Taxa included

Pierce, W.D. (1950). Fossil arthropods from onyx marble. Bulletin of the Southern California Academy of Sciences 49: 101–104.

Taxon
Onychothelyphonus Pierce, 1950 (Schizomida: Hubbardiidae) 102–103, Onychothelyphonus
Onychothelyphonus bonneri Pierce, 1950 (Schizomida: Hubbardiidae) 103–104, figs 1, 1a, Onychothelyphonus bonneri