world of amoeboid organisms

Menu
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

Polychaos spec.

Polychaos spec. Polychaos spec. Diagnosis: Large amoeba with an irregular more or less polypodial shape during slow locomotion; uroid finely papillated, usually very large fasciculate

Read More »

Spiculophrys

Genus Spiculophrys Zlatogursky, 2016 Diagnosis: Centrohelids lacking silica scales but with numerous thin, pointed organic (without any traces of silica) scales tapering towards acute apices. 18S

Read More »

Acanthocystis drakena

From Zlatogursky, 2016 Acanthocystis drakena Zlatogursky, 2016 Diagnosis: Cells are 21.1-30.5 µm (ca. 26.7) in diameter. Cell is covered with oval plate-scales having a margin

Read More »

Choanocystis symna

From Zlatogursky, 2014 Choanocystis symna Zlatogursky, 2014 Diagnosis: Cell body ca. 6.7 µm in diameter. Axopodia three–five times longer than a cell diameter. Plate-scales dumbbell-shaped

Read More »

Acanthocystis costata

From Zlatogursky, 2014 Acanthocystis costata Zlatogursky, 2014 Diagnosis: Cell body ca 9.5 µm in diameter. Axopodia 2–3 times longer than cell diameter. Length of spine-scales

Read More »

Kinetocyst

Left: ultra-structure of a kinetocyst of Raphidiophrys contractilis); right: two kinetocysts in an axopodium. Kinetocysts In centrohelid heliozoa, extrusomes are called kinetocysts, and are present

Read More »