Okuda, 1937
Description: 
Prostomium anteriorly rounded, with four eyes and a tiny median antenna, posteriorly with a caruncle reaching the third segment. Two long palps present. 
First notopodium usually without chaetae.
Fifth chaetiger with modified chaetae in two U-shaped rows: the inner row with 10-14 simple blunt chaetae; the outer row with 8-14 thick chaetae with slender curved tips and subdistal constrictions. 
8th and following neuropodia with 6-10 hooded hooks (P. paucibranchiata-detail). 
Gills from chaetiger 7 to 15-35. 
Pygidium with dorsally incised funnel.
Size: 
Up to 12 mm for 60 segments. 
Colour:
Living animal pale yellow to white. 
Habitat:
In the Oslofjord on mud, 15-25m deep.
Distribution:
Oslofjord, North and South Pacific.