Endohelea Explained

Endohelea is a proposed clade 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.^[1] 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 Family Tetraheliidae Genus Tetrahelia

According to a study by Yazaki et al. published in 2022, Microheliella is Cryptista's sister taxon.^[2]

External links

• Tree of Life: Hacrobia

Notes and References

1. Yabuki. A.. Microheliella maris (Microhelida ord. n.), an ultrastructurally highly distinctive new axopodial protist species and genus, and the unity of phylum Heliozoa.. Protist. 2012. 163. 3. 356–388. 10.1016/j.protis.2011.10.001. etal. 22153838.
2. Yazaki E, Yabuki A, Imaizumi A, Kume K, Hashimoto T, Inagaki Y. The closest lineage of Archaeplastida is revealed by phylogenomics analyses that include Microheliella maris. Open Biol. 2022-04-13. 12. 4. 210376. 10.1098/rsob.210376. 35414259. 9006020.