Kent, 1882 emend. Brandt, 1907
Diagnosis
Spheroidal to conical lorica. Bowl separated from collar and pre-collar by nuchal constriction. Thin collar, separated from pre-collar by row of irregular fenestrae; frenestrae also on bowl. Oral end smooth, undulated, or toothed.
Arranged in Subgroup 2B (see the page Ti. 15 Classification scheme based on morphologically similar groups of species).
Species treated:
Petalotricha ampulla (Fol, 1881)