Subclass Rhodymeniophycidae (red algae)
Florideophyceae - Rhodymeniophycidae - Rhodymeniophycidae
Parent taxon: Florideophyceae according to C. W. Schneider and M. J. Wynne 2007
Sister taxa: Ahnfeltiophycidae, Corallinophycidae, Corallinophycidea, Cryptonemiales, Dawsoniolithon, Hildenbrandiophycidae, Nemaliophycidae, Prismostylus
Subtaxa: Acrosymphytales Bonnemaisoniales Ceramiales Gelidiales Gigartinales Gracilariales Halymeniales Nemastomatales Plocamiales Rhodymeniales Sebdeniales