Cercozoa Cavalier-Smith 1998, emend. Adl et al. 2005

Diagnosis: Diverse clade lacking distinctive morphological or behavioural characters; biciliated and/or amoeboid, usually with filopodia; most with tubular mitochondrial cristae; cysts common; kinetosomes connecting to nucleus with cytoskeleton; usually with microbodies and extrusomes.

Imbricatea Cavalier-Smith 2011
Test proteinaceous, with calcified inner layer, or completely chitinoid with recycled mineral particles; pseudopodia conical, pointed, clearly ectoplasmatic, sometimes branched and may anastomose; Cryptodifflugia stands out by having orthomitosis, but it is unclear if this feature is characteristic for the group.

Thecofilosea Cavalier-Smith 2003, emend. Cavalier-Smith 2011
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.

Granofilosea Cavalier-Smith & Bass 2009
With very fine branching or unbranched granuloreticulopodia bearing obvious extrusomes as the granules at frequent rather regular intervals, or with radiating, sometimes branched, axopodia with similar granules; pseudopodia supported by internal microtubules and typically appressed to the substratum during feeding, in a semi-immobile state; in most species, pseudopodia do not anastomose; some with biciliated swimming or gliding stage.

Incertae sedis: Chlamydophryidae de Saedeleer 1934: Capsellina, Chlamydophrys,
Clypeolina, Diaphoropodon, Lecythium, Leptochlamydophrys, Penardeugenia.

Note: this is not a complete overview of Cercozoa.

After Adl et al, Revised Classification of Protozoa, 2012

Recent posts

Argynnia

Argynnia dentistoma, 117 µm long – Tirol, Austria Genus Argynnia Vucetich, 1974 Diagnosis: Shell compressed, aperture surrounded by siliceous plates, giving it a rough outline.

Read More »

Vexilliferidae

Family Vexilliferidae Page, 1987 Diagnosis: Amoebae with long, slender subpseudopodia (usually more than one) frequently giving a spiny appearance to the cell. Subpseudopodia from hyaline

Read More »

Tracheleuglypha dentata

Tracheleuglypha dentata, Ecuador (l) and the Netherlands (r) Tracheleuglypha dentata (Vejdovsky, 1882) Diagnosis: test clear, elliptical, round in cross-section; with circular, overlapping scales; no spines

Read More »

TestBeeld

Dit is een test ,et de library sasasa asas sass asas asas asa sas asas as asas asa sas asasasas asasa sas asasas asa sasa

Read More »