Hydrachnidia Krantz, 1978 - water mites Superfamily Lebertioidea Thor, 1900 Family Limnesiidae Thor, 1900 Subfamily Tyrrelliinae Koenike, 1910 Genus Tyrrellia Koenike, 1895 1 Subgenus Tyrrellia (Tyrellia) Banks, 1904, orth. inval. see Subgenus Tyrrellia Koenike, 1895 2 Subgenus Tyrrellia (Scutotyrrellia) Cook, 1974