Xiphidiata is a suborder of Plagiorchiida, an order of parasitic flatworms (flukes).

The following superfamilies are in the suborder Xiphidiata:

The genus Zdzitowieckitrema, with the single species Zdzitowieckitrema incognitum, described by Sokolov, Lebedeva, Gordeev, & Khasanov in 2017, is yet unplaced within the suborder Xiphidiata.