Members of the kingdom Rhodophyta are the red algae or seaweeds. Almost all are marine and they vary greatly, some being filaments, some cushions, some feathery and others flattened discs. Many have a coating of calcium carbonate and form crusts or calcified trees that resemble corals. They contain phycobilins and chlorophyll a, but not chlorophyll b or c, and there are about 4,000 species known.
The Intertidal Rocky Shore: Coralline Algae and Green Seaweed
Photographs of about 6 species of encrusting varieties of algae and about 10 of green seaweeds that grow around the coasts of New Zealand.
The Intertidal Rocky Shore: Red Seaweeds
Photographs of about 30 species of red algae that grow around the coasts of New Zealand.
Information from Wikipedia on these seaweeds, their place in the fossil record, taxonomy and classification.
Article by Jean-Marie Cavanihac on the red seaweeds and their complex reproductive cycles, with many fine images of the processes involved.
Last update:February 23, 2016 at 6:24:03 UTC