Orsolobus is a genus of South American araneomorph spiders in the family Orsolobidae, and was first described by Eugène Louis Simon in 1893.
Species it contains nine species, found only in Argentina and Chile: Orsolobus chelifer Tullgren, 1902 – Chile Orsolobus chilensis Forster & Platnick, 1985 – Chile Orsolobus mapocho Forster & Platnick, 1985 – Chile Orsolobus montt Forster & Platnick, 1985 – Chile Orsolobus plenus Forster & Platnick, 1985 – Chile Orsolobus pucara Forster & Platnick, 1985 – Chile, Argentina Orsolobus pucatrihue Forster & Platnick, 1985 – Chile Orsolobus schlingeri Forster & Platnick, 1985 – Chile Orsolobus singularis (Nicolet, 1849) (type) – Chile
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