Taxa included

Muchmore, W.B. (1967c). Pseudotyrannochthoniine pseudoscorpions from the western United States. Transactions of the American Microscopical Society 86: 132–139.

Taxon
Spelaeochthonius kobayashii Morikawa, 1956 (Pseudoscorpiones: Pseudotyrannochthoniidae) 134, Pseudotyrannochthonius kobayashii (Morikawa)
Spelaeochthonius kubotai Morikawa, 1954 (Pseudoscorpiones: Pseudotyrannochthoniidae) 134, Pseudotyrannochthonius kubotai (Morikawa)
Pseudotyrannochthonius Beier, 1930 (Pseudoscorpiones: Pseudotyrannochthoniidae) 134, Pseudotyrannochthonius
Pseudotyrannochthonius incognitus (Schuster, 1966) (Pseudoscorpiones: Pseudotyrannochthoniidae) 134, Pseudotyrannochthonius incognitus (R.O. Schuster)
Spelaeochthonius undecimclavatus Morikawa, 1956 (Pseudoscorpiones: Pseudotyrannochthoniidae) 134, Pseudotyrannochthonius undecimclavatus (Morikawa)
Pseudotyrannochthonius newelli Muchmore, 1967 (Pseudoscorpiones: Pseudotyrannochthoniidae) 134–136, figs 1–5 (synonymised by Benedict and Malcolm, 1970: 39), Pseudotyrannochthonius newelli
Pseudotyrannochthonius utahensis Muchmore, 1967 (Pseudoscorpiones: Pseudotyrannochthoniidae) 136–138, figs 6–7, Pseudotyrannochthonius utahensis