Osorius is a genus of unmargined rove beetles in the family Staphylinidae. There are about nine described species in Osorius.
Species Osorius brevicornis Notman, 1920 Osorius brevipennis Notman, 1925 Osorius difficilis Notman, 1925 Osorius latipes (Gravenhorst, 1806) Osorius parcus Sharp, 1887 Osorius parviceps Notman, 1925 Osorius planifrons LeConte, 1877 Osorius politus LeConte, 1877 Osorius variolatus Notman, 1925
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