| Ectocarpus ensenadanus N.L. Gardner, 1940 |
| Ectocarpus eramosus Setch. & N.L. Gardner, 1922 |
| Ectocarpus flagelliformis Kütz., 1843 |
| Ectocarpus flocculiformis Setch. & N.L. Gardner, 1922 |
| Ectocarpus gonodioides Setch. & N.L. Gardner, 1924 |
| Ectocarpus granulosoides Setch. & N.L. Gardner, 1922 |
| Ectocarpus granulosoides var. pygmaeus Setch. & N.L. Gardner, 1937 |
| Ectocarpus granulosus (Sm.) C. Agardh, 1828 |
| Ectocarpus granulosus f. corticulatus (D.A. Saunders) Collins, 1909 |
| Ectocarpus hancockii E.Y. Dawson, 1944 |
| Ectocarpus hemisphaericus D.A. Saunders, 1898 |
| Ectocarpus heterocarpus P. Crouan & H. Crouan, 1878 |
| Ectocarpus indicus Sond., 1854 |
| Ectocarpus irregularis Kütz., 1845 |
| Ectocarpus lumbricalis Kütz., 1845 |
| Ectocarpus mesogloiae Setch. & N.L. Gardner, 1922 |
| Ectocarpus mitchelliae Harv., 1852 |
| Ectocarpus mucronatus Saunders, 1898 |
| Ectocarpus parvus (Saunders) Hollenberg, 1971 |
| Ectocarpus pygmaeus Aresch., 1872 |