Included taxa
Mello-Leitão, C. F. de (1920b). Tetrapneumones trionychias novas do Brasil. Revista de Sciencias 4: 58-60. 
Species
| Species | Family | Page / figures | published as |
|---|---|---|---|
| Actinopus fractus | Actinopodidae | 58 (Dm) | Actinopus fractus |
| Actinopus paranensis | Actinopodidae | 58 (Dm) | Actinopus paranensis |
| Actinopus pusillus | Actinopodidae | 59 (Dm) | Actinopus pusillus |
| Diplura studiosa | Dipluridae | 60 (Dm) | Euharmonicon studiosum |
| Rachias aureus | Pycnothelidae | 59 (Df) | Petropolisia aurea |
Genera
| Genus | Family | Page |
|---|---|---|
| Euharmonicon Mello-Leitão, 1920 | Dipluridae | 60 |
| Petropolisia Mello-Leitão, 1920 | Pycnothelidae | 59 |