Euphrosinopsis ahearni sp. nov. (holotype NHMUK ANEA.2022.652) A preserved specimen in dorsolateral view, pygidial cirri marked by arrows B specimen Shirlastained in dorsolateral view, pygidial cirri marked by arrows C detail of prostomium in dorsal view with palps (p) and lateral antennae (la) marked by arrows D, E branched branchiae (br) and lateral cirrus (cir) of midbody chaetigers F detail of midbody chaetigers, median antenna (ma) marked by arrow. Scale bars: 1 mm. Abbreviations: P – palps, la – lateral antennae, cir – cirrus, br – branchiae, ma – median antenna.