Paulinellidae De Saedeleer 1934, emend. Adl et al. 2012
Diagnosis: Pyriform, uncompressed shape; scales, when present, long, with length perpendicular to aperture. At least two genera (Ovulinata, Micropyxidiella ) with totally organic test without silica scales.
Tracheleuglypha dentata, Ecuador (l) and the Netherlands (r) Tracheleuglypha dentata (Vejdovsky, 1882) Diagnosis: test clear, elliptical, round in cross-section; with circular, overlapping scales; no spines