Loricate, occasionally very weakly loricate. Lorica usually more or less dorso-ventrally depressed, angular, rectangular or hexagonal; anterior margins of lorica often with spines, caudally with or without spines or extensions; head and foot retractable in lorica. Foot present or absent, if present long and wrinkled or with pseudosegments; two small toes. Corona frontal with reduced ciliation, usually with single dorsal and 2‒4 humps with short cilia and cirri. Trophi malleate.
Genera:Anuraeopsis Lauterborn, 1900 Brachionus Pallas, 1766 Kellicottia Ahlstrom, 1938 Keratella Bory de St.Vincent, 1822 Notholca Gosse, 1886 Plationus Segers, Murugan & Dumont, 1993 Platyias Harring, 1913 Schizocerca