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 Halymeniales G.W.Saunders & Kraft Family Tsengiaceae Saunders & Kraft (2002)