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Hydroscaphidae is a small family of water beetles known commonly as skiff beetles.〔Cai, C., et al. (2012). (The first skiff beetle (Coleoptera: Myxophaga: Hydroscaphidae) from Early Cretaceous Jehol Biota. ) ''Journal of Paleontology'' 86(1), 116-19.〕 As of 2010, there are 23 species in the family.〔Falamarzi, S., et al. (2010). (Confirmed occurrence of ''Hydroscapha granulum'' in Iran, with notes on its biology (Coleoptera: Myxophaga: Hydroscaphidae). ) ''Acta Entomologica Musei Nationalis Pragae'' 50, 97-106.〕 Several are recently described. These beetles are small, most under 2 millimeters in length. They are tan to brown in color and the elytra are abbreviated, leaving several tapering tergites of the abdomen exposed. The wings are fringed with long setae. The larvae are fusiform, with a wide thorax and a narrowing abdomen.〔 These beetles live on mats of algae with a thin layer of running water. This may be the accumulated algae lining the very edge of a stream of water.〔Fikáček, M. and H. Šípková. (2009). (New Asian ''Hydroscapha'', with comments on male-female association of co-occuring species (Coleoptera, Myxophaga, Hydroscaphidae). ) ''Zootaxa'' 2286, 31-48.〕 They tolerate a wide range of temperatures; they have been observed in hot springs and in icy snowmelt. The algae is their food source.〔 The reproductive cycle is not well known. In at least one species the female lays a single large egg on the algal mat.〔 Hydroscaphid species have been reported from every continent except Antarctica. Genera:〔Beutel, R. G. and A. Haas. (1998). (Larval head morphology of ''Hydroscapha natans'' (Coleoptera, Myxophaga) with reference to miniaturization and the systematic position of Hydroscaphidae. ) ''Zoomorphology'' 118(2), 103-116.〕 *''Hydroscapha'' *''Scaphydra'' *''Yara'' ==References== 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「Hydroscaphidae」の詳細全文を読む スポンサード リンク
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