Opalomonadea

Opalomonadea
Scientific classification
Domain:	Eukaryota
Clade:	Sar
Clade:	Stramenopiles
Phylum:	Bigyra
Subphylum:	Opalozoa
Infraphylum:	Placidozoa
Class:	Opalomonadea ; Cavalier-Smith 2013
Species
	None yet described

Last updated August 25, 2025

Opalomonadea is a class of biciliate phagotrophic opalozoans with an anterior hairy cilium, often from anaerobic habitats.^[1] It is a monophyletic group previously known as clade MAST-12, sister to Opalinata.^[1] This group was discovered through marine environmental DNA samples; no species have yet been described or cultured.^[2]

Phylogeny

The cladogram below shows the relationships between Opalomonadea and the rest of Opalozoans.^[1]

Opalozoa

Placidozoa

Opalinata

	Opalinea

	Blastocystea

Opalomonadea

Nanomonadea

Placididea

Bikosea

Pseudodendromonadida

	Bicoecida

	Anoecida

Borokida

Rictida

"Wobblata"

References

1 2 3 4 Cavalier-Smith, Thomas; Scoble, Josephine Margaret (2012). "Phylogeny of Heterokonta: Incisomonas marina, a uniciliate gliding opalozoan related to Solenicola (Nanomonadea), and evidence that Actinophryida evolved from raphidophytes" . European Journal of Protistology. 49 (3): 328–353. doi:10.1016/j.ejop.2012.09.002. PMID 23219323.
↑ Kolodziej, Karolina; Stoeck, Thorsten (2007). "Cellular Identification of a Novel Uncultured Marine Stramenopile (MAST-12 Clade) Small-Subunit rRNA Gene Sequence from a Norwegian Estuary by Use of Fluorescence In Situ Hybridization-Scanning Electron Microscopy". Applied and Environmental Microbiology. 73 (8): 2718–2726. Bibcode:2007ApEnM..73.2718K. doi:10.1128/AEM.02158-06. PMC 1855578 . PMID 17293516.

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[Incisomonas-1] 1 2 3 4 Cavalier-Smith, Thomas; Scoble, Josephine Margaret (2012). "Phylogeny of Heterokonta: Incisomonas marina, a uniciliate gliding opalozoan related to Solenicola (Nanomonadea), and evidence that Actinophryida evolved from raphidophytes" . European Journal of Protistology. 49 (3): 328–353. doi:10.1016/j.ejop.2012.09.002. PMID 23219323.

[2] Kolodziej, Karolina; Stoeck, Thorsten (2007). "Cellular Identification of a Novel Uncultured Marine Stramenopile (MAST-12 Clade) Small-Subunit rRNA Gene Sequence from a Norwegian Estuary by Use of Fluorescence In Situ Hybridization-Scanning Electron Microscopy". Applied and Environmental Microbiology. 73 (8): 2718–2726. Bibcode:2007ApEnM..73.2718K. doi:10.1128/AEM.02158-06. PMC 1855578 . PMID 17293516.

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