Clarification of three species of Discocyrtus Holmberg, 1878 with convoluted taxonomic histories (Opiliones: Laniatores: Gonyleptidae: Pachylinae) - Kury, Adriano B; Pinto da Rocha, Ricardo; Gruber, Jürgen; Carvalho, Rafael N (Journal of Arachnology, 2018)