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Title: Halvaria  
Author: World Heritage Encyclopedia
Language: English
Subject: Chromalveolata, Pompholyxophrys, Holomycota, Pinaciophora, Acanthoecidae
Collection: Chromalveolata
Publisher: World Heritage Encyclopedia


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 not related, yet forming a reduced chromalveolate clade. They split apart from the Rhizaria (originally one of the six major prokaryote 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.  
  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.  
  3. ^ Burki, Fabien; Shalchian-Tabrizi, Kamran & Pawlowski, Jan (2008). "Phylogenomics reveals a new 'megagroup' including most photosynthetic eukaryotes". Biology Letters 4 (4): 366–369.  
  4. ^ Kim, E; Graham, LE (Jul 2008). "EEF2 analysis challenges the monophyly of Archaeplastida and Chromalveolata." (Free full text). PLoS ONE 3 (7): e2621.  
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