Quadrulella tropica Wailes, 1912
This specimen resembles much the description and drawing of Q. tropica Wailes, 1912. I found it once in a sample from the Bert Bospad near Hilversum in the Netherlands, in a Sphagnum pool.
Difflugia ampla, after Rampi, 1950 (l) and Gauthier-Lièvre et Thomas, 1958 (r) Difflugia ampla Rampi, 1950 Diagnosis: Test broadly pyriform, with a wide and rounded
Difflugia parva, from Gauthier-Lièvre et Thomas, 1958 Difflugia parva (Thomas, 1954) Ogden, 1983 = Difflugia oblonga var. parva Thomas, 1954 Diagnosis: Test pyriform, tapering evenly from