Endohelea
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Endohelea is a class of eukaryotes that are related to Archaeplastida and the SAR supergroup. They used to be considered heliozoans, but phylogenetically they belong to a group of microorganisms known as Cryptista.
Classification
Based on studies done by Cavalier-Smith, Chao & Lewis in 2015, the class contained two orders: Microhelida and Heliomonadida. However, according to a study by Cavalier-Smith, published in 2022, the order Heliomonadida is actually part of Cercozoa, and only one species of heliomonad, Tetrahelia pterbica, has been kept in Endohelea as its own order Axomonadida.
- Class Endohelea Cavalier-Smith 2012 Order Microhelida Cavalier-Smith 2011 Family Microheliellidae Cavalier-Smith 2011 Genus Microheliella Cavalier-Smith & Chao 2012 Order Axomonadida Cavalier-Smith 2012 emend. 2022 Family Tetraheliidae Cavalier-Smith 2022 Genus Tetrahelia Cavalier-Smith 2022
According to a study by Yazaki et al. published in 2022, Microheliella is Cryptista's sister taxon.