Included taxa
Hickman, V. V. (1939a). On a dipneumone spider (Risdonius parvus, gen. et sp. n.), the female of which has reduced palpi. Proceedings of the Zoological Society of London (B) 108: 655-660. 
Species
| Species | Family | Page / figures | published as |
|---|---|---|---|
| Risdonius parvus | Anapidae | 656, pl. 1-3, f. 1-14 (Dmf) | Risdonius parvus |
Genera
| Genus | Family | Page |
|---|---|---|
| Risdonius Hickman, 1939 | Anapidae | ? |