Diagnosis: test in lateral view broad elliptical or ovoid; in dorsal view circular; membane hyaline, yellowish to brown, covered with minute xenosomes; vesicular nucleus in the dorsal region; filopodia straight, branching and anastomosing, usually numerous; pseudostome flexible; membrane around the aperture pliable and flexible.
Dimensions: my measurements 20-40 µm; nucleus c. 12 µm (hard to detect).
Ecology: I found this species in sediments of the Spiegelplas and an oligotrophic fen near Kootwijk in the Netherlands. It looks like a Lecythium species, but it could also be a Pseudodifflugia. It also resembles Pleurophrys amphitremoides Archer, 1870, which is about 60 µm. It could alsobelong to the genus Schwabia Jung (1942).