| Name | Sphacelaria britannica Sauvageau |
| Authorship | Sauvageau |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Sphacelaria Lyngbye |
| Remarks | Created from Taxon Name Import: Sphacelaria britannica Sauvageau |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Sphacelaria britannica Sauvageau |
| Identification made in | [no date] (3) |