In older texts it has been known as "Cyanidales". It was granted phylum status in the Saunders and Hommersand 2004 classification (as "Cyanidophyta"), but demoted to subphylum in the Yoon et al. classification of 2006.[7]
^Matsuzaki et al. (2004) Genome sequence of the ultrasmall unicellular red alga Cyanidioschyzon merolae 10D. Nature 428: 653-657.
^Nozaki et al. (2007) A 100%-complete sequence reveals unusually simple genomic features in the hot-spring red alga Cyanidioschyzon merolae. BMC Biology 5:28.
^Ciniglia et al. (2004) Hidden biodiversity of the extremophilic Cynidiales red algae. Molecular Ecology 13: 1827-1838.