SEM Images. 17-19 (first column), Owenia caissara sp. n. from Babitonga Bay Polychaeta 17518, 17519. 20-22 (second column), Owenia caissara sp. n. from Paranaguá Bay. 17 and 20, tentacular crown and thorax portion; 18 and 21 band of neuropodial hooks on the first abdominal segment (band median portion of band); 19 and 22, lateral view of hooks on the first abdominal segment. Scale bars: 100 µm (17 and 20), 10 µm (18), 2 µm (19), 20 µm (21), 3 µm (22).