Included taxa
Mello-Leitão, C. F. de (1935c). Tres novas aranhas tetrapneumones nas colleccoes do Instituto Butantan. Memórias do Instituto Butantan 9: 355-360. 
Species
| Species | Family | Page / figures | published as |
|---|---|---|---|
| Homoeomma hirsutum | Theraphosidae | 359, f. 5-8 (Dm) | Butantania hirsuta |
| Pycnothele perdita | Pycnothelidae | 356, f. 2-4 (Dm) [urn:lsid:nmbe.ch:spidersp:039411] | Heteromma anomala |
| Trechona uniformis | Dipluridae | 355, f. 1 (Dm) | Trechona uniformis |
Genera
| Genus | Family | Page |
|---|---|---|
| Butantania Mello-Leitão, 1935 | Theraphosidae | 358 |
| Heteromma Mello-Leitão, 1935 | Pycnothelidae | 356 |