Orthonevra is a genus of flies in the family Syrphidae They are worldwide in distribution with at least 59 species identified concentrated mainly in eastern North America and Europe. Species of the genus Orthonevra are commonly called mucksuckers after the larvae which have been found in organic rich mud, i.e. muck. This genus belongs to the tribe Brachyopini that includes the prominent genera Melanogaster, Brachyopa, Neoascia and Sphegina.

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