Trinema nassa Decloitre, 1965
Diagnosis: Test just as other Trinema species with similar arrangement of the plates, but the inner border of the pseudostome is ornamented with small plates each with a short spine that points to the centre of the aperture. Spines about 1.5 µm long. Test compressed.
Dimensions: length 50-55 µm; width 25-30 µm; aperture 10-12 µm.
Ecology: Freshwater, Congo, Mbila, Africa
Difflugia levanderi , after Playfair, 1918 Difflugia levanderi Playfair, 1918 Diagnosis: Test lance-oblong or mitriform (shaped like a bishop’s miter), short and broad, fundus shaped
D. angelica after Gauthier-Lièvre et Thomas, 1960 Difflugia angelica Gauthier-Lièvre et Thomas, 1960 Diagnosis: Test spherical, slightly mammillated. Pseudostome regularly lobed like a star with
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F. bipilata, Croatia, Tamnica Frenopyxis bipilata (Baković, Siemensma, Baković and Rubinić, 2019) comb. n. Diagnosis: In dorsal view, the test is rounded and usually slightly wider
D. terrestris, after Berney et al., 2015 Darbyshirella terrestris Berney, Bass & Geisen, 2015 Diagnosis: Non-marine, with morphological characteristics of the genus. Usually above 600 um
A. elenazhivotovae – from Leonov, 2010 Acanthocystis elenazhivotovae Leonov, 2010 Diagnosis: Cell diameter 22-25 µm. Periplast with tangential plate-scales and radial spine-scales. Spine-scales 3.2-6.0 µm,