Imma phthorosema is a moth in the family Immidae. It was described by Edward Meyrick in 1912. It is found in Colombia.[1]
The wingspan is about 20 mm. The forewings are dark fuscous with some brownish-ochreous strigulation towards the costa at one-fourth and two obscure blackish dots transversely placed in the disc on the end of the cell. The posterior two-fifths of the wing is irregularly and suffusedly strigulated with light brownish ochreous and an interrupted blackish terminal line. The hindwings are rather dark grey.[2]