A–E Nereis tricirrata sp. nov. holotype (TIO-BTS-Poly-137) and F paratype (TIO-BTS-Poly-138) A notochaetae, homogomph spiniger, chaetiger 40 B neurochaetae, homogomph spiniger, dorsal fascicle, chaetiger 5 C neurochaetae, heterogomph spiniger, ventral fascicle, chaetiger 40 D notochaetae, homogomph falciger, chaetiger 40 E neurochaetae, heterogomph falciger, dorsal fascicle, chaetiger 20 F notochaetae, homogomph falciger, posterior parapodia. Scale bars: 50 μm (A–F).