Endohelea

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Endohelea
Scientific classification OOjs UI icon edit-ltr.svg
(obsolete)
Domain: Eukaryota
Clade: Pancryptista
Phylum: Cryptista
Subphylum: Endohelia
Cavalier-Smith, 2021 [1]
Class: Endohelea
Cavalier-Smith, 2012
Orders [1]

Endohelea is a proposed class of eukaryotes that are related to Archaeplastida and the SAR supergroup. [2] They used to be considered heliozoans, but phylogenetically they belong to a group of microorganisms known as Cryptista. [1]

Contents

Classification

Based on studies done by Cavalier-Smith, Chao & Lewis in 2015, the class contained two orders: Microhelida and Heliomonadida. [3] [4] 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. [1]

According to a study by Yazaki et al. published in 2022, Microheliella is Cryptista's sister taxon. [5]

References

  1. 1 2 3 4 5 Cavalier-Smith T (2022). "Ciliary transition zone evolution and the root of the eukaryote tree: implications for opisthokont origin and classification of kingdoms Protozoa, Plantae, and Fungi". Protoplasma. 259: 487–593. doi:10.1007/s00709-021-01665-7. PMC   9010356 . PMID   34940909.
  2. ↑ Burki F, Inagaki Y, Bråte J, Archibald JM, Keeling PJ, Cavalier-Smith T, et al. (July 2009). "Large-scale phylogenomic analyses reveal that two enigmatic protist lineages, telonemia and centroheliozoa, are related to photosynthetic chromalveolates". Genome Biol Evol. 1: 231–8. doi:10.1093/gbe/evp022. PMC   2817417 . PMID   20333193.
  3. ↑ Cavalier-Smith; Chao; Lewis (2015), "Multiple origins of Heliozoa from flagellate ancestors: New cryptist subphylum Corbihelia, superclass Corbistoma, and monophyly of Haptista, Cryptista, Hacrobia and Chromista", Molecular Phylogenetics and Evolution, 93: 331–362, doi: 10.1016/j.ympev.2015.07.004 , PMID   26234272
  4. ↑ Yabuki, A.; et al. (2012). "Microheliella maris (Microhelida ord. n.), an ultrastructurally highly distinctive new axopodial protist species and genus, and the unity of phylum Heliozoa". Protist. 163 (3): 356–388. doi:10.1016/j.protis.2011.10.001. PMID   22153838.
  5. ↑ Yazaki E, Yabuki A, Imaizumi A, Kume K, Hashimoto T, Inagaki Y (2022-04-13). "The closest lineage of Archaeplastida is revealed by phylogenomics analyses that include Microheliella maris". Open Biol. 12 (4): 210376. doi:10.1098/rsob.210376. PMC   9006020 . PMID   35414259.


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