Rubrius is a genus of South American spiders in the family Macrobunidae first described by Eugène Simon in 1887.
Species , the genus contains seven species found in Chile and Argentina: Rubrius annulatus F. O. Pickard-Cambridge, 1899 – Chile Rubrius antarcticus (Karsch, 1880) – Chile, Argentina Rubrius castaneifrons (Simon, 1884) – Chile Rubrius lineatus Roth, 1967 – Chile Rubrius major (Simon, 1904) – Chile Rubrius scottae Mello-Leitão, 1940 – Argentina Rubrius ululus Roth, 1967 – Chile
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