Ashmole, N.P., Oromí, P., Ashmole, M.J. & Martín, J.L. (1996). The invertebrate fauna of early successional volcanic habitats in the Azores. Boletim do Museu Municipal do Funchal 48: 5–39.
| Taxon | |
|---|---|
| Chthonius ischnocheles (Hermann, 1804) (Pseudoscorpiones: Chthoniidae) | 18, Chthonius (Chthonius) ischnocheles (Hermann) |
| Ephippiochthonius tetrachelatus (Preyssler, 1790) (Pseudoscorpiones: Chthoniidae) | 18, Chthonius (Ephippiochthonius) tetrachelatus (Preyssler) |
| Ephippiochthonius kewi (Gabbutt, 1966) (Pseudoscorpiones: Chthoniidae) | 18, Chthonius (Ephippiochthonius) kewi Gabbutt |