Abstract
Opiliones is a diverse order of arachnids, with more than 6500 described species (Kury, 2003). Even so, the known diversity of tropical faunas such as the Bolivian and Peruvian are probably underestimated (Kury, 2003). Cosmetidae Koch, 1839 is one of the most diverse families of the order, with 125 genera and more than 700 described species distributed in the Antilles and from the souther…