The Kingdom-level grouping known as Protista or Protoctistae consists mainly of microscopic organisms. It is defined by exclusion: its members are neither animals (which develop from a blastula), plants (which develop from an embryo), fungi (which lack
undulipodia and develop from spores), nor prokaryotes. It includes the green algae (Gamophyta and Chlorophyta), red algae (Rhodophyta), brown algae (Phaeophyta), diatoms (Bacillariophyta), and other groups.
Different authorities have differing views on the taxonomy of these organisms.
Describes the kingdom as "a catch-all for the multicellular organisms which don't fit into the Animal, Plant, or Fungus Kingdoms" and describes its scope. www.perspective.com/nature/protoctista-index.html
Information about algae and their taxonomy, including 'The Catalogue of the Benthic Marine Algae of the Indian Ocean,' and 'The Index Nominum Algarum,' a compendium of circa 200,000 algal names. ucjeps.herb.berkeley.edu/rlmoe
General discussion of the kingdom-level taxon Chromista, including diatoms, kelp, downy mildew, and other organisms that possess chlorophyll and are mostly photosynthetic, but are not plants. Includes links for more information. www.ucmp.berkeley.edu/chromista/chromista.html
Information on the algae of the world, including terrestrial, marine, and freshwater forms. Search by genus, species, or common name. Includes images and references. www.algaebase.org
Image database archiving more than 34,000 images (511 genera, 1944 species) and 556 movie clips for research and education. protist.i.hosei.ac.jp/Protist_menuE.html
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