Deleaster is a genus of beetles belonging to the family Staphylinidae.

The species of this genus are found in Europe, Asia, Oceania, Africa and North America.

Species: Deleaster dichrous (Gravenhorst, 1802) Deleaster gibbus Cuccodoro & Makranczy, 2013 Deleaster obscuricollis Coiffait, 1979 Deleaster pectinatus Fauvel, 1882 Deleaster negus Cuccodoro & Makranczy, 2013 Deleaster taiwanensis Hayashi, 1984 Deleaster wilhelmensis

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