Kingdom Plantae Haeckel (1866) - plants Subkingdom Rhodoplantae G.W.Saunders & Hommers. (2004) Phylum Rhodophyta Wettst. (1901) - red algae Subphylum Eurhodophytina G.W.Saunders & Hommers. (2004) Class Florideophyceae Cronquist (1960) Subclass Rhodymeniophycidae G.W.Saunders & Hommers. (2004) Order Gigartinales F.Schmitz Family Polyideaceae Kylin (1956) see Family Polyidaceae Kylin (1956), nom. cons.