Hydromedusa
They are quite closely related to the South American side-necked swamp turtles ( "Acanthochelys" ) and the snake-necked turtles of the Australian-Melanesian region ( "Chelodina" ) , but less closely to the spine-necked river turtles of South America ( "Podocnemididae" ) which belong to a more modern lineage of Pleurodira . 
<triplet> Podocnemididae <subj> Pleurodira <obj> parent taxon