Pionosyllis is a genus of polychaetes belonging to the family Syllidae.

The genus has cosmopolitan distribution.

Species:

  • Pionosyllis comosa Gravier, 1906
  • Pionosyllis compacta Malmgren, 1867
  • Pionosyllis gigantea Moore, 1908
  • Pionosyllis heterochaetosa San Martín & Hutchings, 2006
  • Pionosyllis kerguelensis (McIntosh, 1885)
  • Pionosyllis koolalya San Martín & Hutchings, 2006
  • Pionosyllis longisetosa (Hartmann-Schröder, 1990)
  • Pionosyllis lucida Chamberlin, 1919
  • Pionosyllis magnifica Moore, 1906
  • Pionosyllis malmgreni McIntosh, 1869
  • Pionosyllis manca Treadwell, 1931
  • Pionosyllis nidrosiensis (Bidenkap, 1907)
  • Pionosyllis petalecirrus Averincev, 1982
  • Pionosyllis stylifera Ehlers, 1912
  • Pionosyllis suchumica Czerniavsky, 1881