Sosane wahrbergi is a very small species, only up to 4 mm long. It can be found along the entire Norwegian coast at depths between 20 and 300 meters.
Koster Islands, Sweden, 20–80.
Measurements: Up to 4 mm long.
Number of thoracic chaetigers, excluding paleae: 12
Number of thoracic uncinigers: 9
Number of abdominal uncinigers: 12
Prostomium: Trilobed; one pair of eyespots.
Mouth tentacles: Smooth.
Branchiae: Three pairs of branchia in two widely separated groups; branchiae arranged in triangles.
Paleae: Small with filiform tips; 15–20 chaetae on each side.
Special features: 12th pair of thoracic notopodia elevated and laterally enlarged; chaetae usually crossing mid-dorsally.
Pygidium: With long lateral cirri.
Tube: Thin layer of organic secretion incrusted with mud.
Entire Norwegian coast; 20–300 m.
Holthe T (1986a). Polychaeta Terebellomorpha. Marine Invertebrates of Scandinavia 7: 1-192.
Personal observations, Alvestad T.