Florideophyceae is a class of red algae.[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] They were also thought only to exhibit apical growth, but there are genera known to grow by intercalary growth.[5] Most, but not all, genera have three phases to the life cycle.[5]

Temporal range:
Haeckel Florideae.jpg
"Florideae" from Ernst Haeckel's Kunstformen der Natur, 1904
Scientific classification e
(unranked): Archaeplastida
Division: Rhodophyta
Subdivision: Eurhodophytina
Class: Florideophyceae
Cronquist, 1960[2]

See text.


A Laurencia red alga from Hawaii

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

Subclass HildenbrandiophycidaeEdit

Subclass NemaliophycidaeEdit

Subclass CorallinophycidaeEdit

The subclass Corallinophycidae was introduced in 2007.[6]

Subclass AhnfeltiophycidaeEdit

Subclass RhodymeniophycidaeEdit

According to molecular clock analysis, Florideophyceae diverged from other red algae about 943 (817–1,049) million years ago. It split into Hildenbrandiophycidae ca. 781 (681–879) mya, Nemaliophycidae ca. 661 (597–736) mya and Corallinophycidae ca. 579 (543–617) mya, and ca. 508 (442–580) mya the split between Ahnfeltiophycidae and Rhodymeniophycidae occurred.[1]


  1. ^ a b Divergence time estimates and the evolution of major lineages in the florideophyte red algae - Nature
  2. ^ Cronquist, A. (1960). "The divisions and classes of plants". The Botanical Review. 26 (4): 425–482. doi:10.1007/BF02940572.
  3. ^ Yoon, Hwan Su; Muller, Kirsten M.; Sheath, Robert G.; Ott, Franklyn D.; Bhattacharya, Debashish (April 2006). "DEFINING THE MAJOR LINEAGES OF RED ALGAE (RHODOPHYTA)1". Journal of Phycology. 42 (2): 482–492. doi:10.1111/j.1529-8817.2006.00210.x. ISSN 0022-3646.
  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 (10): 925–934. doi:10.2307/2439535. JSTOR 2439535.
  5. ^ a b c Lee, R.E. (2008). Phycology, 4th edition. Cambridge University Press. ISBN 978-0-521-63883-8.
  6. ^ 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.

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