Key to the species Cladophoropsis
| 1 | Filament diameters characteristically more than 400 µm , secondary attachment from ends of branches or by rhizoids developing laterally on segments | C. herpestica |
| 1 | Filament diameters mostly less than 300 µm , secondary attachment by specialized structures forming terminally or laterally from rhizoids | 2 |
| 2 | Filament diameters mostly 80 - 100 µm, secondary attachments infrequent | C. sundanensis |
| 2 | Filament diameters mostly 150 - 300 µm, secondary attachments frequent | C. membranacea |