Anisonemidae is a small family of euglenid algae, with two accepted genera.

[2] The family consists of single-celled organisms with a larger posterior flagellum by means of which they are able to glide.

They are phagotrophic, meaning that they feed by engulfing particles of food, and are non-photosynthetic.

As of May 2023[update], two genera are accepted:[2] A third genus, Heteronema Dujardin, 1841, is listed by some sources.

[1] The status of the genus is unclear; it appears to be polyphyletic, with some species falling into the order Peranemida and others in Anisonemida.