Graycassis is a genus of Australian white tailed spiders that was first described by Norman I. Platnick in 2000.
Species it contains ten species: Graycassis barrington Platnick, 2000 – Australia (New South Wales) Graycassis boss Platnick, 2000 – Australia (New South Wales) Graycassis bruxner Platnick, 2000 – Australia (New South Wales) Graycassis bulga Platnick, 2000 – Australia (New South Wales) Graycassis chichester Platnick, 2000 – Australia (Queensland, New South Wales) Graycassis dorrigo Platnick, 2000 – Australia (New South Wales) Graycassis enfield Platnick, 2000 – Australia (New South Wales) Graycassis marengo Platnick, 2000 (type) – Australia (New South Wales) Graycassis scrub Platnick, 2000 – Australia (New South Wales) Graycassis styx Platnick, 2000 – Australia (New South Wales)
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