SAR supergroup
SAR or Harosa is a clade that includes stramenopiles, alveolates, and Rhizaria. The first letter of each group provides the "SAR" in the name.
The term "Harosa" has also been used for this grouping by Cavalier-Smith. Adl et al. formalized the SAR supergroup as the node-based taxon Sar. They defined it as:
Note that as a formal taxon, "Sar" has only its first letter capitalized, while the earlier abbreviation, SAR, retains all uppercase letters. Both names refer to the same group of organisms, unless further taxonomic revisions deem otherwise. Members of the SAR supergroup were once included under the separate supergroups Chromalveolata and Rhizaria, until phylogenetic studies confirmed that stramenopiles and alveolates diverged with Rhizaria. This apparently excluded haptophytes and cryptomonads, leading Okamoto et al. to propose the clade Hacrobia to accommodate them.Phylogeny
Based on a compilation of the following works.
