| Name | Ectocarpus paradoxus var. parasitans Schiffner |
| Authorship | Schiffner |
| Rank | Variety |
| Placed in | Ectocarpus paradoxus Montagne |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Ectocarpus paradoxus var. parasitans Schiffner |
| Identification made in | [no date] (1) |