- Dictyocha speculum Ehrenberg, 1839 accepted as Octactis speculum (Ehrenberg) F.H.Chang, J.M.Grieve & J.E.Sutherland, 2017
- Distephanus octonarius (Ehrenberg) Haeckel (uncertain > unassessed)
- Distephanus speculum (Ehrenberg) Haeckel, 1887 accepted as Octactis speculum (Ehrenberg) F.H.Chang, J.M.Grieve & J.E.Sutherland, 2017
- Egregia menziesii (Turner) Areschoug, 1876
- Fucus radicans L.Bergström & L.Kautsky, 2005
- Octactis octonaria (Ehrenberg) Hovasse, 1946
- Octactis speculum (Ehrenberg) F.H.Chang, J.M.Grieve & J.E.Sutherland, 2017
- Ulkenia profunda A. Gaertner, 1977