Taxa included

Muchmore, W.B. (1968b). Two new species of chthoniid pseudoscorpions from the western United States (Arachnida: Chelonethida: Chthoniidae). Pan-Pacific Entomologist 44: 51–57.

Taxon
Hesperochthonius californicus (Chamberlin, 1929) (Pseudoscorpiones: Chthoniidae) 51, Chthonius (Hesperochthonius) californicus Chamberlin
Hesperochthonius Browning, 1970 (Pseudoscorpiones: Chthoniidae) 51–52, (without valid type species), Chthonius Muchmore
Hesperochthonius oregonicus (Muchmore, 1968) (Pseudoscorpiones: Chthoniidae) 52–54, figs 1–2, Chthonius (Hesperochthonius) oregonicus
Chthonius pacificus Muchmore, 1968 (Pseudoscorpiones: Chthoniidae) 55–57, figs 3–4, Chthonius (Chthonius) pacificus