Cryptodifflugia oviformis, Penard, 1890, 1977

Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, Zootaxa 4282 (2), pp. 292-308 : 301

C. oviformis Penard, 1890

Figs 5 g, 5h, 5i, 5j, 5k

Difflugiella oviformis in Bonnet et Thomas, 1955 ; Cryptodifflugia operculata Page, 1966

Original description. Penard 1890, P. 168, Table 7, Figs 95–107.

Description. Shell colorless, oval, with 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, circular and bordered by a small organic collar.

Measurements. Shell length 13–26 µm, shell width 8.0–20.7 µm, diameter of aperture 3.0–6.9 µm.

Habitat. Freshwater sediments, Sphagnum mosses, wet green mosses, aquatic plants, acid soil.

Geographical distribution. Cosmopolitan.

Figures

FIGURE 5. Different species of the genus Cryptodifflugia: a – d— C. lanceolata, broad side lateral view (a), narrow side lateral view (b), apertural view (c), d— C. leachi, lateral view of living cell, e – f— C. minuta, lateral view, g – k C. oviformis, lateral view of encysted specimen (g), lateral view (i), apertural view (h, j), lateral view of encysted specimen (k). a – c—after Golemansky 1970, d—after Nicholls 2006, e – f—after Palyfair 1917, g – h—after Page 1966, i – k—after Penard 1890. Scale bar 20 µm.