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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Cryptodifflugia

Cryptodifflugia Penard, 1890 (ref. ID; 3519, 3686, 3693) or (Penard) Decloitre (ref. ID; ?)

Cryptodifflugiidae Rhumbler (ref. ID; 7501)

ref. ID; 1618

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)
  1. Cryptodifflugia angustastoma Beyens & Chardez, 1982 (ref. ID; 129 original paper)
  2. Cryptodifflugia brevicolla Golemansky, 1979 (ref. ID; 2116 original paper, 3519)
  3. Cryptodifflugia compressa Penard, 1902 (ref. ID; 1923, 2441, 2456, 3693 original paper)
  4. Cryptodifflugia compressa f. angustioris Tarnogradskij, 1959 (ref. ID; 2054)
  5. Cryptodifflugia crenulata Playfair, 1917
    See; Difflugiella crenulata (ref. ID; 2060)
  6. Cryptodifflugia crenulata var. globosa Playfair, 1917
    See; Difflugiella crenulata var. globosa (ref. ID; 2060)
  7. Cryptodifflugia lanceolata Golemansky, 1969 (ref. ID; 2038) or 1970 (ref. ID; 2097, 2115, 2116, 2144, 2216, 3519) reported year? (ref. ID; 2425)
  8. Cryptodifflugia operculata Page, 1966 (ref. ID; 2197)
  9. Cryptodifflugia oviformis Penard, 1890 (ref. ID; 3686, 4755) reported year? (ref. ID; 1618, 3501, 3598, 3693, 7857) or (Penard) Bonnet & Thomas (ref. ID; 2100) reported author and year? (ref. ID; 2291)
    See; Difflugiella oviformis (ref. ID; 2060)
  10. Cryptodifflugia paludosa Golemansky, 1981 (ref. ID; 3519)
  11. Cryptodifflugia penardi (Penard) Grospietsch (ref. ID; 7501) reported author and year? (ref. ID; 2087)
  12. Cryptodifflugia pusilla Playfair, 1917
    See; Difflugiella pusilla (ref. ID; 2108)
  13. Cryptodifflugia sacculus Penard, 1902 (ref. ID; 3693 original paper) reported year? (ref. ID; 3501, 3536)

    Quote from ref. ID; 3536

  14. Cryptodifflugia voigti Schmidt, 1926
    See; Difflugiella voigti (ref. ID; 2060)
  15. Cryptodifflugia vulgaris (France, 1921) Volx, 1929
    See; Difflugiella vulgaris (ref. ID; 2054)

Cryptodifflugia compressa Penard, 1902 (ref. ID; 1923, 2441, 2456, 3693 original paper)

Descriptions

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)

Measurements

Length 16-18 µm. (ref. ID; 1923)

Cryptodifflugia oviformis Penard, 1890 (ref. ID; 3686, 4755) reported year? (ref. ID; 1618, 3501, 3598, 3693, 7857) or (Penard) Bonnet & Thomas (ref. ID; 2100) reported author and year? (ref. ID; 2291)

See

Difflugiella oviformis (ref. ID; 2060)

Descriptions

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)

Measurements

16-20 by 12-15 µm. (ref. ID; 1618)

Cryptodifflugia sacculus Penard, 1902 (ref. ID; 3693 original paper) reported year? (ref. ID; 3501, 3536)

Descriptions

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)

Measurements

Size 20x16 µm, neck 10 µm. (ref. ID; 3536)