Chlamydomonas, Chlorella are present in Kingdom Protista as well as Plantae under division algae.

In which kingdom they correctly belong to?


1 Answer 1


It is generally accepted now that Chlorophyta are Plantae (see here). They are more closely related to plants than any other group of organism. Protist is a kind of basket term for any eukaryotic unicellular organism that is not an animal, fungi or a plant which is a rather exclusionary definition.

Personally, I think the kingdoms are pretty 'macro' oriented and do not really capture the diversity well of unicellular organisms. If you want to see a bunch of elderly scientist shout at each other over what appear to be arbitrary distinctions, I highly recommend attending the taxonomy session of any unicellular conference

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    $\begingroup$ What about Rhodophyta and Phaeophyta?? BTW Thnx;) $\endgroup$
    – San
    Commented Mar 24, 2017 at 11:22
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    $\begingroup$ The rhodophyta might be monophyletic with the green lineage (have a common ancestor) but the Phaeophyta are definitely distinct and they likely arose during a seperate endosymbiosis event. They just do not fit in the five kingdoms. algaebase.org is quite respected for questions of algae taxonomy $\endgroup$
    – mimat
    Commented Mar 24, 2017 at 11:51

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