Pierce, W.D. (1951). Fossil arthropods from onyx-marble. Bulletin of the Southern California Academy of Sciences 50: 34–49.
| Taxon | |
|---|---|
| Calcitro fisheri Petrunkevitch, 1945 (Schizomida: Calcitronidae) | 40, figs 1–2, 5–6, Calcitro fisheri |
| Onychothelyphonus bonneri Pierce, 1950 (Schizomida: Hubbardiidae) | 40, fig. 3, Onychothelyphonus bonneri |
| Calcoschizomus Pierce, 1951 (Schizomida: Hubbardiidae) | 41, Calcoschizomus |
| Calcoschizomus latisternum Pierce, 1951 (Schizomida: Hubbardiidae) | 41, figs 4, 7, Calcoschizomus latisternum |