Mimachrostia is a genus of moths of the family Erebidae first described by Shigero Sugi in 1982. It was formerly placed in the family Noctuidae.
Species Mimachrostia fasciata Sugi, 1982 Mimachrostia fasciata fasciata Mimachrostia fasciata minimus Fibiger, 2010 Mimachrostia parafasciata Fibiger, 2008 Mimachrostia costafasciata Fibiger, 2008 Mimachrostia novofasciata Fibiger, 2010
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