Key to species of Paranerilla Jouin & Swedmark, 1965
1. Acicular spine absent........................................................................................................................ 2
– Acicular spine present.............................................................. P. schiavettii sp. nov., South Atlantic
2. Dorsal surface densely ciliated................... P. cilioscutata Worsaee & Kristensen, 2003, Arctic Sea
– Dorsal surface weakly ciliated............................... P. limicola Jouin & Swedmark, 1965, North Sea