;"Distribution of spines in chaetigers 1–4";"Annulation of chaetigers";"Appearance of podial cirri";"No. of chaetigers";"Presence of furcate chaetae" "O. simplex";"In both rami";"1–2 uni-; 3–4 bi-; 5–12 or 15 quadriannulate";"Chaetigers 20–22";"43 (complete)";"From chaetiger 6" "O. lonchochaeta";"In both rami";"1–4 triannulate";"In posterior chaetigers, detail not given";"22+ (incomplete)";"In mid and posterior chaetigers" "O. quadrispinosa";"In notopodia only";"Anterior quadriannulate; posterior with 5 annuli";"Chaetigers 13–14";"28 (complete)";"From chaetiger 5" "O. brasierae sp. nov.";"In both rami, spines hirsute";"Anterior smooth, posterior quadriannulate";"Chaetigers 13–15";"26 (complete)";"From chaetiger 5" "O. tani sp. nov.";"In notopodia only, spines hirsute, transitional in ch. 4";"Not observed";"Chaetigers 13–15";"18 (incomplete)";"From chaetiger 5" "O. whaleyi sp. nov.";"In both rami";"Anterior smooth, midbody quadriannulate";"Chaetiger 14";"26 (incomplete)";"First observed from chaetiger 11"