Anaerobic or microaerophilic, either with modified mitochondria that lack cristae, are nonrespiratory, and lack a genome (e.g. hydrogenosomes or mitosomes), or without mitochondria; mostly ciliated cells, ancestrally with four kinetosomes per kinetid, though a great variation exists; some free-living, many endobiotic, some parasitic. It is possible, this is a long branches assemblage in phylogenomic scale (Strassert et al., 2021). A previous position is a basal to Discoba (Diaphoretickes, not Amorphea) (Adl., 2018).

Adl S. M., Simpson A. G., Lane C. E. et al. The revised classification of eukaryotes. J. Eukaryot. Microbiol. 2012. V. 59. P. 429–493. https://doi.org/10.1111/j.1550-7408.2012.00644.x

Adl S. M., Bass D., Lane C. E., et al. Revisions to the classification, nomenclature, and diversity of eukaryotes. Journal of Eukaryotic Microbiology. 2018.
V. 66(1). P. 4–119. https://doi.org/10.1111/jeu.12691

Cavalier-Smith T. Amoeboflagellates and mitochondrial cristae in eukaryote evolution: Megasystematics of the new protozoan subkingdoms Eozoa and Neozoa. Arch. Protistenk. 1997. V. 147 (3-4). P. 237-258.

Cavalier-Smith T. The excavate protozoan phyla Metamonada Grassé emend. (Anaeromonadea, Parabasalia, Carpediemonas, Eopharyngia) and Loukozoa emend. (Jakobea, Malawimonas): their evolutionary affinities and new higher taxa. Int. J. Syst. Evol. Microbiol. 2003. V. 53 (6). P. 1741–58. https://doi.org/10.1099/ijs.0.02548-0

Cavalier-Smith T. Early evolution of eukaryote feeding modes, cell structural diversity, and classification of the protozoan phyla Loukozoa, Sulcozoa, and Choanozoa. European Journal of Protistology. 2013. V. 49 (2). P. 115–178. https://doi.org/10.1016/j.ejop.2012.06.001

Strassert J. F. H., Irisarri I., Williams T.A., et al. A molecular timescale for eukaryote evolution with implications for the origin of red algalderived plastids. Nature Communications. 2021;12:1–13. https://doi.org/10.1038/s41467-021-22044-z
• AMORPHEA [Adl et al., 2012]
•• LOUKOZOA [Cavalier-Smith, 2013]
••• Malawimonadea [Cavalier-Smith, 2003]
••• Metamonada [sensu Cavalier-Smith, 2003]
•••• Anaeromonada [Cavalier-Smith, 1997]
••••Trichozoa [Cavalier-Smith, 2003]
••• Ancyromonadida [Cavalier-Smith, 2013]

Rank correlation:
• ~Subdomain
•• ~ Kingdom
••• ~ Infrakingdom
••••~ Superphylum/Phylum