Ancyromonadida or Planomonadida is a small group of biflagellated protists found in the soil and in aquatic habitats, where they feed on bacteria.

[1][2] They are freshwater or marine organisms, benthic, dorsoventrally compressed and with two unequal flagellae, each emerging from a separate pocket.

The cell membrane is supported by a thin single-layered theca and the mitochondrial crests are discoidal/flat.

[5] However, they appear more basal than Malawimonas, placing them in Loukozoa, possibly as stem podiates, and depending on the placement of the root position of the Eukaryotes.

Cavalier-Smith 1998 Breviatea Cavalier-Smith 2004 Apusomonadida Karpov & Mylnikov 1989 Opisthokonta Fabomonas tropica P. brevis P. bulbosa P. elongata P. micra A. atlantica A. indica A. kenti A. sigmoides N. longa N. howeae N. limna