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Micrathena
The spider genus ''Micrathena'' contains more than a hundred species, most of them Neotropical woodland orb-weavers. Only three species occur in the eastern United States: females of ''M. gracilis'' (the Spined ''Micrathena'') have five pairs of conical tubercles on the abdomen, female ''M. mitrata'' have two short posterior pairs, and female ''M. sagittata'' (the Arrow-shaped ''Micrathena'') have three pairs. ==References==
* (1850). Descriptions and figures of the araneides of the United States. ''Boston J. nat. Hist.'' 6: 18-35, 271-295.
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「Micrathena」の詳細全文を読む
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