Hydrachnidia Krantz, 1978 - water mites
Superfamily Hydryphantoidea Piersig, 1896 - water mites
Family Hydryphantidae Piersig, 1896
Subfamily Euthyadinae Viets, 1931
Genus Trichothyas Viets, 1926
1 Subgenus Trichothyas (Trichothyas) Viets, 1926
2 Subgenus Trichothyas (Kashmirothyas) Lundblad, 1934
3 Subgenus Trichothyas (Lundbladia) Viets, 1929
4 Subgenus Trichothyas (Neothyas) Lundblad, 1941
5 Subgenus Trichothyas (Plesiothyas) Viets, 1935