Retaria is a clade within the supergroup Rhizaria containing the Foraminifera and the Radiolaria. In 2019, the Retaria were recognized as a basal Rhizaria group, as sister of the Cercozoa.
Taxonomy In 2018, Cavalier-Smith called this group Ectoreta and grouped it with Endomyxa and called this new grouping Retaria instead. Cavalier-Smith et al., 2018 proposed to exclude Sticholonchea from Radiozoa and proposed this scheme instead:
Phylum Retaria Subphylum Endomyxa Superclass Marimyxia Superclass Proteomyxia Subphylum Ectoreta Infraphylum Foraminifera Infraphylum Radiozoa Infraphylum Sticholonchia
Exclusion of Endomyxa from Cercozoa was challenged in 2019. Retaria is generally divided into two phyla Foraminifera and Radiolaria.
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