| Name | Synedra undulata (J. W. Bailey) W. Smith |
| Authorship | (J. W. Bailey) W. Smith |
| Rank | Species |
| Placed in | Synedra Ehrenberg |
| Citation | 1856 Syn. Brit. Diat. 2: 97 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Synedra undulata (J. W. Bailey) W. Smith |
| Identification made in | [no date] (1) |