Difflugia Leclerc, 1815 (ref. ID; 3693)
Rhizopoda (ref. ID; 4810)
Rhizopoda: Testacea: Order Testacealobosa De Saedeleer, 1934: Eulobosa: Family Difflugiidae Awerinzew, 1906 (ref. ID; 7500)
Difflugiidae Awerinzew (ref. ID; 7501)

[ref. ID; 890]
With shell. The strength of the shell which is dependent on the arrangement of particles and the binding matrix. Three categories are readily identified, robust, intermediate and fragile. Species with robust shells often have irregular outlines as in D. oblonga. They appear to be non-selective with regards to size or shape of particles, often assembling these materials to be more than one layer deep, and rarely are areas of organic cement seen as part of the surface pattern. Those in intermediate category are probably the largest group and include D. pyriformis, D. gigantea, D. claviformis and others that construct smooth or regular shells and have areas of organic cement showing as part of the surface pattern. Those of fragile category include D. bacillariarum, D. bacillifera, D. brevicolla and D. lacustris, have shells that are fragile or delicate. The shells are constructed mainly of diatom frustules. The choice of shell materials influenced of pH. (Heal, 1961) (ref. ID; 890)

[ref. ID; 1618]
Test variable in shape, but generally circular in cross-section; composed of cemented quartz-sand, diatoms, and other foreign bodies; aperture terminal; often with zoochlorellae; cytoplasmic body almost fills the test; typically a single nucleus; many contractile vacuoles; pseudopodia cylindrical, simple or branching; end rounded or pointed; fresh water, woodland soil, etc. (ref. ID; 1618)

[ref. ID; 1923]
Shell varying from globular to elongated pyriform or acuminate. Aperture without diaphragm. (ref. ID; 1923)

[ref. ID; 3686]
Shell colourless, yellow or brown; circular, ovoid, pyriform or acuminate; composed of agglutinated mineral particles and diatom-frustules; aperture terminal, circular or lobed, sometimes with an organic border. (ref. ID; 3686)