Acarapis Hirst, 1921 (original description)
Alaplena Jones, 1921 (original description)
Anteosaurus Watson, 1922 † (original description)
Bainia Broom, 1922 † (original description)
Campatonema Jones, 1921 (original description)
Emydopsis Broom, 1921 † (original description)
Emyduranus Broom, 1921 † (original description)
Eosimops Broom, 1922 † (original description)
Fimbrios Smith, 1921 (original description)
Hydrictis Pocock, 1921 (original description)
Lamellipalpus Maulik, 1921 (original description)
Larentiopsis Jones, 1921 (original description)
Leptotrachelus Watson, 1921 † accepted as Gorgonops Owen, 1876 † (original description)
Neonyssus Hirst, 1922 (original description)
Palemydops Broom, 1922 † (original description)
Ramiella Stephenson, 1921 (original description)
Rhinonyssoides Hirst, 1922 accepted as Ptilonyssus Berlese & Trouessart, 1889 (original description)
Titanohyrax Matsumoto, 1922 † (original description)