| Arachnida (Class) |
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| Scorpiones (Order) |
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| Bothriuridae Simon, 1880 (Family) |
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| Buthidae (Family) |
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| Buthidae C.L. Koch, 1837 (Family) |
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| Buthidae Simon, 1879 (Family) |
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| Caraboctonidae Kraepelin, 1905 (Family) |
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| Chactidae Pocock, 1893 (Family) |
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| Chaerilidae Pocock, 1893 (Family) |
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| Diplocentridae Pocock, 1893 (Family) |
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| Euscorpiidae Laurie, 1896 (Family) |
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| Ischnuridae Simon, 1879 (Family) |
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| Iuridae Thorell, 1876 (Family) |
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| Liochelidae Fet & Bechly, 2001 (Family) |
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| Microcharmidae Lourenço, 1996 (Family) |
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| Pseudochactidae Gromov, 1998 (Family) |
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| Scorpionidae Latreille, 1802 (Family) |
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| Superstitioniidae Stahnke, 1940 (Family) |
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| Urodacidae Pocock, 1893 (Family) |
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| Vaejovidae Thorell, 1876 (Family) |
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