Haplotaxis is a genus of annelids belonging to the family Haplotaxidae.

The genus has cosmopolitan distribution.

Species:

  • Haplotaxis acystis Michaelsen, 1903
  • Haplotaxis aedeochaeta Brinkhurst & Marchese, 1987
  • Haplotaxis ascaridoides Michaelsen, 1905
  • Haplotaxis bretscheri Cognetti, 1903
  • Haplotaxis carnivorus Omodeo, 1958
  • Haplotaxis dubius (Hrabĕ, 1931)
  • Haplotaxis emissarius (Forbes, 1890)
  • Haplotaxis gastrochaetus Yamaguchi, 1953