Halvaria
| Halvaria | |
|---|---|
| Important halvarian groups. Clockwise from top-left: a opalinid (Bigyra ).
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Scientific classification 
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| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Subkingdom: | SAR |
| Infrakingdom: | Halvaria Cavalier-Smith 2010 |
| Superphyla and phyla[1] | |
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Halvaria is a taxonomic grouping of
Alveolata and Stramenopiles (Heterokonta).[2]
Analyses in 2007 and 2008 revealed that the Stramenopiles and the Alveolata are related, and form a reduced
chromalveolates. The two clades together with the Rhizaria (originally one of the six major eukaryote groups) form a clade dubbed the SAR supergroup.[3][4][5]
A phylogenomic analysis from 2016 cast doubt on Halvaria, suggesting that Alveolata is the sister group to Rhizaria (making the R + A clade) through new rhizarian sequence data, and that support for Halvaria might be an artifact of low taxon sampling as well as long branch attraction.[6]
However, later analyses from 2021 support Halvaria as a solid clade.[7]
SAR Supergroup
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