| Type of | : | Hydrachnidae (Family) Leach, 1815 | |
Ref: J. Hallan (comp.), [2003]: [25 Jul 2016]. [inferred] |
| Type of | : | Hydrachnoidea (Superfamily) Leach, 1815 | |
Ref: J. Hallan (comp.), [2003]: [25 Jul 2016]. [inferred] |
| Nominotypical taxon [ICZN] | : | Hydrachna (Subgenus) Müller, 1776 | |
Ref: J. Hallan (comp.), [2003]: [25 Jul 2016]. [inferred] |