This amoeba resembles Squamamoeba. I found only one single specimen in freshwater sediments from a ditch in Gaasterland, the Netherlands. It showed very fine subpseudopodia on a conical base and is c. 20 µm long.
Note the trailing filament at the uroid
This specimen was found in another sample (Crailoo). It is larger than the one above, c. 33 µm. It shows conical projections around the anterior part of the cell. Each projection is the base of a filipodium. Careful focussing reveals that this amoeboid is ‘walking’ on its filiopodia. The dark spots on the photomicrographs indicate the presence of filipodia.
Impression of the movement of the amoeba.
Arrows indicate some filopodia on the anterior part.
This specimen came from a sample from the Rotes Wasser, Germany.
The granule is attached to the deck glass and in focus, in contrast to the amoeba. It is clear that the amoeba doesn’t move along the glass, but keeps a little distance, which means that its thin filopodia function as legs.
Centropyxis declivistoma, after Chardez, 1990 Centropyxis declivistoma Chardez, 1990 Diagnosis: Test ovoid, slightly compressed dorso-ventrally, especially in the anterior region, embedded with polymorph mineral platelets. Pseudostome
Plagiopyxis bicamera, after Coûteaux, 1978 Plagiopyxis bicamera Coûteaux, 1978 Diagnosis: Test elongated, in ventral view elliptical, dorso-ventrally compressed, colorless or yellowish, with a cryptostome with visor.
Arcella jurassica, after Olivier, 1944 Arcella jurassica Olivier, 1944 Diagnosis: Test pyramid-shaped but strongly truncated, in lateral view trapezium-shaped, with 5-8 planes; pseudostome surrounded by