Table 1 Previous classification systems of Nepomorpha
| Â | Å tys and Jansson 1988; Mahner 1993 | Schuh and Slater 1995 | Hebsgaard et al. 2004 |
|---|---|---|---|
Nepoidea | Belostomatidae | Belostomatidae | Belostomatidae |
| Â | Nepidae | Nepidae | Nepidae |
Corixoidea | Corixidae | Corixidae | Corixidae |
Ochteroidea | Ochteridae | Ochteridae | Ochteridae |
| Â | Gelastocoridae | Gelastocoridae | Gelastocoridae |
Notonectoidea | Notonectidae | Notonectidae | Notonectidae |
| Â | Â | Pleidae | Â |
| Â | Â | Helotrephidae | Â |
Pleoidea | Pleidae | Â | Pleidae |
| Â | Helotrephidae | - | Helotrephidae |
Naucoridae | Naucoridae | Naucoridae | Naucoridae |
| Â | Potamocoridae | Potamocoridae | Â |
| Â | Aphelocheiridae | Aphelocheiridae | Â |
Aphelocheiridae | - | - | Potamocoridae |
| Â | Â | Â | Aphelocheiridae |