Hydrachnidia Krantz, 1978 - water mites
Count: [g] 56f;487g [20 Oct 2023]
   Superfamily Hygrobatoidea Koch, 1842
  Count: [g] 12f;234g [20 Oct 2023]
     Family Pionidae Thor, 1900
    Count: [g] 22g [16 Oct 2023]
       Subfamily Hydrochoreutinae Viets, 1942 [monotypic]
      Count: [g] 1g [15 Oct 2023]
         Genus Hydrochoreutes Koch, 1837
        Count: -