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''Heterocheila'' is a genus of acalyptrate true flies (Diptera). They are placed in their own family, Heterocheilidae, in the superfamily Sciomyzoidea.〔Mathis, Wayne N. World Catalog and Conspectus on the Family Heterocheilidae (Diptera: Schizophora). MYIA, 12:281–289 2011〕 They are not widely familiar outside entomological circles, but the common name "half-bridge flies" has been associated with them.〔McAlpine, D. K. 1991. Relationships of the genus Heterocheila (Diptera: Sciomyzoidea) with description of a new family. Tijdschr. Ent. 134: 193-199. () (online )〕 They are medium-sized flies occurring mainly in temperate regions on seashores of the Northern Hemisphere, where they and their larvae typically feed on stranded kelp in the wrack zone. In this, they resemble the so-called kelp flies, which are members of a different family, though the same superfamily. The family Heterocheilidae was established by McAlpine in 1991.〔 He distinguished it from other families to which ''Heterocheila'' had hitherto been referred at various times and by various authorities〔McAlpine, D. K. 1998. Chapter 33. Family Heterocheilidae. Manual Palaearct. Dipt. 3: 345-347. ()〕 – Helcomyzidae, Dryomyzidae and Coelopidae.〔()〕 ==Description== For terms see Morphology of Diptera Heterocheilidae are medium to moderately large flies (body length 4.2-6.5 mm fairly robust, brown flies The postverical bristles are long and often parallel. There are three fronto-orbital bristles The acrostichal bristles are in a single row with a larger prescutellar pair; metepisternum bare; The prosternum is triangular, and extended laterally to the propleuron as a narrow, precoxal bridge. The costa is unbroken and the crossveins are unmarked.The mid region of costa lacks anteroventral spines.The apical section of vein M is nearly straight, terminating posterior of wing apex.Crossvein Bm-Cu is almost aligned with vein CuA2. Vein CuA2+A1 reaches the wing margin. 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「Heterocheila」の詳細全文を読む スポンサード リンク
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