Rhodophyta Saunders & Hommersand

Hildenbrandia rivularis Custom

De stam Rhodophyta Saunders & Hommersand kent 4 substammen.

Cyanidophytina H.S.Yoon, K.M.Müller, R.G.Sheath, F.D.Ott & D.Bhattacharya	Proteorhodophytina Muñoz-Gómez, Mejía-Franco, Durnin, Colp, Grisdale, J.M.Archibald & Slamovits
Eurhodophytina G.W.Saunders & Hommersand