| Opiliones (Order) |
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| Opiliones Cyphophthalmi Simon, 1879 (Suborder) |
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| Sironidae Simon, 1879 (Family) |
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| Holosiro Ewing, 1923 (Genus) |
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| Marwe W. A. Shear, 1985 (Genus) |
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| Metasiro Juberthie, 1960 (Genus) |
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| Odontosiro Juberthie, 1961 (Genus) |
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| Paramiopsalis Juberthie, 1962 (Genus) |
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| Parasiro Hansen & Sørensen, 1904 (Genus) |
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| Siro Latreille, 1796 (Genus) |
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| Suzukielus Juberthie, 1970 (Genus) |
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| Sironidae subfam. Sironinae Hansen & Soerensen, 1904 (Subfamily) |
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| Cyphophthalmus Joseph, 1868 (Genus) |
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| Sironidae subfam. Stylocellinae (Subfamily) |
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