Anaeromonadea

Anaeromonadea, also known as Preaxostyla, is a class of excavate protists, comprising the oxymonads, Trimastix, and Paratrimastix. This group is studied as a model system for reductive evolution of mitochondria, because it includes both organisms with anaerobic mitochondrion-like organelles (Trimastix and Paratrimastix ), and those that have completely lost their mitochondria (oxymonads Monocercomonoides, Streblomastix, and Blattamonas ).

Phylogeny and Taxonomy
Based on the work of Zhang et al. 2015.