Claparède and Lachmann, 1858
Somatic ciliature reduced, left ciliary field in two parts. Oral basket rods often with prominent teeth anteriorly. Stylus may protrude conspicuously. Widely distributed, mainly marine, frequently symphorionts.
Planctonic species recorded:
Dysteria brasiliensis
Dysteria compressa
Dysteria monostyla
Trochilia sigmoides