Idana is a monotypic genus of picture-winged flies, family Ulidiidae. The sole species is Idana marginata.
Idana marginata is found in the United States and Canada. It is one of the largest ulidiid flies in eastern North America,Marshall, Stephen A. 2006. Insects: Their Natural History And Diversity: With a Photographic Guide to Insects of Eastern North America. Firefly Books Ltd. reaching a length of over .
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