Taxa included

Kew, H.W. (1930). On the spermatophores of the Pseudoscorpiones Chthonius and Obisium. Proceedings of the Zoological Society of London 100: 253–256.

Taxon
Chthonius orthodactylus (Leach, 1817) (Pseudoscorpiones: Chthoniidae) 253–256, figs 1c–d, Chthonius orthodactylus (Leach)
Chthonius tenuis L. Koch, 1873 (Pseudoscorpiones: Chthoniidae) 253–256, fig. 1a, Chthonius tenuis
Chthonius rayi L. Koch, 1873 (Pseudoscorpiones: Chthoniidae) 253–256, figs 1b, 2, Chthonius rayi
Obisium muscorum Leach, 1817 (Pseudoscorpiones: Cheliferidae) 253–256, fig. 1e, Obisium muscorum