Phthonosema is a genus of moths in the family Geometridae described by Warren in 1894.
Species Phthonosema tendinosaria (Bremer, 1864) Phthonosema invenustaria (Leech, 1891) Phthonosema phantomaria (Graeser, 1880) Phthonosema serratilinea (Leech, 1897)
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