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Webb, 1963

Description:
Protosoma and mesosoma up to 1.5-1.9 mm long. Pinnulus appear in one row when tentacle is extended, but in two rows when it is contracted. Head lobe marked off incompletely by a 'dorsal' groove. The briddle is interrupted in both mid-lines and there is no nearby glandular area.
Tube 243 x 0.21-0.39 mm with light and dark brown rings, but colourless and unringed near each end.

Habitat:
In mud.

Distribution:
Skagerrak, 200-270 m and in Norwegian fjords at 20 m.

Siboglinum fiordicum