Pterocystis formosa - Ferry Siemensma
P. formosa,a spine-scale, b plate-scale – after Siemensma, 1991

Pseudoraphidiophrys formosa (Dürrschmidt, 1985)

Diagnosis: Periplast 10-15 µm, protoplast unknown; spine-scales dish-shaped, circular or oval, 3.1-3.5 µm in diameter; shaft rudimentary; from the shaft about 30 fine radiating ribs emit; plate-scales 0.9-1.0 X 1.2-1.5 µm, elliptical or somewhat a-symmetrical; in the centre with a depression with a faint indication of a central rib.

Ecology: Different water types; Chile (Dürrschmidt, 1985), Australia (Croome, 1987), Germany (Eckhard Voelcker, pers. comm., 2013).

Pseudoraphidiophrys formosa, Rotes Wasser, Germany – photomicrograph Eckhard Voelcker
Recent posts

Microcorycia spec. 4

Microcorycia spec. , folded Microcorycia spec.? I found this specimen in a sample from moss on a fallen tree in a marsh in the Naardermeer,

Read More »

Microchlamys spec.

Microchlamys spec., the same cell in lateral view Microchlamys spec. Diagnosis: Shell relatively high compared with all described species. The diameter is twice the height.

Read More »


Infraorder Excentrostoma Kosakyan et al., 2016   Diagnosis: Testate amoebae with an eccentrically placed aperture; test organic with few or many xenosomes. Family Centropyxidae Jung, 1942  

Read More »


Infraorder Longithecina Kosakyan et al., 2016   Diagnosis: Testate amoebae with a more or less tubular or cylindrical test and a terminal aperture; test with

Read More »