Genus Chlamydophrys Cienkowski, 1876
Diagnosis: test in most species thin, hyaline and colorless, sometimes difficult to observe; test ovoid, longish or broad pyriform. Test rigid, sometimes flexible, in cross-section circular or broad elliptical. Plasma nearly fills the test; usually a distinct zonal differentiation of cytoplasm, from the pseudostome to the posterior end: a number of small vacuoles, a transversal layer of food particles, a transversal layer of brilliant granules and a large vesicular nucleus. Pseudostome often on drawn-out neck, not deformable. Nucleus with a central granular nucleolus or completely granular; division with closed orthomitosis. Filopodia may anastomose, sometimes forming a large network. With some species cysts observed in collapsed tests.
Remarks: all species are small, ca. 55 µm in long. Chlamydophrys-species are hard to distinguish or closely related to Lecythium-species. Based on ample observations I think that Chlamydophrys stercorea might be identical with Lecythium hyalinum.
Chlamydophrys stercorea Cienkowski, 1876
Diagnosis: mature cysts yellowish brown, 12-15 µm in diameter; multiplication by budding; coprozoic and fresh water.
Dimensions: Test length 18-20 by 12-15 µm.
Chlamydophrys spec. from Schiermonnikoog
Diagnosis: Test hyaline, colorless, smooth, ovoid; a globule is present glose to the aperture; aperture triangular-shaped.
Dimensions: Test length 55-60 µm.
Chlamydophrys minor Belar
Diagnosis: shell rigid, ovoid, with a small aperture. Protoplasm filling the shell, with a very distinct spheric nucleus placed posteriorly, and a transversal layer of brilliant granules. Pseudopodia straight, numerous, radiating. Habitat aquatic vegetation.
Dimensions: Test length 16-20 µm.