Taxa included

Legg, G. (1975b). The genitalia and associated glands of five British species belonging to the family Chthoniidae (Pseudoscorpiones: Arachnida). Journal of Zoology, London 177: 99–121.

Chthonius ischnocheles (Hermann, 1804) (Pseudoscorpiones: Chthoniidae) 100, figs 1a, 2, 7a, 9a–c, 10a–b, 11a–b, Chthonius ischnocheles (Hermann)
Chthonius tenuis L. Koch, 1873 (Pseudoscorpiones: Chthoniidae) 100, figs 1b, 3, 7e, 12a–b, Chthonius tenuis
Ephippiochthonius tetrachelatus (Preyssler, 1790) (Pseudoscorpiones: Chthoniidae) 101, figs 1d, 5, 7d, 14a–b, Chthonius (Ephippiochthonius) tetrachelatus (Preyssler)
Chthonius orthodactylus (Leach, 1817) (Pseudoscorpiones: Chthoniidae) 101, figs 1c, 4, 7c, 13a–b, Chthonius orthodactylus (Leach)
Ephippiochthonius kewi (Gabbutt, 1966) (Pseudoscorpiones: Chthoniidae) 101, figs 1e, 6, 7b, 15a–b, Chthonius kewi Gabbutt