Requested reference
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. 
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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. -- Show included taxa