Taxa included

Muchmore, W.B. (1978). A second species of the genus Mexichthonius (Pseudoscorpionida, Chthoniidae). Journal of Arachnology 6: 155–156.

Taxon
Mexichthonius pacal Muchmore, 1978 (Pseudoscorpiones: Chthoniidae) 155–156, figs 1–3, Mexichthonius pacal