- Kingdom: Animalia
- Phylum: Annelida
- Class: Polychaeta
- Subclass: Errantia
- Order: Phyllodocida
- Family: Polynoidae
- Scientific name: Lepidonotus clava
- Norwegian: -
L. clava may very well be confused with the more common L. squamatus. The most obvious difference is that the two rows of scales on the back the L. clava do not overlap. This leaves an unprotected area between the scale rows. The 12 pairs of semitransparent shells have a beige or brown tint. L. clava is slightly smaller than L. squamatus, reaching a maximum length of 45 mm.
Well below the tidal zone, under stones or algal holdfasts.
It is registered in the North Atlantic, the North Pacific, Red Sea, Mediterranean and along the west coast of Africa.