WAntennacanthopodia
WBeorn (tardigrade)
WDiania
WPaucipodia
WSharpirhynchia
WSomalirhynchia
WAcutuncus
WAmericobdella
WCamerata robusta
WCristatella
WFasciolopsis
WGastrodiscoides
WHausera
WRiftia pachyptila
WSonatsa
WMesotardigrada
WTitaniloricus
WTyrannobdella