world of amoeboid organisms

Difflugia australis
D. australis after Playfair, 1917

Difflugia australis (Playfair, 1917) Gauthier-Lièvre et Thomas, 1958
Syn.: Difflugia bacillariarum var. australis Playfair 1917

Diagnosis: Test broadly ovate, with rounded dome and convex sides converging right down to within a very short distance of the aperture at which point they diverge suddenly into a slight rim. Test very often more or less asymmetrical, one side being more inflated than the other, and the tail slanting. Fundus with a tail-like appendage. Collar of very small plates of equal size.

Dimensions: Playfair: Length 100-120 µm; width 57-72 µm; pseudostome 23-36 µm; collar 6 µm.
Vucetich: Length 100-120 µm; width 58-75 µm; pseudostome 25-35 µm; collar 6-8 µm.
Chardez (1978): Length 110-166 µm; width 60-79 µm; pseudostome 25-35 µm; collar 0-6 µm.

Ecology: Freshwater. Sphagnum. Australia, Argentina, Belgium.

Difflugia australis
D. australis after Chardez, 1978
Recent posts


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 »


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 »

Yogsothoth carteri

Yogsothoth carteri, after Shishkin and Zlatogursky, 2018 Yogsothoth carteri Shishkin and Zlatogursky, 2018 Diagnosis: Individual cells in a colony have a diameter of 9.7-15.2 µm;

Read More »