Echinoderes pterus sp. n., scanning electron micrographs. Male (A, DZMB 11662c), collected at station 66 (Mediterranean deep sea off Crete) and females (BZMB 11669b; CZMB 11671e), collected at station 152-1 (Karasik Seamount). A entire animal, lateral view (left side) B head, ventral view C close-up of mouth cone, subdorsal view D close-up of introvert, lateral view (left side). Abbreviations: bsp, bifurcated spinose processes; hea, head; int, introvert; ios, inner oral style; mc, mouth cone; ne, neck; oos, outer oral style; pc, pharyngeal crown; pss, primary spinoscalid; sec, sector; sp, spinoscalid; tr, trichoscalid; tru, trunk. Digits after abbreviations indicate the sector or ring number. White arrows point to spinose structures at basal part of ring -01 inner oral styles. White double arrowheads indicate short spinose processes. Scale bars: 50 µm (A), 10 µm (B), 2 µm (C), 3 µm (D).