Arcella rota Daday, 1905
Diagnosis: Test in dorsal view circular with numerous, 38-40, small spines, giving the impression of a gear. These spines are curved, pointing downwards. Test in side view flat, height about ¼ of the diameter.
Ecology: Freshwater, Paraguay.
Pelomyxa palustris Pelomyxa palustris, found below decaying leaves in the hollow of a beech Pelomyxa palustris, found below decaying leaves in the hollow of a
H. galeata – from Stepanek, 1963 Hoogenraadia galeata (Stepanek, 1963) n. comb. Gillardella galeata Stepanek, 1963 Diagnosis: Shell somewhat similar to the shell of Corythion dubium
Arcella grospietschi, after Stepanek, 1963 Arcella grospietschi Stepanek, 1963 Diagnosis: Shell disc-shaped, yellow-brown, in ventral view with a undulated border, with seven large and seven smaller
Arcella oyei, after Stepanek, 1963 Arcella oyei Stepanek, 1963 Diagnosis: In dorsal view, the shell is circular, with 10 apparent broken lobes on the surface. In
C. halophila, after Bonnet, 1959 Centropyxis halophila Bonnet, 1959 Diagnosis: Shell with ovoid sole, extended by a rather strongly covering visor and not clearly separated
Euglypha cuspidata Euglypha cuspidata Bonnet, 1959 Diagnosis: Shell small, very transparent, ovoid, in lateral view very elliptical, with sharp edges. Pseudostome small, elliptical, surrounded by a