Pseudopostega pumila is a moth of the family Opostegidae. It was described by Walsingham, Lord Thomas de Grey, in 1914.Generic Revision of the Opostegidae, with a Synoptic Catalog of the World's Species (Lepidoptera: Nepticuloidea) It is known from Tabasco, Mexico.

The length of the forewings is about 3.2 mm. Adults have been recorded in March.

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