| Name | Rivularia rigida Kützing |
| Authorship | Kützing |
| Rank | Species |
| Placed in | Rivularia C. Agardh ex Bornet & Flahault |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Rivularia rigida Kützing |
| Identification made in | [no date] (1) |
| Name | Rivularia rigida Kützing |
| Authorship | Kützing |
| Rank | Species |
| Placed in | Rivularia C. Agardh ex Bornet & Flahault |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Rivularia rigida Kützing |
| Identification made in | [no date] (1) |