Daylithos japonicus sp. nov. Holotype (NSMT-Pol H-903). A. Whole body, lateral view; B. Anterior end, lateral view; C. Prostomium, frontal view; D. Prostomium, lateral view; E. Notochaetae, chaetiger 12; F. Distal part of notochaetae; G. Basal part of notochaetae; H. Neurohook, chaetiger 12. Scale bars: 5 mm (A); 2.5 mm (B); 0.5 mm (C); 0.1 mm (D); 200 μm (E); 100 μm (F); 100 μm (G); 200 μm (H). Abbreviations: cc, cephalic cage; lb, large branchia; sb, small branchia; p, palp; dl, dorsal lip; ll, lateral lip; vl, ventral lip.