Included taxa
Mello-Leitão, C. F. de (1944a). Algumas aranhas da região amazônica. Boletim do Museu Nacional do Rio de Janeiro (N.S., Zool.) 25: 1-12. 
Species
| Species | Family | Page / figures | published as |
|---|---|---|---|
| Argiope carvalhoi | Araneidae | 8 (Df) | Mecynogea carvalhoi |
| Epicadus pulcher | Thomisidae | 11 (Df) [urn:lsid:nmbe.ch:spidersp:031757] | Tobias epicadoides |
| Ibotyporanga naideae | Pholcidae | 6 (Df) | Ibotyporanga naideae |
| Micrathena pungens | Araneidae | 9 (Df) | Micrathena carvalhoi |
| Ochyrocera cornuta | Ochyroceratidae | 5 (Df) | Ochyrocera cornuta |
| Opas caudata | Tetragnathidae | 9 (Df) | Mecynometa caudata |
| Opas melanoleuca | Tetragnathidae | 8 (Df) | Mecynometa melanoleuca |
| Otiothops pilleus | Palpimanidae | 7 (Dm; preoccupied by Simon, 1887) | Otiothops amazonicus |
| Selenops maranhensis | Selenopidae | 12 (Dm) | Selenops saprophilus |
| Tmarus aberrans | Thomisidae | 10 (Df) | Tmarus aberrans |
Genera
| Genus | Family | Page |
|---|---|---|
| Ibotyporanga Mello-Leitão, 1944 | Pholcidae | 6 |