taxonID	type	description	language	source
03CE472CFFB3FF99FF7AFFD2FB2B9CE0.taxon	materials_examined	Material examined. Type material. Australia [ZMH P – 15534, holotype], Broome, 8.9.75, Probe 5.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFB3FF99FF7AFFD2FB2B9CE0.taxon	description	Description. Colour, body shape, and size. Body cream coloured. Holotype complete. Body length 4 mm, width 0.25 mm. Tube unknown. Branchial lobes and branchial crown. Insertion of the branchial crown exposed beyond collar dorsally (Fig. 4 B). Branchial crown length 2 mm. Five radiolar pairs. Radioles with long pinnules. Radiolar tips extremely long (Figs 4 A – B). The palmate membrane extends a half the length of the branchial crown. Lateral flanges very narrow. Dorsal lips triangular, erect, without mid-rib. Ventral lips rounded, small. Peristomium. Anterior peristomial ring lobe not exposed beyond collar, distally entire, triangular. Posterior peristomial ring collar: antero-dorsal margins entire (Fig. 4 B), lateral margins folded (not incised), ventral margin sligthly higher than dorsal; entire length of mid-dorsal collar margin forms a narrow gap (Fig. 4 B). Dorsal pockets not developed. Ventral shield of collar horseshoe-shaped, three times wider than long, swollen (Fig. 4 A). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 1: 1. Thorax. Chaetigers 2 to 8: notopodia – two irregular rows of elongate, narrowly hooded chaetae (Figs 4 C, E); one anterior row with bayonet chaetae; two posterior rows with symmetrical; paleate chaetae with a medium-sized mucro (Fig. 4 D); neuropodia – one row of acicular uncini per torus, main fang surmounted by four rows of teeth equal in size, occupying half of the main fang length. Glandular ridge on chaetiger 2 very narrow. Abdomen. Abdominal segments: 32. Anterior segments: two transverse rows of elongate, narrowly hooded chaetae, chaetae from the upper row half as long as chaetae in lower row; uncini with the main fang surmounted by five regular rows of teeth in frontal view, equal in size, occupying one-half the length of main fang, main fang not extending beyond breast, breast rectangular. Posterior segments: 2 – 3 very elongate, narrowly hooded chaetae; modified uncini with the main fang surmounted by six to seven regular vertical rows of teeth equal in size, occupying three-quarters the length of main fang, main fang not extending beyond breast, breast rectangular. Pygidium with a triangular posterior margin (Fig. 4 A). Gametes. Holotype inmature. Methyl green staining. Ventral collar shield not stained (Fig. 4 A); thorax with epidermis completely glandular, stains uniformly, dorsal and ventrally (Figs 4 A – B); abdomen less coloured (Fig. 4 A).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFB3FF99FF7AFFD2FB2B9CE0.taxon	discussion	Remarks. Chone australiensis was described as having the lateral collar margin incised, as Hartmann- Schröder (1979) shows in her figure 364; however, re-examination of the holotype shows that the lateral margin of collar is entire. The drawings of Hartmann-Schröder were made with the holotype mounted in a slide, where the collar is folded, not incised. Chone australiensis and C. normani have the anterior abdominal uncini with equal sized teeth above the main fang. In C. australiensis, the ratio of posterior peristomial ring collar length versus chaetiger 2 length is 1: 1 (1.5: 1 in C. normani); the radiolar flanges are narrow (broad in C. normani); extra long radiolar tips (medium-sized in C. normani); the anterior peristomial ring lobe is triangular, not exposed beyond collar (bilobed, exposed beyond collar in C. normani) and short mucro (long in C. normani) (Table 2).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBCFF9AFF7AF8DAFDE098A0.taxon	materials_examined	Material examined. Type material. K ē rgu ē len [ZMB 894, holotype], Great Whale Bay, 24.1 m, Expedition Gazelle. Additional material. Chone gracilis Moore, 1906 [USNM 5513, holotype], [ANSP 1 – 24, paratype]. Description. Colour, body shape, and size. Body cream coloured. Holotype incomplete (no posterior abdomen). Body length 25 mm, width 6 mm. Tube unknown. Branchial lobes and branchial crown. Insertion of the branchial crown not exposed beyond collar (Fig. 5 A). Branchial crown length 24 mm. Radioles: 19 pairs. Radioles with median pinnules three times longer than more proximal pinnules. Radiolar tips medium-sized (Fig. 5 D). The palmate membrane extends about three quarters the length of the branchial crown. Lateral flanges narrow (Fig. 5 D). Dorsal lips broadly rounded, as long as wide, without mid-rib. Dorsal pinnular appendages: one short pair. Ventral lips rounded, as long as wide, about one quarter the length of the dorsal lips. Ventral radiolar appendages: 8 short pairs (less than one quarter the length of the branchial crown length).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBCFF9AFF7AF8DAFDE098A0.taxon	description	Peristomium. Anterior peristomial ring lobe not exposed beyond collar, distally entire, triangular. Posterior peristomial ring collar: antero-dorsal (Fig. 5 A) and lateral margins entire (Fig. 5 C), ventral margin higher than dorsal, incised (Fig. 5 B); longitudinal grooves on ventral side of collar; entire length of mid-dorsal collar margin forms a broad gap (Fig. 5 A). Dorsal pockets well developed (Fig. 5 A). Ventral shield of collar swollen, horseshoe-shaped, three times wider than long (Fig. 5 B). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 1.5: 1. Thorax. Chaetigers 2 to 8: notopodia – two irregular rows of elongate, narrowly hooded chaetae; one anterior row with bayonet chaetae; two posterior rows with symmetrical; paleate chaetae with a medium-sized mucro; neuropodia – two irregular rows of acicular uncini per torus, main fang surmounted by three rows of teeth (Fig. 5 F), second tooth enlarged, located in the midline, dentition covering one quarter of the main fang length (not illustrated). Glandular ridge on chaetiger 2: narrow. Abdomen. Abdominal segments: 7. Anterior uncini with the main fang surmounted by four rows of teeth equal in size, occupying less than half the length of main fang, main fang not extending beyond breast, breast rectangular (Fig. 5 G). Posterior uncini similar but with three rows of teeth (Figs 5 H). Pygidium unknown. Gametes. Holotype mature male, spermatozoa with barrel-shaped nucleus, triangular, elongate acrosome and two rounded mitochondria (Fig. 5 E). Methyl green staining. Ventral shield of collar stains uniformly, except for a transversal, M-shaped median line (Fig. 5 B); lateral and dorsal sides of collar darker than following segments (Fig. 5 C). Thorax and anterior abdomen with epidermis completely glandular, stains uniformly, dorsal and ventrally (Figs 5 A – C), except for the faecal groove (Fig. 5 A).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBCFF9AFF7AF8DAFDE098A0.taxon	discussion	Remarks. Sabella costulata is transferred to Chone because it has branchial lobes fused dorsally; palmate membrane and radiolar flanges present; dorsal lips broadly rounded, as long as wide, without mid-rib; ventral lips present, broadly rounded; dorsal pinnular appendages present; ventral radiolar appendages present; glandular ridge on chaetiger 2; elongate, narrowly hooded chaetae, bayonet and paleate chaetae, acicular uncini with second tooth enlarged, located in the midline; anterior and posterior abdominal uncini with well developed rectangular breast, handles absent, main fang well developed, few rows of small teeth covering one half (or less) of the main fang length. The unique distinctive features of C. costulata are: anterior margin of collar incised ventrally; entire length of mid-dorsal collar margin forms a broad gap; dorsal pockets well developed; and ventral collar shield is horseshoe-shaped with a median, transversal M-shaped line. Other species with the ventral margin of collar incised is C. gracilis, however, the holotype of this species has the incision probably due to a regeneration process; in the paratype it is entire.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBFFF9FFF7AFAD0FDCE9D68.taxon	materials_examined	Material examined. Non-type material. Norway [ZMUB] 25115 Saltenfjord, 1900, 15 – 20 m, Leg. Nordgaard (1); 25488 Skjaergården Sta. 91, Leg. Appeløf (1). [ZMO] Bergen, Sta. 60, 29 / 4 (1); Oslofjorden, Vausu, Sars 90 (6). Scotland [NMW. Z] Sullom Voe, Shetland: 1986.112.0 0 97, Sta. 6 F, coarse silt, 5 m, Coll. OPRU 1985 (1); 1986.112.0 0 98, Sta. OV 4.1, very fine sand, 16 m, Coll. OPRU 1985 (1); 1987.137.0 0 25, Sta. 6, 8 m, Coll. OPRU (DL), June 1987 (1); 1987.137.0 0 26, Sta. OV 3, 17 m, Coll. OPRU (DL), June 1987 (1); 1997.078.0 0 63, Sta. B 49, J, very fine sand, 53 m, Coll. IOE (1). Calback Ness and Little Roe, Sullom Voe, Shetland Isles: 1997.078.0 0 64, between, Sta. B 49, K, medium sand, 31 m, Coll. IOE (1); 1998.062.0 0 62, Sta. B 48, K, medium sand, 32 m, Coll. IOE, April 1988 (4). Northern North Sea [NMW. Z] Norway Ekofisk Oilfield: 2000.002.0 0 0 6, Sta. E 87, 31, 56 36 ’ N, 03 ° 12 ’ E, very fine sand, 68 m, Coll. OPRU, July 1987 (1); 2000.011.0 0 13, Sta. E 80, 18, 56 ° 36 ’ N, 03 ° 12 ’ E, very fine sand, 71 m, Coll. OPRU, August 1980 (1); 2000.011.0 0 14, Sta. E 80, 17, 56 ° 36 ’ N, 03 ° 12 ’ E, very fine sand, 71 m, Coll. OPRU, August 1980 (1). [ZMH] P – 15204, S. Loreley Bank, 4.5 JM, Grobsand & etw Schill, 37 m, April 25, 1966, Coll. STRIPP (1). Additional material. Chone aurantiaca (Johnson, 1901) [MCZ 1933, holotype]. Chone magna (Moore, 1923) [USNM 17281, holotype]. Chone picta (Verrill, 1885) [YPM 30000, topotypes]. Chone veleronis Branchial lobes and branchial crown. Insertion of the branchial crown exposed dorsally beyond collar (Fig. 6 A). Radioles: 12 – 22 pairs. Radioles with median pinnules slightly longer than proximal pinnules. Radiolar tips long. The palmate membrane (pm) extends about three quarters the length of the branchial crown (Figs 6 E, J). Lateral flanges (fl) broad (Fig. 6 J). Dorsal lips broadly rounded in frontal view, as long as wide, without mid-rib, resembling the ventral lips, longer than wide in dorso-lateral view. Dorsal pinnular appendages (dpa): 1 – 4 short pairs united by a palmate membrane (Fig. 6 K). Ventral lips rounded, as long as wide, about one quarter the length of the dorsal lips. Ventral radiolar appendages: 1 – 2 pairs, short, as long as basal pinnules of the ventral most radiole. Peristomium. Anterior peristomial ring lobe (aprl) not exposed beyond collar, distally entire, triangular (Fig. 6 B). Posterior peristomial ring collar: antero-dorsal (Fig. 6 A), ventral and lateral margins entire (Figs 6 B, E), ventral margin higher than dorsal (Fig. 6 B); longitudinal grooves on dorsal, ventral and lateral sides of collar; entire length of mid-dorsal collar margins forms a broad gap. Dorsal pockets well developed. Ventral shield of collar rounded (Fig. 6 E) (not easily discernible). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 2: 1.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBFFF9FFF7AFAD0FDCE9D68.taxon	description	Thorax. Chaetigers 2 to 8: notopodia – two irregular rows of elongate, narrowly hooded chaetae (Fig. 6 I); one anterior row with narrow bayonet chaetae (Fig. 6 G); two posterior rows with symmetrical; paleate chaetae with a short mucro (Fig. 6 H); neuropodia – two irregular rows of acicular uncini per torus (Fig. 6 F), second tooth enlarged, located in the midline, dentition covering one quarter of the main fang length. Glandular ridge on chaetiger 2 narrow. Abdomen. Abdominal segments: 68 – 74. Anterior (Fig. 6 C) and posterior uncini (Fig. 6 D) similar, with the main fang surmounted by four rows of teeth equal in size, occupying less than half the length of main fang, main fang not extending beyond breast, breast rectangular. Pygidium with rounded posterior margin. Methyl green staining. Body stains uniformly, except for the anterior margin of collar (Figs 6 A – B, E).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBFFF9FFF7AFAD0FDCE9D68.taxon	discussion	Remarks. In C. fauveli, C. aurantiaca, C. magna, C. picta and C. veleronis, the ventral margin of collar is higher than dorsal margin, and the ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view is 2: 1. Chone fauveli and C. veleronis have broad flanges and radiolar tips long, but the glandular ridge on chaetiger 2 is rounded in C. fauveli and sunglasses-shaped extending to the first half of the third segment in C. veleronis. The mucro of the paleate chaetae in C. fauveli is short while it’s missing in C. magna and C. picta, and minute, hair-like in C. aurantiaca. Among species of Chone included in this revision, C. fauveli is unique by having a rounded ventral shield of collar (Table 2). Chone infundibuliformis Kr Ø yer, 1856 new synonymy Figure 7	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBFFF9FFF7AFAD0FDCE9D68.taxon	materials_examined	Material examined. Type material. Chone infundibuliformis Kr ø yer, 1856 [ZMUC POL – 1749, lectotype], [USNM 376, paralectotype], [BMNH 82.5.12.33, paralectotype]. Chone suspecta Kr ø yer, 1856 [ZMUC POL – 1748, holotype, Kristianssund, Norway]. Observations on C. suspecta holotype. Specimen with histolysis, no branchial crown is preserved. Body length 11 mm, width 1.5 mm. Thoracic uncini with four rows of teeth above the main fang (Fig. 7 A); paleate chaetae with medium-sized mucro (Fig. 7 B); narrowly hooded bayonet chaeta (Fig. 7 D); anterior abdominal uncini with squared breast (Figs 7 E – G). Abdominal segments: 42. Spermatozoa with barrel-shaped nucleus; triangular, small acrosome and two small rounded mitochondria (Fig. 7 C).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBFFF9FFF7AFAD0FDCE9D68.taxon	discussion	Remarks. Kr ø yer (1956) described Chone suspecta on the basis of a single specimen with damaged radioles. Malmgren (1866: 404) referred C. suspecta to C. infundibuliformis. Cochrane (2000) stated that the etymology suggested his uncertainty as to whether the specimen was representative of a discrete taxon or a juvenile form of C. infundibuliformis. This study confirms that C. infundibuliformis Kr ø yer, 1856 is a synonym of C. suspecta Kr ø yer, 1856. The name infundibuliformis has priority over suspecta and has been in frequent use since its inception and is the name used by most museum curators (Art. 23.1, International Code of Zoological Nomenclature, 2000).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBAFF81FF7AFB30FEFE9D98.taxon	materials_examined	Material examined. Non-type material. Bogestr Ø mmen [ZMO] (1). Additional material. Chone duneri Malmgren, 1867 [ZMUC POL – 1755, Norway]. Chone infundibuliformis Kr ø yer, 1856 [ZMUC POL – 1749, paralectotype]. Description. Colour, body shape, and size. Body cream-coloured, no branchial crown. Trunk cylindrical. Body length 24 mm, width 0.4 mm. Tube unknown. Branchial lobes and branchial crown. Insertion of the branchial crown not exposed beyond collar (Fig. 8 B).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBAFF81FF7AFB30FEFE9D98.taxon	description	Peristomium. Anterior peristomial ring lobe (aprl) not exposed beyond collar, distally entire, triangular (Fig. 8 B). Posterior peristomial ring collar: antero-dorsal, ventral and lateral margins entire, ventral margin higher than dorsal (Fig. 8 D); longitudinal grooves on dorsal side of collar; entire length of mid-dorsal collar margins forms a broad gap (Fig. 8 B). Dorsal pockets well developed. Ventral shield of collar rectangular (not easily discernible). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 2: 1. Thorax. Chaetigers 2 to 8: notopodia – two irregular rows of elongate, narrowly hooded chaetae; one anterior row with narrow bayonet chaetae (Fig. 8 H); two posterior rows with symmetrical; paleate chaetae with a medium-sized mucro (Figs 8 E – G); neuropodia – two irregular rows of acicular uncini per torus, main fang surmounted by three rows of teeth (Fig. 8 J), second tooth enlarged, located in the midline, dentition covering one quarter of the main fang length. Glandular ridge on chaetiger 2: narrow. Abdomen. Abdominal segments: 51. Anterior abdominal uncini with the main fang surmounted by five rows of teeth equal in size (Fig. 8 K), occupying less than half the length of main fang, main fang not extending beyond breast, breast rectangular. Posterior abdominal uncini with four rows of teeth equal in size (Fig. 8 L). Very long, narrowly hooded chaetae (Fig. 8 I). Pygidium with triangular posterior margin (Fig. 8 D). Gametes. Male with spermatozoa in thorax and abdomen: acrosome elongate, triangular, nucleus barrelshaped, two rounded mitochondria (Fig. 8 C). Methyl green staining. Collar dorsal and lateral surfaces completely stained (Figs 8 B, D), collar ventral surface coloured only the base of the ventral collar shield (Fig. 8 A), other areas with small dark points. Thorax dorsally less stained than ventrally (Fig. 8 B).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFBAFF81FF7AFB30FEFE9D98.taxon	discussion	Remarks. Sars (1862) stated that the specimens resembled Chone paucibranchiata (Kr ø yer, 1856) to such an extent that he was long predisposed to assume that taxon; however, the number of radioles is not a character to differentiate species and the biannulate condition in thoracic segments is a common pattern in Chone. Chone kroyerii was referred to C. infundibuliformis by Malmgren (1866) and Fauvel (1927), but Cochrane (2000) recognized this taxon as valid. Chone kroyerii, C. duneri and C. infundibuliformis have anterior and posterior abdominal uncini with similar shape (not modified); C. kroyerii and C. infundibuliformis have the branchial lobes not exposed beyond collar (exposed in C. duneri); C. kroyerii has a broad collar gap (narrow in C. infundibuliformis), and the ventral margin of collar higher than C. infundibuliformis. Among species of Chone included in this revision, C. kroyerii is unique by having a rectangular ventral shield of collar (Table 2).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA4FF83FF7AFFD8FD899D10.taxon	materials_examined	Material examined. Type material. South Africa [SMNH 576, holotype], Cap. Coll. Wahlberg. Additional material. Chone aurantiaca (Johnson, 1901) [MCZ 1933, holotype]. Chone gracilis Moore, 1906 [USNM 5513, holotype]. Chone infundibuliformis Kr ø yer, 1856 [ZMUC POL – 1749, lectotype]. Chone magna (Moore, 1923) [USNM 17281, holotype]. Chone mollis Bush in Moore, 1904 [YPM 2793, holotype]. Chone picta (Verrill, 1885) [YPM 30000, topotypes].	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA4FF83FF7AFFD8FD899D10.taxon	description	Description. Colour, body shape, and size. Body cream coloured. Holotype with histolysis, fragmented in four pieces. Trunk cylindrical (Fig. 9 C). Body length 21 mm, width 1.5 mm. Tube unknown. Branchial lobes and branchial crown. Insertion of the branchial lobes not exposed beyond collar. Branchial crown length: 12 mm. Radioles: 9 pairs. Radioles with median pinnules two times longer than more proximal pinnules. Radiolar tips short (Fig. 9 D). Palmate membrane extends three quarters the length of branchial crown. Lateral flanges broad (Fig. 9 D). Dorsal lips two times longer than wide, erect, without a discernable longitudinal ridge. Dorsal pinnular appendages: 1 – 3 short pairs, united by a palmate membrane. Ventral lips rounded, as long as wide, about one quarter the length of the dorsal lips. Ventral radiolar appendages: 1 – 3 pairs, the inner one about three quarters of the branchial crown length, the remainder about one quarter the length of the branchial crown. Peristomium. Anterior peristomial ring lobe not exposed beyond collar, distally entire. Posterior peristomial ring collar: antero-dorsal margin deeply incised (perhaps due to histolysis) (Fig. 9 A); lateral and ventral margins entire (Figs 9 B – C), ventral slightly higher than dorsal (Figs 9 B – C); entire length of mid-dorsal collar margins forms a broad gap. Ventral shield of collar swollen, horseshoe-shaped, two times wider than long (Fig. 9 B). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 1.5: 1. Thorax. Elongate, narrowly hooded chaetae (Fig. 9 F); narrowly hooded bayonet chaetae, two posterior rows with symmetrical, paleate chaetae with medium-sized mucro (Figs 9 G – I). Thoracic uncini (Fig. 9 J) with five rows of teeth over the main fang, second tooth enlarged and located in midline, dentition covering one quarter of the main fang length. Narrow glandular ridge on chaetiger 2. Abdomen. Abdominal segments: 41. Elongate, narrowly hooded chaetae, upper row chaetae half as long as lower row ones (Fig. 9 M); anterior abdominal uncini with the main fang surmounted by four rows of equal in size teeth, occupying one half of the main fang length, main fang not extending beyond breast, breast rectangular (Fig. 9 K). Posterior segments: 1 – 2 very elongate, narrowly hooded chaetae, 25 % longer than in anterior segments; uncini similar to those in anterior abdominal segments, but smaller (Fig. 9 L). Pygidium with rounded posterior margin (Fig. 9 E). Gametes. Holotype female with oocytes in all thoracic and anterior abdominal segments, diameter undeterminable. Methyl green staining. Anterior end of ventral collar shield not coloured. Body coloured uniformly dorsal and ventrally.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA4FF83FF7AFFD8FD899D10.taxon	discussion	Remarks. Parachonia Kinberg, 1867, was regarded as junior synonym of Chone by Johansson (1927). The original description of Chone letterstedti (Kinberg) is brief. Thus, it had to be redescribed to be properly compared with the remaining species in the genus. This redescription points out that in C. letterstedti: a) radiolar tips are short; b) radiolar flanges broad; c) anterior dorsal margins of collar deeply incised; d) entire length of mid-dorsal collar margins forms a broad gap; and e) abdominal uncini with similar shape throughout. Chone letterstedti, C. infundibuliformis, C. aurantiaca, C. duneri, C. gracilis, C. magna, C. mollis and C. picta have the anterior and posterior abdominal uncini with similar shape: a well developed main fang surmounting by few smaller teeth irregularly arranged, overlapping, not as a uniform set of rows, that occupy less than a half of the main fang lengths; main fang not extending beyond breast, and with rectangular well developed breast, handles absent. However, C. letterstedti is unique among these species because it has the anterodorsal margin of collar deeply incised.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA6FF82FF7AFFA0FEB19FB8.taxon	materials_examined	Material examined. Non-type material. Arctic Ocean [LACM – AHF], Beaufort Sea, Northwest of Cape Halkett, Alaska, Coll. Andrew Carey: 948 – 04 (3); 835 – 04 (141); 836 – 03 (145). [ZIRAS 38178] Franz-Joseph Land, September 29, 1970, 28 – 30 m, pebble and sand (2).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA6FF82FF7AFFA0FEB19FB8.taxon	diagnosis	Diagnosis. Body elongated, cylindrical. Body length 18 mm. Branchial crown length 4 mm. Branchial lobes short. Radiolar tips extra long. Narrow flanges. Anterior peristomial ring lobe exposed beyond collar (aprl), bilobed (Figs 10 B – C). Ventral collar margin higher than dorsal one, bilobed (Figs 10 B – C). Entire length of mid-dorsal collar margins forms a very broad gap (Fig. 10 A). Dorsal pockets well developed (Fig. 10 A). Peristomial eyes present (pe) (Figs 10 B – C). Paleate chaetae with long mucro (Figs 10 D – E); thoracic uncini with four rows of teeth (Fig. 10 F); thoracic narrowly hooded chaetae (Figs 10 K – L). Glandular ridge on chaetiger 2 narrow. Ventral thoracic shields well developed. Abdominal segments: 26. Abdominal chaetae narrowly hooded (Figs 10 M – N); posterior abdominal uncini modified with six rows of teeth (Figs. 10 H – J). Pygidium with triangular posterior margin. Methyl green staining. Dorsally there is no colour, only lateral spots in the collar, laterally, the following segments have glandular spots (Fig. 10 A). Ventrally: collar segment stained uniformly, except the anterior margin, and the area where the otoliths occurs (Figs 10 B – C).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA6FF82FF7AFFA0FEB19FB8.taxon	description	Gametes. Spermatozoa with barrel-shaped nucleus, triangular, short acrosome, two small, rounded mitochondria (Fig. 10 G).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA6FF82FF7AFFA0FEB19FB8.taxon	discussion	Remarks. Cochrane (2000) stated that the illustration of the anterior end of C. murmanica, depicted in Lukasch (1910) indeed closely resembles the drawing of C. paucibranchiata by Kr ø yer. Both taxa have three pairs of radioles and a characteristically pronounced dorsal gap in the collar. Chone paucibranchiata has been regarded as a junior synonym of Chone infundibuliformis Kr ø yer, 1856 after Malmgren (1866), but Banse (1972) stated that C. paucibranchiata has well developed ventral glandular shields (absent in C. infundibuliformis); and that its palmate membrane extends at least one-third of the branchial crown length (two thirds in C. infundibuliformis). If C. paucibranchiata is regarded as a valid species, it would have priority over C. murmanica, but examination of topotype material is necessary in order to confirm the synonym. Among species of Chone included in this revision, C. murmanica is unique by having a ventral shield of collar in trapezoidshaped (Table 2).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA7FF84FF7AFDFDFCF99E78.taxon	materials_examined	Material examined. Non-type material. Scotland [NMW. Z], Calback Ness and Little Roe, Sullom Voe, Shetland Isles: 1997.078.0 0 62, Sta. B 49, D, medium to coarse sand, 20 m, Coll. IOE (2). North Sea [ZMH], P – 13285, AD 723, Sta. 2 (9). Additional material. Chone duneri Malmgren, 1867 [ZMUC POL – 1755, Norway]. Chone infundibuliformis Kr ø yer, 1856 [ZMUC POL – 1749, lectotype].	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA7FF84FF7AFDFDFCF99E78.taxon	description	Description. Colour, body shape, and size. Body cream coloured. Trunk cylindrical. Body length 3.5 – 10 mm, width 0.5 – 1.5 mm. Tubes unknown. Branchial lobes and branchial crown. Insertion of the branchial lobes not exposed beyond collar (Fig. 11 C). Branchial crown length: 2.5 mm. Radioles: 6 pairs. Median pinnules three times longer than more proximal pinnules. Radiolar tips triangular, medium-sized. Palmate membrane extends three quarters the length of the branchial crown. Lateral flanges broad (Fig. 11 A). Dorsal lips rounded, without mid-rib. Ventral lips rounded, about one quarter of the dorsal lips length. Ventral radiolar appendages: one pair, about half the length of the branchial crown. Peristomium. Anterior peristomial ring lobe exposed beyond collar, distally bilobed. Posterior peristomial ring collar: ventral, dorsal and lateral margins entire, ventral slightly higher than dorsal (Figs 11 B – C); entire length of mid-dorsal collar margins forms a narrow gap. Dorsal pockets well developed. Ventral collar shield swollen, horseshoe-shaped, two times wider than long (Fig. 11 B). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 1.5: 1. Thorax. Elongate, narrowly hooded chaetae; narrowly hooded bayonet chaetae, two posterior rows with symmetrical, paleate chaetae with long mucro (Fig. 11 F). Uncini with the main fang surmounted by three rows of equal sized teeth, occupying a half the length of the main fang (Fig. 11 G). Narrow glandular ridge on chaetiger 2. Abdomen. Abdominal segments: 17. Elongate, narrowly hooded chaetae (Fig. 11 H), upper row chaetae half as long as lower row ones; uncini with the main fang surmounted by three rows of equal in size teeth, occupying one half of the main fang length, main fang not extending beyond breast, breast rectangular (Fig. 11 D). Posterior segments: 1 – 2 very elongate, narrowly hooded chaetae, 25 % longer than in anterior segments; uncini modified (Fig. 11 E). Pygidium with rounded posterior margin (Fig. 11 A). Gametes. Oocytes in thorax and abdomen. Methyl green staining. Only the basal half of the ventral shield of collar is coloured (Figs 11 A – B). Body coloured uniformly ventrally (Fig. 11 A), dorsally is not coloured (Fig. 11 C), pygidium is not stained.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA7FF84FF7AFDFDFCF99E78.taxon	discussion	Remarks. Chone normani have broad flanges and triangular radiolar tips of medium-sized; and abdomen shorter than thorax. For comparison, C. infundibuliformis has broad flanges but radiolar tips very short and rounded; and abdomen longer than thorax. Chone normani differ of C. duneri by having flanges very broad (narrow in C. duneri), radiolar tips medium-sized (extra long in C. duneri), base of the branchial lobes not exposed beyond collar (exposed in C. duneri) and posterior abdominal uncini modified (not modified in C. duneri). Both species have the anterior peristomial ring lobe exposed beyond collar, bilobed. Chone normani has not been recorded since their description; however, the species could be well represented in shallow waters. Probably, specimens of C. normani are mixed in samples previously identified as C. infundibuliformis, C. duneri or C. fauveli. In this study I propose to use the shape of the radiolar tip as first step to identify C. normani (the McIntosh’s figure is useful: Pl. 3, Fig. 14), followed by other features of the anterior and posterior peristomial ring collar and uncini.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA1FF87FF7AFCB8FB7F9E20.taxon	materials_examined	Material examined. Type material. Laptev Sea [ZIRAS 47434, syntype], RV Sadko, Sta. 9, 77 ° 25.5 ’ N, 115 ° 45.2 ’ E, 62 m, sandy mud, Coll. G. P. Gorbunov. Additional material. Chone murmanica Lukasch, 1910 [ZIRAS 38178, Franz-Joseph Land].	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA1FF87FF7AFCB8FB7F9E20.taxon	diagnosis	Diagnosis. Tube organic, transparent, more or less incrusted by sand and mud. Anterior peristomial ring (apr) exposed beyond collar dorsally (Fig. 12 A). Ventral margin of collar higher than dorsal (Fig. 12 B). Lateral margin of collar with a median depression (Fig. 12 B). Anterior peristomial ring lobe not exposed beyond collar. Peristomial eyespots present. Glandular ridge on chaetiger 2 narrow. Thoracic segments biannulate. Ventral thoracic shields well developed (Fig. 12 B).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA1FF87FF7AFCB8FB7F9E20.taxon	discussion	Remarks. According to Annenkova (1952), Chone murmanica oculata and C. murmanica have similar shape of the collar, branchiae, chaetae and tube, but they differ because C. m. oculata has eyespots on peristomium and despite being bigger, it has less chaetigers. However, C. murmanica has peristomial eyes (see diagnosis of C. murmanica above), and re-examination of type material of C. m. oculata shows additional differences: C. m. oculata has the lateral margin of collar with a median depression (absent in C. murmanica); the anterior peristomail ring is exposed dorsally (not exposed in C. murmanica); anterior peristomial ring lobe not exposed beyond collar (bilobed, exposed beyond collar in C. murmanica); and the entire length of middorsal collar margins forms a narrow gap (very prominent margins and broad gap in C. murmanica). Thus, C. m. oculata deserves specific status although examination of more materials from the type locality is necessary in order to describe characters from chaetae and uncini, and branchial crown appendages.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA2FF86FF7AFC50FAE89D40.taxon	materials_examined	Material examined. Type material. Callao [ZMH P – 15209, syntype], Peru, Coll. Noodt, 29.5.56. Additional material. Chone acustica (Claparède, 1870) [MNCN, neotype]. Chone albocincta Banse, 1972 [LACM – AHF POLY 0 455, paratypes]. Chone gambiae Tovar-Hernández et al. (2007) [MNCN 16.01 / 7366, holotype]. Chone perkinsi Tovar-Hernández, 2005 [ECOSUR 0 0 53, paratype].	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA2FF86FF7AFC50FAE89D40.taxon	description	Description. Colour, body shape, and size. Syntype complete. Body cream-coloured. Trunk cylindrical. Body length 11 mm, width 2 mm. Tubes unknown. Branchial lobes and branchial crown. Insertion of the branchial crown exposed beyond collar (Fig. 13 B). Branchial crown length 2 mm. Radioles: 6 pairs. Median pinnules longer than more proximal pinnules. Radiolar tips short (Fig. 13 A). Palmate membrane extends about three quarters the length of the branchial crown. Lateral flanges broad. Dorsal lips elongate. Ventral lips rounded, small. Ventral radiolar appendages: one pair, about one quarter the length of the branchial crown. Peristomium. Anterior peristomial ring lobe not exposed beyond collar, distally entire, triangular. Posterior peristomial ring collar: antero-dorsal (Fig. 13 B), ventral (Fig. 13 C) and lateral margins (Fig. 13 A) entire, ventral margin slightly higher than dorsal (Fig. 13 A); the entire length of mid-dorsal collar margins forms a narrow gap (Fig. 13 B). Dorsal pockets well developed. Ventral shield of collar horseshoe-shaped, swollen. Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 2: 1. Thorax. Chaetigers 2 to 8: Notopodia: superior group with two irregular rows of elongate narrowly hooded chaetae; inferior group with one anterior row of bayonet chaetae; two posterior rows with paleate chaetae with short mucro. Neuropodia: acicular uncini distributed as a regular row, second tooth enlarged, located offset the midline, dentition covering three quarters the length of the main fang. Glandular ridge on chaetiger 2 broad laterally. Abdomen. Abdominal segments: 26. Anterior segments: two transverse rows of elongate, narrowly hooded chaetae, upper row chaetae half as long as lower row ones; uncini with second tooth enlarged, occupying a half of the main fang length, main fang not extending beyond breast. Posterior segments: very elongate, narrowly hooded chaetae, 25 % longer than those of anterior segments; uncini modified. Pygidium with rounded posterior margin (Fig. 13 D). Gametes. Syntype inmature. Methyl green staining. Body stains uniformly laterally (Fig. 13 A) and ventrally (Fig. 13 C), dorsally only the collar segment is coloured (Fig. 13 B).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA2FF86FF7AFC50FAE89D40.taxon	discussion	Remarks. Chone paracincta has the following distinguisable features: glandular ridge in chaetiger 2 broad laterally, branchial lobes exposed beyond collar dorsally, and dorsal pockets well developed. Other species with glandular ridge broad laterally is C. gambiae; however, it has long radiolar tips (short in C. paracincta); anterior peristomial ring lobe exposed, bilobed (not exposed, triangular in C. paracincta) and glandular ridge on segment 9 (absent in C. paracincta). In C. acustica and C. perkinsi the glandular ridge is broad dorsally, and in C. albocincta the ridge is broad ventrally. Among species of Chone included in this revision, C. paracincta is unique by having a glandular ridge on chaetiger 2 broad laterally (Table 2).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFACFF88FF7AFEB0FE4A9A68.taxon	materials_examined	Material examined. Type material. off South Chile [ZMH P – 15202, holotype], Exp. Mar Chile I, March 1960. Additional material. Chone bimaculata Banse and Nichols, 1968 [USNM 36280, paratypes]. Chone duneri Malmgren, 1867 [ZMUC POL – 1755, topotypes]. Chone dunerificta Tovar-Hernández et al. (2007) [MNCN 16.01 / 7369, holotype].	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFACFF88FF7AFEB0FE4A9A68.taxon	description	Description. Colour, body shape, and size. Holotype complete. Body cream-coloured. Trunk cylindrical. Body length 17 mm, width 2 mm. Tube unknown. Branchial lobes and branchial crown. Insertion of the branchial crown not exposed beyond collar (Figs 14 A – C). Branchial crown length: 19 mm. Radioles: 9 pairs. Median pinnules longer than more proximal pinnules. Radiolar tips extra long (7 mm) (Figs 14 A, G). Palmate membrane extends about half the length of the branchial crown. Lateral flanges broad (Fig. 14 G). Dorsal lips broadly rounded, as long as wide, without midrib. Dorsal pinnular appendages: two short pairs united by a membrane. Ventral lips rounded, as long as wide, about half of the dorsal lips length. Ventral radiolar appendages: three pairs, the first about one quarter the length of the branchial crown, the rest about a half of the branchial crown. Peristomium. Anterior peristomial ring lobe not exposed beyond collar (Fig. 14 B), distally entire, triangular. Posterior peristomial ring collar: antero-dorsal, ventral and lateral margins entire, ventral margin slightly higher than dorsal (Figs 14 A – C); the entire length of mid-dorsal collar margins is overlapped (Fig. 14 C). Dorsal pockets not developed. Ventral shield of collar sunglasses-shaped, swollen (Fig. 14 B). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 2: 1. Thorax. Chaetiger 1: two groups of elongate, narrowly hooded chaetae. Chaetigers 2 to 8: Notopodia: superior group with two irregular rows of elongate narrowly hooded chaetae; inferior group with one anterior row of bayonet chaetae; two posterior rows with paleate chaetae with short mucro (Fig. 14 D). Neuropodia: acicular uncini distributed as a regular row, second tooth enlarged (not illustrated), located in the midline, dentition covering one quarter the length of the main fang (Fig. 14 E). Glandular ridge on chaetiger 2 narrow. Abdomen. Abdominal segments: 35. Anterior segments: two transverse rows of elongate, narrowly hooded chaetae, upper row chaetae half as long as lower row ones; uncini with the main fang surmounted by four rows of teeth in frontal view, occupying less than half of the main fang length, main fang not extending beyond breast (Fig. 14 H). Posterior segments: very elongate, narrowly hooded chaetae, 25 % longer than those of anterior segments; uncini similar to those in anterior abdomen, but smaller (Fig. 14 I). Pygidium with rounded posterior margin (Fig. 14 A). Gametes. Spermatozoa with barrel-shaped nucleus, mushroom-shaped acrosome and two rounded mitochondria (Fig. 14 F). Methyl green staining. Ventrally body stains uniformly, except for the basal half of the collar that is less coloured (Figs 14 B); dorsally body stains uniformly, except for the faecal groove (Fig. 14 C).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFACFF88FF7AFEB0FE4A9A68.taxon	discussion	Remarks. Chone rosea is unique by having a long collar; the ventral shield of collar is remarkable because it is sun glasses-shaped (Table 2); the mid-dorsal collar margins overlap and extremely long radiolar tips. Other species with extra long radiolar tips (but shorter than C. rosea) are C. duneri, C. dunerificta and C. bimaculata; but the anterior peristomial ring lobe is triangular, not exposed beyond collar in C. rosea (bilobed, exposed in all others).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFADFF8AFF7AF888FB8099B0.taxon	materials_examined	Non-type material. Aleutian Islands [LACM – AHF] Aleutian Cruise, Sta. 86 a, 64 – 30 N, 169 – 50 W, August 13, 1949, Dredge, 23, Like Beach sand (7). Japan [PC – ZL] Katsuura, Boso Peh, subtidal, 1994, May (1). Additional material. Chone quebecensis Tovar-Hernández (2007) [CMN, holotype].	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFADFF8AFF7AF888FB8099B0.taxon	description	Description. Colour, body shape, and size. Holotype complete. Body cream coloured, base of the branchial crown dark brown. Trunk cylindrical. Body length 20 mm (17 – 29), width 1.5 mm (1.7 – 3). Tubes unknown. Branchial lobes and branchial crown. Insertion of the branchial lobes exposed beyond collar (Fig. 15 A). Branchial crown length 7 mm (5 – 7). Radioles: 11 pairs (11 – 13). Anterior margin of the base of the branchial crown festooned (Figs 15 A – C). Radiolar tips long. Palmate membrane extends three quarters the length of the branchial crown. Lateral flanges broad. Dorsal lips broadly rounded, as long as wide, without mid-rib. Dorsal pinnular appendages: 6 pairs (3 – 6). Ventral lips short, rounded, one quarter of the dorsal lips length. Ventral radiolar appendages: 6 pairs (4 – 6). Peristomium. Anterior peristomial ring lobe (aprl) exposed beyond collar, bilobed (Fig. 15 B). Posterior peristomial ring collar: antero-dorsal margin swollen; lateral and ventral margins entire (Figs 15 A – B, D), ventral higher than dorsal (Fig. 15 D); entire length of mid-dorsal collar margins forms a broad gap, faecal groove broad (Fig. 15 C). Dorsal pockets well developed. Ventral shield of collar swollen, horseshoe-shaped, twice wider than long (Fig. 15 B). Collar with rectangular, lateral, swollen spongy cushions (sc) (Figs 15 A – B, D). Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 2: 1. Thorax. Chaetiger 1: two groups of elongate, narrowly hooded chaetae. Chaetigers 2 to 8: Notopodia: two irregular rows of elongate, narrowly hooded chaetae; one row with bayonet chaetae (Fig. 15 M), two posterior rows with symmetrical chaetae; paleate chaetae with medium-sized mucro (Figs 15 I – K). Neuropodia: two rows of acicular uncini with three rows of teeth over the main fang (Fig. 15 L), second tooth enlarged, located in the midline, dentition covering one quarter of the main fang length. Narrow glandular ridge on chaetiger 2. Abdomen. Abdominal segments 48 (44 – 48). Anterior segments: two transverse rows of elongate, narrowly hooded chaetae, upper row chaetae half as long as lower row ones; uncini with the main fang surmounted by three rows of equal in size teeth, occupying one half of the main fang length, main fang not extending beyond breast, breast rectangular (Fig. 15 F). Posterior segments: 1 – 2 very elongate, narrowly hooded chaetae, 25 % longer than in anterior segments; uncini similar to those in anterior abdominal segments, but smaller (Figs 15 G – H). Glandular, longitudinal band (gb) on posterior abdomen (Fig. 15 E). Pygidium with triangular posterior margin (Fig. 15 E). Gametes. Not seen. Methyl green staining. Thorax and anterior abdomen stains uniformly, dorsal and ventrally (Figs 15 A – D). The posterior abdomen stains less than anterior abdomen (Fig. 15 E). The lateral spongy cushions of the collar are dark. The collar segment is darker on lateral sides; the anterior half of the ventral collar shield is unstained (Figs 15 A – D).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFADFF8AFF7AF888FB8099B0.taxon	discussion	Remarks. Chone sp. Aleutian Islands and C. quebecensis Tovar-Hernández (2007) have the ventral margin of anterior peristomial ring lobe distally bilobed; and a ventral, longitudinal glandular band on the posterior part of abdomen. However, C. sp. Aleutian Islands is easily distinguished from C. quebecensis by lacking the dorsal, oval glandular shields on peristomium (present in C. quebecensis); glandular ridge on chaetiger 2 narrow (broad ventrally in C. quebecensis); paleate chaetae with medium-sized mucro (long in C. quebecensis); lateral flanges broad (narrow in C. quebecensis), and posterior abdominal uncini not modified (modified in C. quebecensis). Chone sp. Aleutian Islands has lateral spongy cushions on the collar segment; this is due to a massive glandular epithelium. In C. sp. Aleutian Islands, the base of the branchial crown is very rigid and brown-coloured; and the dorsal antero-lateral margin of collar forms a broad gap.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFAFFF8CFF7AFBC0FAC09A10.taxon	materials_examined	Material examined. Non-type material. British Virgin Islands [LACM – AHF] AF 00 – 05 White Bay, 2 finger reefs closest to beach house, Coll. K. Fitzhugh, July 4, 2000, 40 m offshore, scraping of sand and sparse filamentous algae (Ceramium, Polysiphonia) on flat coral boulder, 1 m (1). AF 00 – 12 Long Point, 70 m SE of dock, above crest of reef, more protected area in a furrow on the bottom, covered with fine algae growing on small pebbles, Coll. T. Zimmerman and G. Hendler, hand, July 5, 2000, 18 ° 29.15 ’ N, 64 ° 34.97 ’ W, 0.6 – 0.8 m (1). Mexican Caribbean [ECOSUR] Bajo Pepito, Isla Mujeres, Quintana Roo, Mexico; in Stypopodium zonata, Coll. M. Díaz, February 1997 (2); February 5, 1997 (3); April 1997 (9); in Sargassum vulgaris, May 1997 (1); July 1997 (4). Xcayal, lighthouse, B 110, November 4, 1990 (2). [LACM – AHF] LH 01 – 665, Isla Contoy, South point, West side, green felt on coral rubble, rock, 0.33 m, Coll. L. Harris, March 0 2, 2001 (2). Bahamas [LACM – AHF] LH 03 – 231, Sta. 45, Exuma Cays, Basil Minn’s Cave, marine entrance pool, algae and sediment scooped up from bottom, strong H 2 S odor from black silt, January 11, 2003 (1). LH 03 – 157, Sta. 31, Exuma Cays, Stocking Cay, 6 m south of entrance to Mystery Cave, Coll. T. Haney, January 9, 2003, 2 m (2). Additional material. Chone americana Day, 1973 [USNM 43137, paratype]. Chone filicaudata Southern, 1914 [BMNH 1914.12.12.25, syntype].	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFAFFF8CFF7AFBC0FAC09A10.taxon	description	Description. Colour, body shape, and size. Body cream coloured. Trunk cylindrical, posterior abdomen slightly depressed dorso-ventrally. Body length 3 – 6 mm, width 0.5 – 1.5 mm. Tubes constructed with fine sand. Branchial lobes and branchial crown. Insertion of the branchial lobes exposed beyond collar. Branchial crown length 1.2 – 2.3 mm. Radioles: 5 – 6 pairs. All pinnules long. Radiolar tips medium-sized (Fig. 16 A). Palmate membrane extends a half the length of the branchial crown (Fig. 16 A). Lateral flanges broad. Dorsal lips three times longer than wide, erect, without a discernable longitudinal ridge. Ventral lips broad, as long as wide, about one half of the dorsal lips length. Ventral radiolar appendages: two pairs, the inner one about one quarter the length of the branchial crown length (Fig. 16 A), others about one half of the branchial crown length. Peristomium. Anterior peristomial ring lobe exposed beyond collar, distally entire, triangular (Fig. 16 A). Antero-dorsal, lateral, and ventral margins of posterior peristomial ring collar entire, ventral slightly higher than dorsal (Figs 16 A); entire length of mid-dorsal collar margins forms a narrow gap, dorsal pockets well developed. Ventral collar shield swollen, horseshoe-shaped, two times wider than long. Ratio of posterior peristomial ring collar length versus chaetiger 2 length, in lateral view: 1.5: 1. Otoliths in peristomium. Thorax. Elongate, narrowly hooded chaetae; narrowly hooded bayonet chaetae; symmetrical; paleate chaetae with medium-length mucro. One row of acicular uncini, second tooth enlarged, located offset the midline, dentition covering three quarters of the main fang length (Figs 16 C – D). Glandular ridge on chaetiger 2: narrow. Abdomen. Abdominal segments: 23. Anterior segments: 3 – 4 elongate, narrowly hooded chaetae, upper row chaetae half as long as lower row ones; uncini with the main fang surmounted by four irregular rows of unequal in size teeth (basal median tooth of basal row enlarged), occupying one half of the main fang length (Fig. 16 E), older (dorsal most) uncini smaller than younger ones (ventral most), main fang not extending beyond breast, breast rectangular. Posterior segments: 1 – 2 very long, narrowly hooded chaetae (Figs 16 B, F), 25 % longer than in anterior segments; modified uncini with the main fang surmounted by eight regular rows of teeth equal in size, occupying three quarters of the main fang length (Fig. 16 G), older (dorsal most) uncini smaller than younger uncini (ventral most), main fang not extending beyond breast, breast rectangular. Pygidium with triangular posterior margin, and short cirrus (Fig. 13 B). Gametes. Females with oocytes (oo) in anterior thoracic chaetigers, diameter 0.75 – 0.15 mm. Methyl green staining. Anterior end of the ventral collar shield not coloured, posterior end dark. Body uniformly coloured dorsal and ventrally.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFAFFF8CFF7AFBC0FAC09A10.taxon	discussion	Remarks. Chone americana and C. sp. British Virgin Islands are unique among Western Atlantic Chone species by having a pygidial cirrus: C. americana differs from C. sp. British Virgin Islands because it has long radiolar tips (short in C. sp. British Virgin Islands), anterior peristomial ring lobe and branchial lobes not exposed above collar (both exposed in C. sp. British Virgin Islands), and sperm with barrel-shaped nucleus (spherical in C. sp. British Virgin Islands). Another species with pygidial cirrus is C. filicaudata from Ireland, but this species have the anterior peristomial ring lobe incised, while it is entire in C. americana. The anterior abdominal uncini in Chone sp. British Virgin Islands and C. americana have four irregular rows of unequal in size teeth (basal median tooth of basal row enlarged), occupying one half of the main fang length.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA9FF8EFF7AF8F5FB629ED8.taxon	materials_examined	Material examined. Type material. Eniwetok Atoll [USNM 38406, holotype], Marshall Islands, lagoon near Parry Island, 0.45 m, Coll. D. Reish.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA9FF8EFF7AF8F5FB629ED8.taxon	description	Description. Colour, body shape, and size. Trunk cylindrical, posterior abdomen depressed. Holotype juvenile (Fig. 17 A). Body length 4 mm, width 0.3 mm. Branchial lobes and branchial crown. Insertion of the branchial lobes exposed beyond collar (Fig. 17 B). Radioles: 5 pairs. Radiolar tips long (Figs 17 C – E). Ratio of the palmate membrane length versus branchial crown length: 0.25: 1. Lateral flanges narrow. Dorsal lips and ventral lips not examined. Peristomium. Anterior peristomial ring lobe not exposed beyond collar (Fig. 17 B). Posterior peristomial ring collar: dorsal and lateral margins of collar entire, ventral with a short incision, ventral margin higher than dorsal (Figs 17 A – B); entire length of mid-dorsal collar margins forms a narrow gap. Ratio of posterior peristomial ring collar length versus chaetiger 1 length, in ventral view: 1: 1. Two peristomial eyes (Fig. 17 B). Thorax. Elongate, narrowly hooded chaeta; two rows with three short, broadly hooded chaetae (Figs 17 H – I). Six acicular uncini per torus, with teeth of equal size above the main fang. Glandular ridges on chaetigers 2 and 5: glandular ridge of chaetiger 2 narrow, interrupted dorsal and ventrally; glandular ridge of chaetiger 5 narrow, irregular. Ventral shields weakly developed. Abdomen. Abdominal segments: 14. Long, narrowly hooded chaetae; 5 – 8 modified abdominal uncini per torus on anterior and posterior abdomen (Fig. 17 F). Posterior end strongly depressed along the last six segments, with an anterior margin. Pygidium with rounded posterior margin (Fig. 17 G). Methyl green staining. Ventral shields of thorax with large glands (Fig. 17 A). Dorsally, body is not coloured, laterally only narrow bands are coloured.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFA9FF8EFF7AF8F5FB629ED8.taxon	discussion	Remarks. Euchone eniwetokensis was described as having six chaetigers in the anal depression. Banse (1970) transferred the species to Chone because of the apparent lack of an anal depression; however, E. eniwetokensis has the posterior segments depressed (Fig. 17 A), short, broadly hooded thoracic notochaetae, which are characteristic for Euchone (Figs 17 H – I), and lacks paleate chaetae. Then, herein, the species is returned to Euchone. Euchone eniwetokensis and E. papillosa (Sars) have six segments in the anal depression, but they differ by the total number of segments, and by the number and length of radioles. Banse (1970) recognized that the full complement of chaetigers forming the anal depression is not present in juveniles. Bick and Randel (2005) confirmed this, such that no anal depression was found on the smallest specimens of E. analis, and smaller specimens bear only an enlarged faecal groove without lateral wings. Moreover, Bick and Randel (2005) stated that identifying small specimens of Euchone is difficult without information about the ontogenetic variation of characters (as in juveniles of E. analis). The same authors have also reported a great intraspecific variability in nearly all diagnostic characters of E. analis. The holotype of E. eniwetokensis is a juvenile; the glandular ridge on chaetiger 2 is inconspicuous (as in juveniles of E. analis).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFABFF8EFF7AFD18FE75999E.taxon	materials_examined	Material examined. Non-type material. Arctic Ocean [LACM – AHF] Beaufort Sea, Northwest of Cape Halkett, Alaska, Coll. Andrew Carey: SMG – 1773 (43), SMG – 1774 (36), SMG – 1796 (71).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFABFF8EFF7AFD18FE75999E.taxon	discussion	Remarks. Chone perseyi was described from Novaya Zemlya (Arctic Ocean), type material is missing, but according to the original description by Zenkewitsch (1925) and additional materials from the Arctic Ocean, in this study the species is transferred to Euchone due to the fact that the species have corresponding diagnostic features: 1) 5 pairs of radioles; 2) long paired pinnules; 3) radiolar skeleton with two rows of cells; 4) palmate membrane and flanges present; 5) ventral lips present, small, rounded; 6) dorsal lips elongate; 7) one pair of ventral radiolar appendages; 8) anterior peristomial ring lobe bilobed, exposed beyond collar; 9) glandular ridge on chaetiger 2 narrow; 10) short, broadly hooded thoracic notochaetae; 11) bayonet chaetae; 12) thoracic uncini acicular with teeth of unequal sizes; 13) abdominal uncini from the anal depression as rasp-shaped plates; without main fang, breast poorly developed, handles absent; 14) posterior depression without lateral flanges.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFABFFB1FF7AF825FE759D38.taxon	materials_examined	Material examined. Type material. Flor ø, Sogn og Fjordane [ZMO, C 2013, 4 syntypes]. Non-type material. Gullmaren [ZMB 5723], Coll. Grube, Malmgren (1).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFABFFB1FF7AF825FE759D38.taxon	diagnosis	Diagnosis. Anal depression with lateral wings; vascular peristomial loops; ventral thoracic shields; eigth pairs of ventral radiolar appendages; dorsal pinnular appendages absent; dorsal lips elongate, collar ventral incised.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFFABFFB1FF7AF825FE759D38.taxon	discussion	Remarks. Chone rubrocincta Sars, 1862 was transferred to Euchone by Malmgren (1866). Euchone analis and E. rubrocincta have vascular loops. According to Tovar-Hernández (2007), E. analis and E. rubrocincta have vascular loops, which are circular cameras situated dorso-laterally in the peristomium; inside each camera there is an S- or C-shaped vessel; their structure and function has not been studied yet, but they might be irrigated from the central blood vessel. The vascular loops have been recorded also in Fabrisabella (Fitzhugh, 1989).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFF94FFB1FF7AFFB5FA589916.taxon	materials_examined	Material examined. Non-type material. Scotland [NMW. Z] Brae Oilfield: 1997.057.0 0 73, Sta. 95, 9 B, fine to medium sand, 110 m, Coll. ERT (4); 1997.057.0 0 75, Sta. 95, 20, fine to medium sand 110 m, Coll. ERT (2).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFF94FFB1FF7AFFB5FA589916.taxon	diagnosis	Diagnosis. Insertion of the branchial lobes not exposed beyond collar. Base of the branchial lobes prominent. Palmate membrane absent. Dorsal pinnular appendages absent. Ventral radiolar appendages: 4 pairs. Anterior peristomial ring lobe not exposed beyond collar, distally entire. Posterior peristomial ring collar: antero-dorsal margin deeply incised, forming two well developed dorsal pockets; two dorsal vascular loops; entire length of mid-dorsal collar margins forms a broad gap; anterior margin of collar crenulated. Thorax with elongate, narrowly hooded chaetae; bayonet chaetae; paleate chaetae with medium-sized mucro; acicular uncini with the main fang surmounted by three rows of teeth equal in size, occupying half the length of main fang; hood present. Glandular ridge on chaetiger 2: narrow. Abdomen with elongate, narrowly hooded chaetae; uncini with the main fang surmounted by teeth equal in size, breast reduced to narrow swelling, handles long.	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
03CE472CFF94FFB1FF7AFFB5FA589916.taxon	discussion	Remarks. Chone reayi has to be transferred to the genus Jasmineira due to the fact that the species has diagnostic features for Jasmineira: 1) palmate membrane absent; 2) dorsal pinnular appendages absent; 3) dorsal pockets well-developed; 4) vascular loops in the peristomium; and 5) abdominal uncini with main fang covered by equal-sized teeth, breast reduced to narrow swelling, and handles long. McIntosh (1916) illustred the abdominal uncini (Pl. 2, Fig. 10; Pl. 3, Fig. 7) and the base of the branchial crown (Pl. 4, Figs 12 – 13), both sui generis of Jasmineira. Jasmineira is often confused with Fabrisabella Hartman, 1969, because both have abdominal uncini with a reduced narrow breast and long handle; however, they differ in that Fabrisabella lacks dorsal radiolar appendages and bayonet chaetae; both features present in Jasmineira (Fitzhugh, 1989).	en	Tovar-Hernández, María Ana (2007): On some species of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from world-wide localities. Zootaxa 1518: 31-68, DOI: 10.5281/zenodo.177378
