Hydrachnidia Krantz, 1978 - water mites Superfamily Lebertioidea Thor, 1900 Family Limnesiidae Thor, 1900 Subfamily Neomamersinae Lundblad, 1953 Genus Meramecia Cook, 1963 1 Subgenus Meramecia (Meramecia) Cook, 1963 2 Subgenus Meramecia (Parameramecia) Smith & Cook, 1994 3 Subgenus Meramecia (Submeramecia) Cook, 1980