red algae

The red algae (or Rhodophyta, pronounced /roʊˈdɒfɨtə/, /ˌroʊdəˈfaɪtə/, from Greek: ῥόδον (rhodon) = rose + φυτόν (phyton) = plant, thus red plant) are one of the oldest groups of eukaryotic algae,[2] and also one of the largest, with about 5,000–6,000 species of mostly multicellular, marine algae, including many notable seaweeds. Other references indicate as many as 10,000 species;[4] more detailed counts indicate ~4000 in ~600 genera (3738 marine spp in 546 genera and 10 orders (plus the unclassifiable); 164 freshwater spp in 30 genera in 8 orders).The...

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