WAncyrocephalidae
WAnoplocephalidae
WMazocraeidea
WBychowskicotylidae
WCapsalidae
WCatenulidae
WCephalogonimidae
WChimaericolidae
WDactylogyridae
WDavaineidae
WDiphyllobothriidae
WDiplectanidae
WDiplozoidae
WGastrocotylidae
WGyrodactylidae
WHymenolepididae
WMicrocotylidae
WMonocotylidae
WProtomicrocotylidae
WTetrabothriidea