WNecrotauliidae
WApataniidae
WBeraeidae
WBrachycentridae
WDipseudopsidae
WEcnomidae
WSnail-case caddisfly
WHydrobiosidae
WHydropsychidae
WHydroptilidae
WLepidostomatidae
WLeptoceridae
WLimnephilidae
WMolannidae
WOdontoceridae
WOeconesidae
WPhilopotamidae
WPhryganeidae
WPolycentropodidae
WPsychomyiidae
WRhyacophilidae
WSericostomatidae
WUenoidae