Phthorarcha is a genus of moths in the family Geometridae described by Edward Meyrick in 1892.Viidalepp, Jaan. Checklist of the Geometridae (Lepidoptera) of the former U.S.S.R. Stenstrup, Denmark: Apollo Books, 1998. 11.
Species Phthorarcha ishkovi Viidalepp, 1986 Phthorarcha primigena Staudinger, 1895
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