S
WCancellaria cooperii
WDicyemidaA
WDicyemidae
WHaemadipsaB
WHaemadipsa interrupta
WHaemadipsa pictaC
WMyzostomida
WNematomorphaD
WParagordius tricuspidatus
WParasitic wormE
WPhytobdella catenifera
WSpinochordodes telliniiF
WSquamodisc
WSucker (zoology)