Chromalveolate

formerly classified as an eukaryote supergroup now as a megagroup including most photosynthetic eukaryotes

Chromalveolata is a eukaryote supergroup first proposed by Thomas Cavalier-Smith as a refinement of his kingdom Chromista, which was first proposed in 1981.

Chromalveolates
Clockwise from top-left: a haptophyte, some diatoms, an oomycete, a cryptomonad, and Macrocystis, a phaeophyte
Scientific classification
Domain:
(unranked):
Kingdom:
Cavalier-Smith 1998
Phyla

The origin of the Chromalveolata was thought to be a secondary endosymbiosis between a bikont (cell with two flagella) and a red alga.[1] This union led to plastids containing chlorophyll c. In Cavalier-Smith's classification, the Chromalveolata was one of the six major groups within the eukaryotes.[2]

The classification has been challenged.[3][4]

References