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Haeckel Florideae.jpg
"Florideae" from Ernst Haeckel's Kunstformen der Natur, 1904
Scientific classification e
Phylum: Rhodophyta
Class: Florideophyceae
Cronquist, 1960[1]

See text.

Florideophyceae, demoted to subclass Florideae in some classification systems, is a class of red algae.[2] It is sometimes merged with the Bangiophyceae into the Rhodophyceae, leaving the subclass Florideae in use.[3] They were once thought to be the only algae to bear pit connections,[4] but these have since been found in the filamentous stage of the Bangiaceae.[5]

"Florideophyceae" is still used by some authorities.[6]

Once thought only to exhibit apical growth, some genera grow by intercalary growth.[5] Most, but not all, genera have three phases to the life cycle.[5]


A Laurencia red alga from Hawaii

There are various classification schemes; see Red algae. One option is to use the following:

Subclass Hildenbrandiophycidae[edit]

Subclass Nemaliophycidae[edit]

Subclass Corallinophycidae[edit]

The subclass Corallinophycidae was introduced in 2007.[7]

Subclass Ahnfeltiophycidae[edit]

Subclass Rhodymeniophycidae[edit]


  1. ^ Cronquist, A. (1960). "The divisions and classes of plants". The Botanical Review. 26 (4): 425–482. doi:10.1007/BF02940572. 
  2. ^ "20. Systematics of the Species Rich Algae". ISBN 0-8493-9579-8.  Missing or empty |title= (help)
  3. ^ http://www.eoearth.org/article/Marine_coralline_algae
  4. ^ Dawes, C. J.; Scott, F. M.; Bowler, E. (1961). "A Light- and Electron-Microscopic Survey of Algal Cell Walls. I. Phaeophyta and Rhodophyta". American Journal of Botany. 48: 925–934. doi:10.2307/2439535. 
  5. ^ a b c Lee, R.E. (2008). Phycology, 4th edition. Cambridge University Press. ISBN 978-0-521-63883-8 
  6. ^ Juliet Brodie; Jane Lewis (Ph. D.) (2007). Unravelling the algae: the past, present, and future of algal systematics. CRC Press. pp. 109–. ISBN 978-0-8493-7989-5. Retrieved 31 January 2011. 
  7. ^ Le Gall L, Saunders GW (June 2007). "A nuclear phylogeny of the Florideophyceae (Rhodophyta) inferred from combined EF2, small subunit and large subunit ribosomal DNA: establishing the new red algal subclass Corallinophycidae". Mol. Phylogenet. Evol. 43 (3): 1118–30. doi:10.1016/j.ympev.2006.11.012. PMID 17197199. 

External links[edit]