WAdenophorea
WBdelloidea
WCatenulida
WChromadorea
WCraniata (brachiopod)
WEnoplea
WEutardigrade
WGymnolaemata
WHalicryptus
WHeterotardigrada
WLingulata
WMesotardigrada
WLimnognathia
WMonogenea
WMonogononta
WPhascolosomatidea
WPhylactolaemata
WRhynchonellata
WChaetognatha
WSecernentea
WGolfingiida
WTrematoda
WOnychophora