Thecofilosea Cavalier-Smith, 2003, emend. Cavalier-Smith, 2011
Diagnosis: With robust organic extracellular theca, unlike most other Cercozoa, which are usually naked or with scales; ventral filose pseudopodia emerge from ventral groove; two cilia with divergent kinetosomes, secondarily lost in Rhizaspidae and the euglyphid amoebae, and restricted to zoospores in phaeodarians; ancestrally benthic gliding on posterior cilium only, but some secondarily planktonic swimmers amongst which ebriids have lost pseudopodia; theca with perforations for cilia and for pseudopodia, and three perforations in phaeodaria (thus also called Tripylea HERTWIG 1879), which have surrounded it by a pseudopodial net containing a pigmented phaeodium, thus converting it into a "central capsule", but not homologous with that of Polycystinea of Radiolaria; silica scales absent, unlike many Imbricatea, but hollow silica endoskeleton in all ebriids and most phaeodarians.
Incertae sedis: Chlamydophryidae DE SAEDELEER 1934: Capsellina, Chlamydophrys,
Clypeolina, Diaphoropodon, Lecythium, Leptochlamydophrys, Penardeugenia.