# Monadofilosa

Monadofilosa is a grouping of Cercozoa. (It is sometimes considered one of three, the other two being Endomyxa and Reticulofilosa.) These organisms are single-celled amoeboid protists.

## Classification

Monadofilosa includes the testaceans, which are testate filose amoeboids, and the cercomonads.
It is sometimes described as Testaceafilosia and Sarcomonadea.
It has also been described as Sarcomonadea (Cercomonas, Heteromita, Bodomorpha, Proleptomonas, Allantion), Thecofilosea (Cryptodifflugia, Cryothecomonas), Spongomonadea (Spongomonas, Rhipidodendron), and Imbricatea (Thaumatomonas, Thaumatomastix, Allas, Gyromitus, Euglypha, Trinema, Paulinella).
* The testaceans live both in marine and freshwater habitats, and in mosses. Members include Lecythium, Pseudodifflugia, Euglypha (a euglyphid), and Paulinella chromatophora.
* Cercomonads are flagellates that glide on their posterior cilium and/or generate filopodia. Members of this group contain Cryothecomonas, Thaumatomonas, which is covered with siliceous scales, and Cercomonas, which is naked. Cercomonas contains several species that show exhibit amoeboid movement, such as the testate amoeba Cyphoderia, and the flagellate Cryothecomonas.
Monadofilosa is sometimes treated as a superclass rather than a subphylum.
Sainouron has been grouped in Monadofilosa.

### Phylogeny

Phylogeny based on Bass et al. 2009, Howe et al. 2011 and Bass et al. 2016.
| Metromonadea Metopiida Metromonadida Cercomonadida Glissomonadida Pansomonadida Ventrifilosa Thecofilosea Tectosia Tectofilosida Phaeodaria Eodarida Opaloconchida Eothecia Cryomonadida Matazida Botuliformidae Ebriida Silicofilosea Placoperla Perlatia Perlofilida Spongomonadida Placofila Rotosphaerida Thaumatomonadida Placonuda Discocelida Discomonadida Euglyphida Nudisarca Variglissida Marimonadida | Sarcomonadea (paraphyletic) |

### Taxonomy

* Infraphylum Monadofilosa Cavalier-Smith 1997 stat. n. Cavalier-Smith & Oates 2012 [Eoglissa Cavalier-Smiths 2012]
** Family ?Katabiidae Cavalier-Smith 2012
** Order ?Pseudodimorphida
** Order Cercomonadida Poche 1913 emend. Karpov et al. 2006
** Class Helkesea Cavalier-Smith 2017
*** Order Ventricleftida Cavalier-Smith 2011
*** Order Helkesida Cavalier-Smith 2017 [Sainourida]
** Class Metromonadea Cavalier-Smith 2007
*** Order Metromonadida Bass & Cavalier-Smith 2004 emend. Cavalier-Smith & Oates 2012
*** Order Metopiida Cavalier-Smith 2003
** Clade Glissomonadida-Pansomonadida
*** Order Pseudosporida Hibberd 1983 sensu Cavalier-Smith 1993
*** Order Dimorphida Siemensma 1991 [Endonucleoplastiales]
*** Order Glissomonadida Howe & Cavalier-Smith 2009 emend. Hess et al. 2013
*** Order Pansomonadida Vickerman 2005
** Superclass Ventrifilosa Cavalier-Smith 2012
*** Class Thecofilosea Cavalier-Smith 2003 emend. Cavalier-Smith 2011 [Tripylea Hertwig 1879]
**** Order ?Hemimastigida Foissner, Blatterer & Foissner 1988
**** Subclass Eothecia Cavalier-Smith 2012
***** Family ?Botuliformidae
***** Order Matazida Cavalier-Smith 2012
***** Order Ebriida Poche [Ebriales Honigsberg 1964; Stereotestales]
***** Order Cryomonadida Cavalier-Smith 1993 [Cryothecomonadida]
**** Subclass Tectosia Cavalier-Smith 2012
***** Order Tectofilosida Cavalier-Smith & Chao 2003
***** Infraclass Phaeodaria Haeckel 1879 stat. n. Cavalier-Smith & Chao 2012
****** Order Eodarida Cavalier-Smith 2012
****** Order Opaloconchida Cavalier-Smith 2012
*** Class Silicofilosea Adl et al. 2005 emend. Adl et al. 2012 [Imbricatea Cavalier-Smith 2011]
**** Subclass Placoperla Cavalier-Smith 2012
***** Superorder Perlatia Cavalier-Smith 2012
****** Order Perlofilida Cavalier-Smith 2012
****** Order Spongomonadida Hibberd 1983 emend. Karpov 1990
***** Superorder Placofila Cavalier-Smith 2012
****** Order Zoelucasida Cavalier-Smith 2014
****** Order Rotosphaerida Rainer 1968
****** Order Thaumatomonadida Shirkina 1987
**** Subclass Placonuda Cavalier-Smith 2012
***** Order ?Discocelida Cavalier-Smith 1997
***** Order ?Discomonadida Cavalier-Smith 2014
***** Superorder Euglyphia Cavalier-Smith 2012
****** Order Euglyphida Copeland 1956 emend. Cavalier-Smith 1997 [Euglyphina Bovee 1985]
***** Superorder Nudisarca Cavalier-Smith 2012
****** Order Variglissida Cavalier-Smith 2014 [Clautriaviida; Nudifilida]
****** Order Marimonadida Cavalier-Smith & Bass 2011 [Auranticordida]