Included taxa
Kaston, B. J. (1946). North American spiders of the genus Ctenium. American Museum Novitates 1306: 1-19. 
Species
| Species | Family | Page / figures | published as |
|---|---|---|---|
| Robertus banksi | Theridiidae | 5, f. 1-8, 49 (Dmf) | Ctenium banksi |
| Robertus borealis | Theridiidae | 6, f. 41-43, 50 (Dmf) | Ctenium borealis |
| Robertus crosbyi | Theridiidae | 7, f. 52 (Df) | Ctenium crosbyi |
| Robertus eremophilus | Theridiidae | 7, f. 26-28, 54 (f, Dm) | Ctenium eremophilus |
| Robertus floridensis | Theridiidae | 7, f. 48 (Df) | Ctenium floridensis |
| Robertus frontatus | Theridiidae | 7, f. 35-37, 51 (mf, T from Microneta, S of Robertus terrestris) | Ctenium frontata |
| Robertus fuscus | Theridiidae | 8, f. 38-40, 56 (mf, T from Robertus) | Ctenium fusca |
| Robertus laticeps | Theridiidae | 9, f. 14-16, 46 (mf, S of Robertus laticeps) | Ctenium laticeps |
| Robertus lividus | Theridiidae | 9, f. 17-19, 58 (mf) | Ctenium livida |
| Robertus longipalpus | Theridiidae | 10, f. 20-22, 47 (Dmf) | Ctenium longipalpus |
| Robertus pumilus | Theridiidae | 10, f. 32-34, 53 (mf) | Ctenium pumilus |
| Robertus riparius | Theridiidae | 11, f. 11-13, 44 (mf) | Ctenium riparius |
| Robertus similis | Theridiidae | 12, f. 45 (Df) | Ctenium similis |
| Robertus spinifer | Theridiidae | 12, f. 23-25, 57 (mf) | Ctenium spiniferus |
| Robertus vigerens | Theridiidae | 13, f. 9-10, 29-31, 55 (mf) | Ctenium vigerens |
Genera
No genus found for this reference