Echinoderes pterus sp. n. showing a geographically and bathymetrically wide distribution pattern on seamounts and on the deep-sea floor in the Arctic Ocean, Atlantic Ocean, and the Mediterranean Sea (Kinorhyncha, Cyclorhagida)

Echinoderes pterus sp. n., Nomarski photomicrographs. The holotype male (A, FZMB 11608), collected at station 55 (Mediterranean deep sea off Crete), a male (EZMB 11609), collected at station 24 (Mediterranean deep sea off Crete), and a female (B–DZMB 11635), collected at station 1167.1 (Mediterranean deep sea of Crete). A entire animal, ventral view B neck, dorsal view C neck, ventral view D segments 1–6, dorsal view E segments 3–7, ventral view F segments 4–7, dorsal view. Abbreviations: lts, lateral terminal spine; lvs, lateroventral acicular spine; lvt, lateroventral tube; mdp, middorsal placid; mds, middorsal acicular spine; mvp, midventral placid; trp, trichoscalid plate. Digits after abbreviations indicate the corresponding segment number. Black arrows mark sensory spots; white arrowheads point to type-1 gland cell outlets. Scale bars: 100 µm (A), 20 µm (B–D).