Species;"Dorsolateral edge of basal scale";"Pairs of body wall scales";"Polychaete commensalism";"Branching mode";"Body wall scale thickness";"Coenenchymal scales: imbricate, thickness; ridged";"Polyps/whorl; whorl diameter (mm)";"Polyp length (mm)";"Distal edge of basal scales";"Other characters";"Geographic and depth range" "N. macrocalyx Cairns & Bayer, 2007";"Small ridge";3;Present;Sparse,;Thin;"Thin, imbricate; rarely ridged";"4–6; 7–11";4.5–5.5;"Lobate, smooth";;"Hawaiian Islands, 1206–1807 m" "N. gilchristi (Thomson, 1911)";"Small ridge";3;Present;"lyrate, secondarily dichotomous";Thin;"Thick, mosaic; unridged";"4–8; 4–9";2––3;"Lobate, smooth";;"Southwest Indian Ocean, 90–1365 m" "N. ferula Cairns, 2018";Multi-ridged;3;Absent;Unbranched;Thin;"Thin, imbricate; ridged";"2–3; 3.6";2.3–2.5;"Serrate cowl, spurs";"Medial scales also with serrate margin";"Palmyra Atoll, 1023 m" "N. hawaiinensis Cairns & Bayer, 2007";"Inconspicuous basal ridge";3;Absent;Unbranched;Thin;"Thin, imbricate; ridged";"3–5; 5–6";3.4–4.1;"Lobate, smooth";;"HI, Johnston Atoll, 1492–1944 m" "N. muzikae Cairns & Bayer, 2007";Multi-ridged;3;Absent;"Common coenosteum (bolus)";Thin;"Thin, imbricate; ridged";"3–6; 3–4";1.7–2.2;"Lobate, serrate";"Base strongly calcified";"Hawaiian Islands, 326–381 m" "N. merga Cairns, 2018";"Two ridges basally";3;Absent;Y-shaped;Thin;"Thin, imbricate; ridged";"3; 4.4";4;"Lobate (short cowl)";;"Wake Island, 2575 m" "N. fordi Cairns, 2018";Multi-ridged;3;Absent;"Sparse, equal dichotomous";Thin;"Thin, imbricate; ridged";"3;3.4–3.5";2.1–2.6;"Lobate, smooth";"Medial scales ridged";"Phoenix Islands, 1899 m" "N. cristata Cairns & Baco, 2007";"Single ridge";3;Absent;"Sparse, equal dichotomous";Thin;"Thin, imbricate; ridged (sail scales)";"2–4; 3.4";2.1–3.0;"Lobate, smooth";"Medial and buccals ridged; occasionally four pairs of bw scales";"Gulf of Alaska seamounts, 3385 m" "N. alvinae Cairns & Bayer, 2003";"Single ridge";3;Absent;"Sparse, equal dichotomous";Thin;"Thin, imbricate; ridged";"4; 3.8";2.7–3.1;"Lobate. smooth";"Medial scales elongate";"Bermuda, 3419 m" "N. bayeri Cairns & Baco, 2007";"Single ridge";3;Absent;"Sparse, equal dichotomous";Thin;"Thin, imbricate; ridged (sail scales)";"5–7; 3.5";2.2–3.4;"Lobate, smooth";"Medial scales ridged";"Gulf of Alaska seamounts, 3277–4091 m" "N. alaskensis Cairns & Baco, 2007";"Low ridge";3;Absent;"Sparse, equal dichotomous";Thin;"Thin, imbricate; ridged (sail scales)";"5–9; 7.5";2.7–3.2;"Lobate (narrow), smooth";"Medial scales ridged";"Gulf of Alaska seamounts, 2377–3075 m" "N. arbuscula Cairns & Baco, 2007";"Tall, short ridge";3;Absent;"Sparse, equal dichotomous";Thin;"Thin, imbricate; ridged (sail scales)";"6–7; 6.8";3.4–4.7;"Lobate, smooth";"Whorls crowded";"Gulf of Alaska seamounts, 2775–3465 m" "N. pauciflora Deichmann, 1936";Multi-ridged;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; complex ridging";"2–5; 4";2.6–2.8;"Lobate, smooth";"Adaxial buccals as ridged ascus scales";"Northwest Atlantic, 738–1473 m" "N. bowersi (Nutting, 1908)";"One ridge basally";3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; ridged";"3–4; 4.5";2.5–3.2;"Tall, serrate";"Buccal scales serrate";"Hawaiian islands, 1218–1758 m" "N. gaussi (Kükenthal, 1912)";Multi-ridged;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; ridged";"4–5; 3";2.1–3.0;"Lobate (low), smooth";"Radial ridges on all body wall scales";"Antarctica, 2450 m" "N. parva (Versluys, 1906)";Multi-ridged;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; ridged";"4–6; 2.5–3.2";2.0–2.4;"Tall, narrow, smooth";"Adaxial buccal scales ridged";"Southwest Pacific, 920–2400 m" "N. regularis (Duchassaing & Michelotti., 1860)";Multi-ridged;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; ridged";"4–5; 3.2";2.0–2.3;"Lobate, smooth";"Medial and buccals ridged";"Northwest Atlantic, 366 – 792 m" "N. valentine Taylor & Rogers, 2017";"One tall ridge";3;Absent;"Lyrate, secondarily dichotomous";Thin;"Thin, imbricate; flat";"4–5; 2.4–2.8";1.5–1.8;"Tooth-like apex";"Medials ridged";"Southwest Indian Ocean, 383–444 m" "N. virgosa Cairns, 2018";Multi-ridged;3;Absent;"Lyrate, secondarily dichotomous and bushy";Thin;"Thin, imbricate; ridged (sail scales)";"3–4; 3.3–4.2";2.6–2.8;"Lobate, smooth";"Medials and buccals ridged";"Hawaiian Islands and Johnston Atoll; 1901–1985 m" "N. bellissima (Kükenthal, 1915)";"Low ridge basally";3;Absent;"Lyrate, secondarily dichotomous";Thin;"Thin, imbricate; ridged (sail scales)";"3–8; 3.15";2.0–2.2;"Lobate, smooth";;"Amphi-Atlantic, 161–1968 m" "N. ornata Bayer, 1995";Multi-ridged;3;Absent;Unknown;Thin;"Thin, imbricate; ridged";"3–4; 3.5";3;"Serrate distal margin";"All scales, including adaxial buccals, radially ridged";"Hawaiian Islands, 748–1007 m" "N. spectablis Cairns & Bayer, 2003";"One tall ridge";4;Absent;Unbranched;Thin;"Thin, imbricate; ridged (sail scales)";"3; 2.8";3.5;"Lobate, smooth (low)";"All body wall scales ridged";"Bahamas, 1485 m" "N. abyssalis Cairns & Baco, 2007";Multi-ridged;4;Absent;"Sparse, dichotomous";Thin;"Thin, imbricate; ridged (sail scales)";"2–4; 2.8";1.9–2.4;"Lobate, smooth (low)";"All body wall scales ridged";"Gulf of Alaska seamounts, 4594 m" "N. laxa Deichmann, 1936";Absent;4;Absent;"Equal dichotomous";Thin;"Thin, imbricate; multiple ridges";"3–5; 3.6";3;"Lobate, smooth";"3 pairs of adaxial buccal scales";"Amphi-North Atlantic, 2980–3186 m" "N. horrida (Versluys, 1906)";Absent;3;Present;"From common bolus";Massive;"Thick, mosaic; unridged";"5–6; 6–9";2.0–3.4;"Spinose (massive)";"Medial scales also spinose";"Indonesia, 204 m" "N. hypsocalyx Cairns, 2012";Absent;3;Present;"From common bolus";Thin;"Thin, imbricate; unridged";"9; 13";2.7;"Tall and serrate";"Adaxial buccals elongate";"New Zealand, 510–1118 m" "N. clavata (Versluys, 1906)";Absent;3;Present;"Sparse, dichotomous";Massive;"Thick, mosaic; unridged";"4–14; 7–8";2––3;"Tall, narrow, smooth";"Adaxial buccals numerous";"Indonesia, Philippines, 128–335 m" "N. ambigua (Studer, 1894)";Absent;3;Present;"Sparse, dichotomous";Thin;"Thick, mosaic; unridged";"5–7; 6–7";2.5–3.0;"Lobate, tall, smooth";"3 pairs adaxial buccals";"Galapagos, Gulf of Panama, 702– 1463 m" "N. aurantiaca Cairns, 2018";Absent;3;Present;"Sparse, dichotomous";Thin;"Thin, interlocking; ridged";"4–6; 6.5–7.0";2.8–3.2;"Lobate, smooth";;"Wake Island, 745 m" "N. leilae Bayer, 1951";Absent;3;Present;"Sparse, dichotomous";Thin;"Thin, imbricate; ridged (sail scales)";"4–6; 5.2–5.6";2.0–2.5;"Serrate cowl";"Edges of buccals undulate";"Indonesia, 740 m" "N. alata Cairns & Bayer, 2007";Absent;3;Present;"Equal dichotomous";Thin;"Thin, imbricate; medial scale";"4–5; 4–5";2.5–3.1;"Lobate, tall (cowl), smooth";"Whorls closely spaced";"Hawaiian Islands, 477–750 m" "N. vermifera Cairns & Bayer, 2007";Absent;3;Present;"Equal dichotomous";Thin;"Thick, mosaic; very low ridges";"3–5; 4";1.8–2.0;"Lobate, tall, smooth";"Buccals in closed position";"Hawaiian Islands, 275–527 m" "N. allmani (Wright & Studer, 1889)";Absent;3;Present;"Equal dichotomous";Thin;"Thick, mosaic; unridged";"4–7;5";3;"Tall, serrate";;"Fiji, depth unknown" "N. obscura (Versluys, 1906)";Absent;3;Present;"Equal dichotomous";Thin;"Thick, mosaic; unridged";"4–6; 6–7";2.7–2.8;"Lobate (undulate), smooth (cowl)";;"Indonesia, 984 m" "N. dampieri Cairns, 2012";Absent;3;Present;"Equal dichotomous";Thin;"Thick, mosaic; unridged";"5–8; 7";1.4–1.9;"Lobate, tall, narrow";"Numerous adaxial buccal scales";"Lord Howe Islands, 342 m" "N. mosaica Cairns, 2012";Absent;3;Present;"Equal dichotomous";Massive;"Thick, mosaic; unridged";"3–5; 5–6";2.7–3.1;"Lobate, slender, smooth";;"New Zealand, 228–294 m" "N. vulgaris Cairns, 2012";Absent;3;Present;"Equal dichotomous";Massive;"Thick, mosaic; unridged";"4–6; 4–5";2.0–2.4;"Lobate, smooth";"2 pairs adaxial buccals are ridged";"New Zealand, 335–1165 m" "N. orientalis (Versluys, 1906)";Absent;3;Present;Unknown;Thin;"Thin, imbricate; unridged (concave)";"6; 5.8";2.2–3.0;"Lobate, smooth";;"Indonesia, 520 m" "N. calamus Cairns, 2018";Absent;3;Absent;Unbranched;Thin;"Thin, imbricate; ridged (sail sacles)";"4; 5";4.5–5.0;"Serrate, blunt";;"Wake Island, 2073 m" "N. versluysi (Hickson, 1909)";Absent;3;Absent;"Unbranched or very sparsely";Thin;"Thin, imbricate; medial ridge";"4–7; 5–7";3.2–3.7;"Lobate, smooth";"Basal scale ridged internally";"Amphi-North Atlantic, 550–3100 m" "N. speighti Taylor & Rogers, 2017";Absent;3;Absent;"Sparse, dichotomous";Thin;"Thin, imbricate; unridged";"3–4; 2.5–3.6";2.0–2.2;"Lobate (slender), smooth";;"Southwest Indian Ocean, 870 m" "N. grandiflora (Kükenthal, 1907)";Absent;3;Absent;"Sparse, dichotomous";Thin;"Thick, mosaic; unridged";"4–5; 4.5";3;"Lobate, smooth";"Numerous adaxial buccal scales";"Indonesia, 805 m" "N. studeri (Versluys, 1906)";Absent;3;Absent;"Equal dichotomous";Massive;"Thick, mosaic; unridged";"4–8; 4–5";3.0–3.3;"Lobate, smooth";"Smooth body wall scales";"New Zealand, Indonesia, 732–1392 m" "N. biannulata (Kinoshita, 1907)";Absent;3;Absent;"Equal dichotomous";Massive;"Thick, mosaic; unridged";"6–7; 4.8";1.8–2.0;"Lobate, smooth";"Adaxial buccals absent; medial scales closed";"Japan, depth unknown" "N. candidae Taylor & Rogers, 2017";Absent;3;Absent;"Equal dichotomous";Thin;"Thick, mosaic; unridged (smooth)";"4–6; 4–5";2.0–2.4;"Lobate, smooth";;"Southwest Indian Ocean, 763 m" "N. japonensis (Aurivillius, 1931)";Absent;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; unridged";"3–6; 3.5–4.0";2––3;"Lobate, smooth";"Stem stiff";"Japan, 732 m" "N. gigas Cairns & Bayer, 2007";Absent;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; ridged";"10–14; 9–12";2.5–3.0;"Lobate, tall, narrow, smooth";;"Hawaiian Islands, 362–399 m" "N. dichotoma (Versluys, 1906)";Absent;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; low ridges";"3–5; 4–5";2.8–3.1;"Lobate, smooth";;"Hawaiian Islands, Malaysia, 204–1448 m" "N. megalepis (Kinoshita, 1908)";Absent;3;Absent;"Equal dichotomous";Thin;"Thin, imbricate; ridged";"5–8; 6–7";2.5–3.0;"Lobate, smooth";"Numerous small adaxial buccal scales";"Japan, depth unknown" "N. compressa (Kinoshita, 1908)";Absent;3;Absent;Lyrate;Massive;"Thick, mosaic; unridged";"7–8; 3";2;"Lobate, smooth";;"Japan, Phoenix Islands, 501 m"