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 |