Elisesione mezianei sp. n. Holotype (MNHN 1777). A Prostomium, dorsal view B Same, after methyl-green staining C Chaetiger 7, right parapodium, anterior view, dorsal cirrostyle removed, only base left on cirrophore (inset: close-up showing tips of double acicular lobe) D Chaetiger 7, neurochaetal blades, variably eroded; the one on the right has a wider handle due to optical interference, not really wider than the others. Scale bars A, B 0.27 mm, C 0.3 mm, D 20 µm.