Pseudodifflugia virescens
Pseudodifflugia virescens, after Penard, 1904

Pseudodifflugia virescens Penard, 1904

Diagnosis: shell chitinoid, yellow to brownish, pyriform, broad elliptical, not compressed, covered with minute particles; shell wall relatively thick; aperture circular; plasma body clear visible despite the thick covering of the shell; plasma body not completely filling the shell; nucleus large, with a small central nucleolus; filopodia numerous, long and straight, branching, but not anastomosing.

Dimensions: Penard c. 36 µm long and 26 µm broad. My measurements: 38-43 µm long.

Ecology: Sphagnum, waterplants and sediments. Fresh water.

Remarks: Penard (1904) mentions the presence of zoochlorellae in all observed cells (“plasma toujours rempli de globules chlorophylliens”) I have never seen zoochlorellae in any Pseudodifflugia species.

Pseudodifflugia virescens
Pseudodifflugia virescens
Pseudodifflugia virescens
Pseudodifflugia virescens
Pseudodifflugia virescens
Recent posts

Difflugia ampla

Difflugia ampla, after Rampi, 1950 (l) and Gauthier-Lièvre et Thomas, 1958 (r) Difflugia ampla Rampi, 1950 Diagnosis: Test broadly pyriform, with a wide and rounded

Read More »

Difflugia parva

Difflugia parva, from Gauthier-Lièvre et Thomas, 1958 Difflugia parva  (Thomas, 1954) Ogden, 1983 = Difflugia oblonga var. parva Thomas, 1954 Diagnosis: Test pyriform, tapering evenly from

Read More »