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Chromista collage 2.jpg
Clockwise from top-left: a haptophyte, some diatoms, a water mold, a cryptomonad, and Macrocystis, a phaeophyte. The diatoms, water mold, and Macrocystis are halvarians.
Scientific classification
Domain: Eukarya
(unranked) Bikonta
(unranked) Corticata
(unranked): Halvaria*
Cavalier-Smith, 2010

Halvaria is a grouping that includes Alveolata and Heterokonta (Stramenopiles).[1]

Analyses in 2007 and 2008 agree that the Stramenopiles and the Alveolata are related, forming a reduced chromalveolate clade. They group together with the Rhizaria (originally one of the six major eukaryote groups) to form a clade dubbed the SAR supergroup.[2][3][4]


  1. ^ Cavalier-Smith T (June 2010). "Kingdoms Protozoa and Chromista and the eozoan root of the eukaryotic tree". Biol. Lett. 6 (3): 342–5. doi:10.1098/rsbl.2009.0948. PMC 2880060. PMID 20031978. 
  2. ^ Fabien Burki; Kamran Shalchian-Tabrizi; Marianne Minge; Åsmund Skjæveland; Sergey I. Nikolaev; Kjetill S. Jakobsen; Jan Pawlowski (2007). "Phylogenomics Reshuffles the Eukaryotic Supergroups". PLoS ONE 2 (8): e790. doi:10.1371/journal.pone.0000790. PMC 1949142. PMID 17726520.  open access publication - free to read
  3. ^ Burki, Fabien; Shalchian-Tabrizi, Kamran & Pawlowski, Jan (2008). "Phylogenomics reveals a new 'megagroup' including most photosynthetic eukaryotes". Biology Letters 4 (4): 366–369. doi:10.1098/rsbl.2008.0224. PMC 2610160. PMID 18522922. 
  4. ^ Kim, E; Graham, LE (Jul 2008). "EEF2 analysis challenges the monophyly of Archaeplastida and Chromalveolata." (Free full text). PLoS ONE 3 (7): e2621. doi:10.1371/journal.pone.0002621. PMC 2440802. PMID 18612431.  open access publication - free to read