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Species characteristics sensu Malmgren (1866)
| Species | Number of notochaetae | Number of neurochaetae | paleae | Opercular rim | Cephalic veil | Origin of the material |
|---|---|---|---|---|---|---|
| L. koreni | 15 | 12 | 14 thin | smooth | with cirri | W coast of Norway and France, 54–91 m |
| A. auricoma | 17 | 13 | 11–13 thin | serrated | with cirri | W coast of Sweden and Norway, 21–183 m |
| P. belgica | 17 | 13 | 10–12 thin | smooth | with cirri | Bohuslän, 73–128 m |
| C. granulata | 17 | 12 | 9(–10) not thin | smooth | with cirri | Greenland, 29–146 m |
| C. hyperborea | 17 | 12 | 12–14 thin | smooth | with cirri | Spitsbergen, Greenland, Finnmark, 18–457 m |
| P. pusilla | 17 | 14 | 11 thin | smooth | smooth | Bohuslän |