Authors: "H. legendrei sp. nov. can be differentiated from H. vestimentifera, by having a sac-like structure (Fig. 2A–B) present ventro-laterally in proboscis (absent in H. vestimentifera). Furthermore, H. legendrei sp. nov. differs from H. vestimentifera, in having a greater number of distal papillae (about 20–27 observed) versus 13–14 (Blake 1985) or 10–15 (Pleijel 2004), notopodial hook from segment 7–8 (chaetigers 3–4) instead of segment 8–9 (chaetigers 4–5), and notopodia lobes with multiple slender aciculae in only the first 5 segments instead of the first 4 segments in H. vestimentifera."