Notopharyngea

Notopharyngea
Scientific classification
Domain: Eukaryota
Clade: Metamonada
Phylum: incertae sedis
Class: Notopharyngea
Shiratori et al., 2026
Orders
Synonyms
  • BaSk Williams et al., 2024

The class Notopharyngea, formerly known as the BaSk clade, includes two orders of free-living anaerobic metamonads. It was identified by phylogenomic analyses as a deeply branching sister group to the Fornicata, and recently the rest of Metamonada. The extreme mitochondrial reduction observed within this free-living anaerobic protistan clade demonstrates that mitochondrial functions may be completely lost even in free-living organisms, not only parasites.[1][2]

References

  1. ^ Williams, Shelby K.; Jerlström Hultqvist, Jon; Eglit, Yana; Salas-Leiva, Dayana E.; Curtis, Bruce; Orr, Russell J. S.; Stairs, Courtney W.; Atalay, Tuğba N.; MacMillan, Naomi; Simpson, Alastair G. B.; Roger, Andrew J. (2024-08-09). "Extreme mitochondrial reduction in a novel group of free-living metamonads". Nature Communications. 15 (1): 6805. doi:10.1038/s41467-024-50991-w. ISSN 2041-1723. PMC 11316075. PMID 39122691.
  2. ^ Shiratori, Takashi; Eglit, Yana; Yazaki, Euki; Inagaki, Yuji; Simpson, Alastair G. B. (2026-04-03). "Morphology, Ultrastructure, and Classification of Barthelonids (Metamonada Incertae Sedis): With Descriptions of Microbarthelona Gen. Nov., and Parabarthelona Gen. Nov". Journal of Eukaryotic Microbiology. 73 (3). doi:10.1111/jeu.70080. ISSN 1066-5234. PMC 13087550. PMID 41992732.
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