Prosphaerosyllis modinouae sp. nov. (SEM micrograph) a specimen (paratype, NHM.2018.24386) in dorsal view b anterior end in dorsal view c paratype (NHM.2018.24236) in dorso-lateral view d detail of prostomium of paratype (NHM.2018.24236) with palps (P), median antenna (Ma), lateral antennae (La), tentacular cirrus (Tc) and dorsal cirrus (Dc) e detail of dorsal cirri with those on chaetigers 2–4 (paratype, NHM.2018.24386) f pattern of dorsal body papillae (marked by white circles) (paratype, NHM.2018.24386). Scale bars: 500 µm (a); 100 µm (b, e); 200 µm (c); 50 µm (d).