Taxa included

Pratt, H.S. (1927). A manual of the common invertebrate animals exclusive of insects. A.C. McClurg and Co., Chicago.

Taxon
Cheliferidae Risso, 1827 (Pseudoscorpiones) 409, Cheliferidae
Zaona biseriatum (Banks, 1895) (Pseudoscorpiones: Chernetidae) 409, Chelifer biseriatum
Chelifer Geoffroy, 1762 (Pseudoscorpiones: Cheliferidae) 409, Chelifer
Chelifer cancroides (Linnaeus, 1758) (Pseudoscorpiones: Cheliferidae) 409, figs 645a–b, Chelifer cancroides (Linnaeus)
Pseudoscorpiones de Geer, 1778 409, (as Pseudoscorpionida), Pseudoscorpiones de Geer
Obisium muscorum Leach, 1817 (Pseudoscorpiones: Cheliferidae) 410, Obisium muscorum
Epactiochernes tristis (Banks, 1891) (Pseudoscorpiones: Chernetidae) 410, Chelanops tristis
Neobisium Chamberlin, 1930 (Pseudoscorpiones: Neobisiidae) 410, Obisium Illiger
Chthonius pennsylvanicus Hagen, 1868 (Pseudoscorpiones: Chthoniidae) 410, (synonymised by Chamberlin, 1929a: 72), Chthonius pennsylvanicus
Americhernes oblongus (Say, 1821) (Pseudoscorpiones: Chernetidae) 410, Chelanops oblongus (Say)
Chernes sanborni Hagen, 1868 (Pseudoscorpiones: Chernetidae) 410, Chelanops sanborni (Hagen)
Parachelifer muricatus (Say, 1821) (Pseudoscorpiones: Cheliferidae) 410, Chelifer muricatus
Chthonius C.L. Koch, 1843 (Pseudoscorpiones: Chthoniidae) 410, Chthonius
Obisiidae Sundevall, 1833 (Pseudoscorpiones) 410, Obisiidae