- Dictyocha fibula Ehrenberg, 1839 †
- Dictyocha octonaria Ehrenberg, 1844 accepted as Octactis octonaria (Ehrenberg) Hovasse, 1946
- Dictyocha speculum Ehrenberg, 1839 accepted as Octactis speculum (Ehrenberg) F.H.Chang, J.M.Grieve & J.E.Sutherland, 2017
- Distephanus speculum (Ehrenberg) Haeckel, 1887 accepted as Octactis speculum (Ehrenberg) F.H.Chang, J.M.Grieve & J.E.Sutherland, 2017
- Octactis octonaria (Ehrenberg) Hovasse, 1946
- Octactis speculum (Ehrenberg) F.H.Chang, J.M.Grieve & J.E.Sutherland, 2017
- Pteridomonas danica Patterson & Fenchel