Taxa included

Balzan, L. (1890). Revisione dei Pseudoscorpioni del Bacino dei Fiumi Paranà e Paraguay nell'America meridionale. Annali del Museo Civico di Storia Naturale di Genova (2a) 9: 401–454.

Taxon
Cheiridium Menge, 1855 (Pseudoscorpiones: Cheiridiidae) 409–410, Cheiridium
Cheliferidae Risso, 1827 (Pseudoscorpiones) 409, Cheliferidae
Neocheiridium corticum (Balzan, 1887) (Pseudoscorpiones: Cheiridiidae) 410–411, figs 1, 1a–c, Cheiridium corticum
Chelifer Geoffroy, 1762 (Pseudoscorpiones: Cheliferidae) 411–412, Chelifer
Odontochernes cervus (Balzan, 1888) (Pseudoscorpiones: Chernetidae) 412–414, figs 2, 2a, Chelifer cervus (Balzan)
Lustrochernes argentinus (Thorell, 1877) (Pseudoscorpiones: Chernetidae) 414–416, figs 3, 3a–b, Chelifer argentinus
Gomphochernes communis (Balzan, 1888) (Pseudoscorpiones: Chernetidae) 416–417, figs 4, 4a–b, Chelifer communis (Balzan)
Paratemnoides nidificator (Balzan, 1888) (Pseudoscorpiones: Atemnidae) 417–418, figs 5, 5a–b, Chelifer nidificator (Balzan)
Pachychernes robustus (Balzan, 1888) (Pseudoscorpiones: Chernetidae) 418–420, figs 6, 6a–b, Chelifer robustus (Balzan)
Parachernes brevifemoratus Balzan, 1887 (Pseudoscorpiones: Chernetidae) 420–421, figs 7, 7a–c, Chelifer brevifemoratus
Parachernes (Parachernes) crassimanus (Balzan, 1887) (Pseudoscorpiones: Chernetidae) 421–424, figs 8, 8a–c, Chelifer crassimanus
Gigantochernes rudis (Balzan, 1887) (Pseudoscorpiones: Chernetidae) 423–424, figs 9, 9a–c, Chelifer rudis
Rhopalochernes germainii (Balzan, 1887) (Pseudoscorpiones: Chernetidae) 424–426, figs 10, 10a–c, Chelifer germainii
Neowithius exilimanus (Balzan, 1887) (Pseudoscorpiones: Withiidae) 426–427, figs 11, 11a–b, Chelifer exilimanus
Pseudopilanus foliosus (Balzan, 1887) (Pseudoscorpiones: Chernetidae) 427–428, figs 12, 12a–c, Chelifer foliosus
Cacodemonius segmentidentatus (Balzan, 1887) (Pseudoscorpiones: Withiidae) 428–430, figs 13, 13a–b, Chelifer segmentidentatus
Dolichowithius (Dolichowithius) canestrinii (Balzan, 1887) (Pseudoscorpiones: Withiidae) 430–431, figs 14, 14a–c, Chelifer canestrinii
Victorwithius rufus (Balzan, 1887) (Pseudoscorpiones: Withiidae) 431–432, figs 15, 15a–b, Chelifer rufus
Dolichowithius (Dolichowithius) longichelifer (Balzan, 1887) (Pseudoscorpiones: Withiidae) 433–434, figs 16, 16a–c, Chelifer longichelifer
Olpium L. Koch, 1873 (Pseudoscorpiones: Olpiidae) 434–435, Olpium
Progarypus oxydactylus (Balzan, 1887) (Pseudoscorpiones: Hesperolpiidae) 435–436, figs 17, 17a–b, Olpium oxydactylum
Progarypus ramicola (Balzan, 1887) (Pseudoscorpiones: Hesperolpiidae) 436–437, figs 18, 18a–c, Olpium ramicola
Olpiolum elegans (Balzan, 1887) (Pseudoscorpiones: Olpiidae) 437–438, figs 19, 19a–b, Olpium elegans
Pachyolpium crassichelatum (Balzan, 1887) (Pseudoscorpiones: Hesperolpiidae) 439–440, figs 20, 20a–b, Olpium crassichelatum
Pachyolpium brevifemoratum (Balzan, 1887) (Pseudoscorpiones: Hesperolpiidae) 440–441, figs 21, 21a–b, Olpium brevifemoratum
Garypus L. Koch, 1873 (Pseudoscorpiones: Garypidae) 441, Garypus
Geogarypus cuyabanus (Balzan, 1887) (Pseudoscorpiones: Geogarypidae) 441–443, figs 22, 22a, Garypus cuyabanus
Obisiidae Sundevall, 1833 (Pseudoscorpiones) 443, Obisiidae
Ideoroncus Balzan, 1887 (Pseudoscorpiones: Ideoroncidae) 443–444, Ideoroncus
Ideoroncus pallidus Balzan, 1887 (Pseudoscorpiones: Ideoroncidae) 444–445, figs 23, 23a–b, Ideoroncus pallidus
Lechytia chthoniiformis (Balzan, 1887) (Pseudoscorpiones: Chthoniidae) 445–446, figs 24, 24a, Roncus chthoniiformis
Roncus L. Koch, 1873 (Pseudoscorpiones: Neobisiidae) 445, Roncus
Chthonius C.L. Koch, 1843 (Pseudoscorpiones: Chthoniidae) 446–447, Chthonius
Tridenchthonius parvidentatus (Balzan, 1887) (Pseudoscorpiones: Chthoniidae) 447–448, figs 25, 25a, Chthonius parvidentatus
Sororoditha hirsuta (Balzan, 1887) (Pseudoscorpiones: Chthoniidae) 448–449, figs 26, 26a, Chthonius hirsutus
Anisoditha curvidigitata (Balzan, 1887) (Pseudoscorpiones: Chthoniidae) 449–450, figs 27, 27a, Chthonius curvidigitatus
Tridenchthonius parvulus Balzan, 1887 (Pseudoscorpiones: Chthoniidae) 450–451, figs 28, 28a, Tridenchthonius parvulus
Tridenchthonius Balzan, 1887 (Pseudoscorpiones: Chthoniidae) 450, Tridenchthonius