Small test yellowish to brownish; Difflugia-like in general appearance, compressed; with or without foreign bodies; pseudopodia long, acutely pointed; freshwater. (ref. ID; 1618)
ref. ID; 1923
Shell compressed, ovoid, or pear-shaped. (ref. ID; 1923)
ref. ID; 3686
Shell colourless, yellow or brown; ovoid; composed of an outer proteinaceous material usually lined with an inner calcareous layer; aperture terminal, circular. (ref. ID; 3686)
In side view strongly compressed. Aperture circular. Pseudopodia straight, linear, often pointed at the extremity and anastomosing near the base. Habitat aquatic vegetation. (ref. ID; 1923)
Test ovoid; without foreign bodies; crown hemispherical; aperture truncate; cytoplasm with chlorophyllous food particles; in marshy soil. (ref. ID; 1618)
The pseudopodial system of actively moving specimens of C. oviformis usually consists of several tapering cytoplasmic extensions which may have small branches, and appear to represent a typical filopodial system. At the ultrastructural level the pseudopodial system is seen to consist of the main filopods and many additional cytoplasmic strands, ranging in diameter from 45 nm to 3 µm, which are reminiscent of those seen in foraminifera. (ref. ID; 2291)
The shell is colourless, circular or ovoid, and has a smooth surface. The shell wall is composed of two layers, a thin outer covering of organic material and a thick inner layer of amorphous calcium phosphate. The aperture is terminal, round and bordered by a small organic collar. Abnormal forms occur in clonal cultures. These are usually two to three times the size of a normal animal, have two or more apertures and often have an uneven surface (Hedley et al. 1977). (ref. ID; ?)
Shell ovoid, colorless, with a smooth surface and a rigid shell wall. Aperture circular, central, slightly thickened. Shell circular in transverse section. (ref. ID; 4755)
Comments
There is some confusion about the genera Difflugiella and Cryptodifflugia (Deflandre 1953; Thomas 1959; Grospietsch 1964; Schonborn 1964, 1965; Page 1966; Hedley et al. 1977). We follow the clear argumentation of Page (1966), who includes in Cryptodifflugia those species with a rigid shell wall. (ref. ID; 4755)
The shell resembling Difflugia, but with remarkable neck. The protoplasm green in color, with a large number of granules. One nucleus, one contractile vacuole. (ref. ID; 3536)