WActaeus (animal)
WAncalagon (animal)
WBurgessochaeta
WCanadaspis
WCanadia (annelid)
WCapinatator
WCarnarvonia (animal)
WFasciculus
WGelenoptron
WGogia
WHalwaxiida
WIsoxys
WKootenia
WKutorginata
WLouisella
WMicrodictyon
WNaraoia
WNectocaris
WPikaia
WPortalia
WPriscansermarinus
WRedoubtia
WXanioascus
WYawunik
WYohoia