Heligmosomoides polygyrus or Nematospiroides dubius?

@article{Behnke1991HeligmosomoidesPO,
  title={Heligmosomoides polygyrus or Nematospiroides dubius?},
  author={Jerzy M Behnke and Anne E. Keymer and John Watkin Lewis},
  journal={Parasitology today},
  year={1991},
  volume={7 7},
  pages={177-9}
}
The intestinal trichostrongylid nematode of mice, Heligmosomoides polygyrus bakeri, is often referred to as Nematospiroides dubius. Here, Jerzy Behnke, Anne Keymer and John Lewis ask the question: which is correct?