Table 2 in New Species of Scalibregmatidae (Annelida) from Slope and Abyssal Depths off Eastern Australia

Table 2. Morphological comparison of 17 known species of Oligobregma. Abbreviations: Ant, anterior; Atl, Atlantic; CCZ, Clarion-Clipperton Zone; intPap, interramal papilla; N, north; NeuroC, neuropodial cirri; NotoP, notopodia; NotoC, notopodial cirri; NeuroP, neuropodia; NW, northwest; Pap, papilla; Post, posterior, S, south; SE, southeastern; Set, setiger; W, western.
speciesanterior setigers with acicular spinesprostomiumfirst furcatesegmental annulation patternsposterior parapodiapygidiumdistribution & referencessetaespecies with acicular spines on setigers 1–2O. aciculata (Hartman, 1965)Both rami; spines hirsute2 short rounded frontal?Set 3Not reportedNotoC short, rounded; NeuroC,UnknownW North Atl, abyssal, 4850 m;lobestriangular, pointed; withHartman, 1965interramal PapO. oculata Kudenov & Blake,Both ramiT-shaped, with digitiformSet 3Set 1 smooth; Set 2NotoC narrow, as long as wide;“At least” 2S of New Caledonia, 57 m;1978lateral lobesbiannulate; Set 3NeuroC digitate, 3 times as longanal cirriKudenov & Blake, 1978triannulate; rest withas wide; large intPap4 or 5 annulationsO. pseudocollare Schüller &NotoP onlyWith 2 laterally directedSet 3Set 1–3 smooth; Set 4–9 tri-Short conical dorsal and ventralNo cirriSouthern Ocean; Scotia andHilbig, 2007rounded lobesto quadriannulate,cirriobservedWeddell Seas, 753–3050 m;thereafter with 5Schüller & Hilbig, 2007annulationsspecies with acicular spines on setigers 1–3O. aristata sp. nov.Both rami; spines with2 short forwardly directedSet 5–6Set 1 a single large medialNotoC large, inflated, withUnknownOff Australia lowerterminal aristalobes; these notched inpad; set 2 uniannulate; setnipple-like tip directed dorally;continental slope andholotype3–4 triannulate; set 5–10NeuroC asymmetrical, nipple-abyssal depths, 2793–4031inflated, obscured; setlike tip directed laterallym; This study11–22 tri- to quadriannulateO. collare (Levenstein, 1975)NotoP only; spines hirsute2 short forwardly directedSet 4Set 1–2 smooth; set 3 toNotoC short, bluntly triangular;Up to 8 cirriSouthern Ocean, Antarctica,rounded lobesmid- body triannulate; postNeuroC short, conical; with1622–6070 m; Levenstein,set quadriannulateinterramal Pap1975; Blake, 1981O. mucronata Blake, 2015Both rami; spines w/2 short, forwardly directedSet 4Set 1–2 uniannulate; set 3,NotoC large, triangular, NeuroC4 anal cirriEast Antarctic Peninsula,terminal aristarounded lobesbiannulate; set 4 andlarge, triangular, with broad323–912 m; Blake, 2015following quadriannulatebase; with interramal PapO. notiale Blake, 1981NotoP only2 enlarged, diverging lateralSet 4Set 1 smooth to irregular;NotoC large inflated lobe;5 ventral cirriSouthern Ocean, Antarctica,lobesrest quadriannulateNeuroC small, conical lobe;18–923 m; Blake, 1981with large interramal PapO. profunda sp. nov.Both rami of first row; rarely2 short rounded lobes,Set 5–6Set 1–3 smooth; set 4–endNotoC and NeuroC erect;4 anal cirriOff eastern Australia,in second row of set 1;subapicaltri- to quadriannulatetriangular with pointed tipsTasmania to New SouthNeuroP of set 1‒2, rarely 3;Wales, 3881‒4176 m. Thisfirst row only.study.