Dioryctria postmajorella is a species of snout moth in the genus Dioryctria. It was described by Herbert H. Neunzig in 1996 and is known from the Dominican Republic.

The length of the forewings is 12–15 mm.New species of Phycitinae (Lepidoptera: Pyralidae) from the Dominican Republic

The larvae possibly feed on Pinus occidentalis.

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