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Cercomonas sp.jpg
Scientific classification
Domain: Eukaryota
(unranked): SAR
(unranked): Rhizaria
Phylum: Cercozoa
Subphylum: Filosa
Superclass: Monadofilosa
Cavalier-Smith, 1997

Monadofilosa is a grouping of Cercozoa.[1] (It is sometimes considered one of three, the other two being Phytomyxa and Reticulofilosa.)[citation needed] These organisms are single-celled amoeboid protists.


Monadofilosa includes the testaceans, which are testate filose amoeboids, and the cercomonads.

It is sometimes described as Testaceafilosia and Sarcomonadea.[2]

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).[3]

Monadofilosa is sometimes treated as a superclass rather than a subphylum.

Sainouron has been grouped in Monadofilosa.[4]


  1. ^ Cavalier-Smith T, Chao EE (October 2003). "Phylogeny and classification of phylum Cercozoa (Protozoa)". Protist. 154 (3-4): 341–58. doi:10.1078/143446103322454112. PMID 14658494. 
  2. ^ Wylezich C, Meisterfeld R, Meisterfeld S, Schlegel M (2002). "Phylogenetic analyses of small subunit ribosomal RNA coding regions reveal a monophyletic lineage of euglyphid testate amoebae (Order Euglyphida)". J. Eukaryot. Microbiol. 49 (2): 108–18. doi:10.1111/j.1550-7408.2002.tb00352.x. PMID 12043958. 
  3. ^ "". Retrieved 2009-06-26. 
  4. ^ Cavalier-Smith T, Lewis R, Chao EE, Oates B, Bass D (October 2008). "Morphology and phylogeny of Sainouron acronematica sp. n. and the ultrastructural unity of Cercozoa". Protist. 159 (4): 591–620. doi:10.1016/j.protis.2008.04.002. PMID 18583188. 

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