Centropyxis sylvatica (Deflandre, 1929 var.) Bonnet and Thomas, 1955
Diagnosis: Test in ventral view broadly oval to circular, in lateral view more or less hemispherical, with a well curved posterior region. Pseudostome elliptical or oval, the ventral wall, which limits the base of the pseudostome, curves inwards until it touches the inner side walls where it is welded to, leaving an aperture that is oval to circular. Test wall composed of an organic matrix, incorporating fine plate-like polymorphous mineral particles.
Dimensions: Deflandre (1929): length 68-102 µm, width 63-85 µm, height 17-30 µm; Bonnet and Thomas (1955): L 69-72 µm, W 67-73 µm, H 45-50 µm, internal aperture 5-8 µm; Lueftenegger et al. (1988): L 69-101 µm, W 67-95 µm, H 52-65 µm, internal aperture 17-23 µm.
Ecology: soil, dry mosses and Sphagnum.