Arrhynchus is a genus of small-headed flies in the family Acroceridae. It was formerly considered a synonym of Ocnaea, but was reinstated as a valid genus by Schlinger in 1968. It is endemic to Chile.
Species Arrhynchus maculatus Schlinger, 1968 Arrhynchus meridionalis (Sabrosky, 1946) Arrhynchus penai Schlinger, 1968 Arrhynchus stuardoi (Sabrosky, 1946) Arrhynchus vittatus Philippi, 1871
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