhachis proxima'') and tree dwellers (e.g. ''Polyrhachis bicolor''). ==General morphology== Size: Workers range in size approx 5-10mm in length. Eyes developed, no ocelli. Antennae have 12-segments. Antennal insertions situated far from posterior margin of clypeus. Mesosoma of most species have spines on one or more of its pronotal, mesonotal or propodeal components. Petiole armed with spines or teeth. First gastral tergite well developed, longer in dorsal view than exposed parts of the following terga together. Opening at gastral apex for release of venom lacking a radial fringe of hairs. 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「Polyrhachis」の詳細全文を読む スポンサード リンク
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