kingdom Chromista > subkingdom Harosa > infrakingdom Heterokonta > phylum Ochrophyta > class Phaeophyceae > subclass Fucophycidae > order Ectocarpales > family Ectocarpaceae > genus Ectocarpus > species Ectocarpus pycnocarpus
| Rank | Species |
| Status | unaccepted |
| Aphia ID | urn:lsid:marinespecies.org:taxname:500980 |
| Valid name | Ectocarpus fasciculatus |
| Valid Aphia ID | 145404 |
| Environments | marine |
This status of this taxon in WoRMS is unaccepted. The accepted taxon for Ectocarpus pycnocarpus Rosenvinge, 1893 is Ectocarpus fasciculatus.