taxonID	type	description	language	source
537900B608D3AEF28DC345138F0EE4C5.taxon	diagnosis	Diagnosis. Body long and slender. Two longitudinal rows of macrotubercles, one pair per segment, absent on first chaetiger. Macrotubercles sessile, with terminal papillae. Two longitudinal rows of microtubercles, one pair per segment, running parallel between macrotubercles. Additionally, papillae arranged in 4 - 5 transverse rows on dorsum and ventrum. Prostomial and peristomial appendages short, spherical or digitiform. Parapodia from chaetiger 2 with both simple and compound chaetae; hooks on first chaetiger absent or present.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
7C05E9AF6997A802356DDF909EE7DC43.taxon	materials_examined	Material examined. Holotype: LACM- AHF POLY TYPE 942, off Dutch Guayana Surinam, 07 ° 52 ' N, 54 ° 31.5 ' W, 520 - 550 m, coll. Woods Hole Oceanographic Institution, 25 Apr 1963. Paratype: same collection information LACM- AHF POLY TYPE 943 (1 ind.).	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
7C05E9AF6997A802356DDF909EE7DC43.taxon	materials_examined	Additional material. USNM 1001772 (2 ind.), Georges Bank, 40 ° 57.21 ' N, 066 ° 13.68 ' W, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR, 25 Jul 1986; USNM 1001773 (1 ind.) off New Jersey, 38 ° 35.98 ' N, 072 ° 52.86 ' W, 2195 m, coll. MMS Collections; USNM 1001777 (1 ind.), off New Jersey, United States, 2150 m, 1 Dec 1984, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR; USNM 1001713 (1 ind.), off Cape Lookout, North Carolina, 34 ° 11.16 ' N, 75 ° 38.98 ' W, 2006 m, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR, 14 Jul 1984; USNM 1001780 (1 ind.), off Delmarva, 37 ° 51.58 ' N, 73 ° 19.914 ' W, 2100 m, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR, 30 Nov 1984; USNM 1001781 (1 ind.), off New Jersey, 38 ° 29.28 ' N, 72 ° 42.11 ' W, 2507 m, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR, 4 Dec 1984; USNM 1001782 (1 ind.), off New Jersey, 38 ° 29.23 ' N, 72 ° 42.19 ' W, 2505 m, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR, 18 May 1985; USNM 1001783 (1 ind.), off New Jersey, 38 ° 29.23 ' N, 72 ° 42.19 ' W, 2505 m, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR, 18 May 1985; USNM 1001789 (1 ind.), Baltimore Canyon, Maryland, 37 ° 53.76 ' N, 73 ° 44.76 ' W, 1499 m, coll. MMS Collections, Atlantic Slope and Rise Program, ASLAR, 15 Nov 1985.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
7C05E9AF6997A802356DDF909EE7DC43.taxon	materials_examined	Comparative material. Ephesiopsis shivae, holotype MZSP 883 24 ° 07.637 ' S 45 ° 51.895 ' W, 09 Jan 1998, Sta. 6661, 147 m, Santos / Sao Paulo to Ilha Grande Bay / Rio de Janeiro; paratypes MZSP 1031 (2 ind.), 24 ° 07.637 ' S, 45 ° 51.895 ' W, 09 Jan 1998, Sta. 6661, 147 m, Santos / Sao Paulo to Ilha Grande Bay / Rio de Janeiro.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
7C05E9AF6997A802356DDF909EE7DC43.taxon	diagnosis	Diagnosis. Palps and lateral antennae digitiform, median antenna shorter. Tentacular cirri ellipsoid. Parapodia with 4 - 6 parapodial papillae; compound chaetae with blades 1.5 - 2.5 times as long as maximum width on mid-body chaetigers, simple chaetae wider and with angular silhouette; hooks present on first chaetiger.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
7C05E9AF6997A802356DDF909EE7DC43.taxon	description	Re-description. Measurements and general morphology. Holotype 2.2 mm long, 0.2 mm wide, with 26 chaetigers, divided in two. Body elongated, sub-quadrangular in section, with slightly convex dorsum. Anterior end bluntly rounded, slightly narrowing along posterior segments. Segmentation inconspicuous, tegument with transverse wrinkles. Preserved specimen lacking pigmentation. Head. Prostomium with five short appendages, including a pair of digitiform palps in ventral-most position, a pair of lateral antennae, similar in shape and size to palps, and a median antenna, shorter (one third) and thinner than lateral antennae (Fig. 2 A, B). A pair of tentacular cirri shorter than lateral antennae and palps. A few rounded (about six) small papillae confined by head appendages. Tubercles. First chaetiger with two dorsal macrotubercles; microtubercles absent (Fig. 2 B). Following chaetigers each with two dorsal macrotubercles arranged in two dorso-lateral longitudinal rows, and two microtubercles forming two longitudinal rows between the macrotubercles (Fig. 2 B-D, F). Macrotubercles sessile and spherical each provided with a digitiform terminal papilla (Fig. 2 B-D, F); with groups of pores around terminal papilla. All macrotubercles similar in shape and size. Microtubercles with digitiform terminal papilla generally longer than collar (Fig. 2 C). Spherical or ellipsoid papillae over dorsum, arranged in 3 - 4 transversal rows per chaetiger, with around 15 - 20 papillae on each mid-body chaetigers. Ventral surface with spherical papillae, arranged in four more or less regular transversal rows, with about 20 per segment, in mid-body; numbers decreasing towards posterior end (Fig. 2 F). Body epithelium with ellipsoid granules. Parapodia. Parapodia sub-conical, increasing in size towards chaetiger 3 (Fig. 2 B), around 1 - 3 times longer than wide (Fig. 2 C-E). Acicular lobe projecting distally anterior to chaetae, resembling other parapodial papillae or slightly longer (Fig. 2 E). Ventral cirri digitiform projecting as long as acicular lobe on anterior segments or shorter in mid-body and posterior ones (Fig. 2 C-E). Mid-body parapodia with 4 - 5 ellipsoid to digitiform papillae, all similar in size, in addition to the acicular lobe: 2 - 3 anterior, 1 - 2 posterior-ventral (Fig. 2 C-E). Chaetae. First chaetiger with two pairs of hooks, one pair on each parapodia together with elongate simple chaetae. One compound and 2 - 4 simple chaetae in all chaetigers, arranged in a curved transverse row around acicular lobe (Figs 1 A, B, 2 G-L). First and second chaetigers with slightly serrated long blades, 4 - 5 times longer than wide. Chaetae from chaetiger 3 with shafts widened sub-distally, a larger distal tooth and fine spinulation; blades twice as long as wide (Fig. 2 G-L). Pygidium. Pygidium terminal, with one mid-ventral digitiform anal cirrus and a pair of dorsal anal cirri, similar in shape but slightly smaller than macrotubercles (Fig. 2 F). Internal features. A pair of eyes anterior to first chaetiger. Reproductive features. Copulatory organs or eggs not seen in holotype. Paratype with eggs in coelomic cavity.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
7C05E9AF6997A802356DDF909EE7DC43.taxon	distribution	Distribution. From Dutch Guayana to New Jersey, 520 - 2507 m.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
814EBA650729E47B1FD66F148086E0EB.taxon	diagnosis	Diagnosis. Body short and ellipsoid. Macro- and microtubercles absent; papillae all over body surface and parapodia. Prostomial and peristomial appendages short, spherical or digitiform. Parapodia with simple chaetae, enlarged sub-distally, with serrated cutting edges; hooks absent.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
F17A7D1C2252F2FAE7C1D20DC22793D5.taxon	materials_examined	Material examined. Holotype: USNM 1001792, Off Charleston Bump South Carolina United States 32.3944 N, 77.0181 W, 799 m, coll. Battelle / Woods Hole Oceano graphic Institute for BLM / MMS, Atlantic Slope and Rise Program, ASLAR, 18 Nov 1985. Paratypes: USNM 1001791 (1 ind.), off Cape Fear, North Carolina, 33.0806 N, 76.4194 W, 896 m, 23 Sep 1985; USNM 1001793 (1 ind.), off New Jersey, 38.5944 N, 72.8953 W, 2024 m, 13 Nov 1985.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
F17A7D1C2252F2FAE7C1D20DC22793D5.taxon	diagnosis	Diagnosis. Body short and ellipsoid. Dorsum with approximately 20 sessile spherical papillae arranged in three transverse rows per segment. Ventrum with 4 - 6 larger papillae near the parapodial bases. Prostomial and peristomial appendages short and ellipsoidal. Parapodia without papillae; with 4 - 5 simple chaetae with serrated cutting edges, enlarged sub-distally.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
F17A7D1C2252F2FAE7C1D20DC22793D5.taxon	description	Description. Measurements and general morphology. Holotype 0.5 mm long, 0.2 mm wide, with 12 chaetigers; gravid female. Body ellipsoid, with strongly convex dorsum and flattened ventrum. Epithelium with transversal wrinkles, segmentation not noticeable (Fig. 4 A, B). Pigmentation absent on preserved material. Head. Head fused to first chaetiger (Figs 3 A, 4 A, B). Prostomial appendages ellipsoid, slightly longer than wide (Figs 3 A, 4 A). Pair of palps and pair of lateral antennae similar in size, median antenna smaller (Fig. 4 B). Dorsal antenniform papillae absent or not conspicuous. Few small hemispherical papillae scattered on head surface, approximately four arranged among palps and antennae. Tentacular cirri, ellipsoid, smaller than palps, similar in size and shape to median antenna (Fig. 4 A). Eyes not observed. Tubercles. Dorsum with three transverse rows of papillae per segment (Figs 3 A, 4 A, B). Papillae sessile, spherical but some larger and ellipsoid papillae over dorsum (Figs 3 C-E, 4 A), over 20 per segment on mid-body chaetigers. Ventrum with fewer and larger spherical papillae, arranged near parapodial bases in two transverse rows, about 4 - 6 papillae per segment (Fig. 4 B). Parapodia. Parapodia conical, as long as wide in all chaetigers (Fig. 4 D), small in anterior chaetigers. Acicular lobe hemispherical; ventral cirri ellipsoid longer than acicular lobe (Fig. 4 D). No additional papillae or parapodial appendages. Chaetae. Large, recurved hooks in first chaetiger absent. All parapodia with 4 - 5 simple chaetae; blades seemingly smooth on cutting edge and slight curved distal tip (Figs 3 D, E, 4 D, E). One straight acicula per parapodium. Pygidium. Pygidium with two dorsolateral pear-shaped tubercles and single midventral digitiform cirrus, longer than lateral cirri (Fig. 4 C). Internal features. Muscular pharynx visible though body wall from chaetiger 2 - 5. Reproductive features. Copulatory organs not observed. Ovoid eggs measuring 100 µm diameter occupy most of the coelomic cavity.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
F17A7D1C2252F2FAE7C1D20DC22793D5.taxon	etymology	Etymology. The epithet of this species refers to the type locality North Carolina.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
F17A7D1C2252F2FAE7C1D20DC22793D5.taxon	distribution	Distribution. North Carolina to New Jersey (US), from 799 to 2014 m.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
5DF4E7EA9EBAF27ED4461BF8BA93FFF3.taxon	diagnosis	Diagnosis. Body short and ellipsoid, some species slender. Four or more longitudinal rows of sessile macrotubercles with terminal papillae. Microtubercles absent (?). Papillae over body surface and parapodia. Prostomial and peristomial appendages short, spherical or digitiform. Parapodia with compound chaetae; hooks absent.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
6060297120C57143AAFC7B8E585CA04A.taxon	materials_examined	Material examined. Holotype: USNM 1001815, East of Cape Lookout, North Carolina, United States, north Atlantic, 34 ° 16.32 ' N, 75 ° 45.498 ' W, 640 m, 11 Nov 1983, MMS Collections, Atlantic Slope and Rise Program, ASLAR (CRSAP 1 st. 1 rep. 2 core 6 sec 0.2). Paratypes: USNM USNM 1407168, same sample, different cores (7 ind.). Additional material. USNM 1001801 (4 ind.), East of Cape Lookout, North Carolina, United States, North Atlantic, 34 ° 16.002 ' N, 75 ° 45.967 ' W, 580 m, 11 Nov 1983; USNM 1001802 (5 ind.), East of Cape Lookout, North Carolina, 34 ° 15.936 ' N, 75 ° 46.164 ' W, 583 m, 26 Mar 1984; USNM 1002041 (9 ind., 3 for SEM), East of Cape Lookout, North Carolina, 34 ° 15.816 ' N, 75 ° 45.786 ' W, 593 m, 27 Mar 1984; USNM 1002196 (1 ind.), East of Cape Lookout, North Carolina, 34 ° 49.8 ' N, 75 ° 13.5 ' W, 2003 m, 20 Jul 1985.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
6060297120C57143AAFC7B8E585CA04A.taxon	materials_examined	Comparative material. Sphaerephesia fauchaldi Kudenov, 1987 b, holotype NMNH 102785; Sphaerephesia longisetis Fauchald, 1972, holotype AHF POLY 0964; Sphaerephesia regularis Boeggemann, 2009, holotype ZMH P 25498, paratypes ZMH P 25497 (4 ind.), ZMH P 25499 (4 ind.); Sphaerephesia similisetis Fauchald, 1972, paratype AHF POLY 0967 (2 ind.). Sphaerephesia hutchingsae Capa and Bakken, 2015, holotype: AM W. 42748, East of Malabar, Sydney, New South Wales, Australia, 33 ° 58.717 S', 151 ° 18.00 ' E, 82 m, 22 Aug 1995; paratypes: east of Malabar, Sydney, New South Wales, 80 - 28 m. AM W. 42717 (1 ind.), AM W. 42721 (1 ind.), AM W. 42731 (2 ind.), AM W. 42749 (1 ind.), AM W. 42751 (1 ind.), AM W. 42752 (2 ind.), AM W. 42758 (1 ind.).	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
6060297120C57143AAFC7B8E585CA04A.taxon	diagnosis	Diagnosis. Four longitudinal rows of sessile, bottle-shaped macrotubercles with long digitiform terminal papilla and 3 - 4 transverse rows of small spherical papillae per segment. Microtubercles absent. Distance between dorsal-most macrotubercles similar to distance between those and lateral ones. Parapodia with ventral cirri nor surpassing length of acicular lobe and four rounded and small papillae. Parapodia with 4 - 7 compound chaetae, with thin shafts and blades 7 - 11 times as long as wide.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
6060297120C57143AAFC7B8E585CA04A.taxon	description	Description. Measurements and general morphology. Gravid female, 1.5 mm long, 0.2 mm wide, with 17 chaetigers. Body elongated, tapering at both ends, slightly flattened dorso-ventrally (wider than high). Dorsum convex and ventrum flattened (Fig. 5 A, B). Tegument with transverse wrinkles and segmentation not obvious (Fig. 5 A). Preserved specimen lacking pigmentation. Head. Anterior end bluntly rounded (Fig. 5 A, C-F). Prostomium with seven longer appendages including a pair of palps, in ventral-most position near the mouth, a pair of lateral antennae and a median antenna; and a pair of antenniform papillae behind lateral antennae, all digitiform, slightly wrinkled and similar in size except for the antenniform papillae, slightly shorter than lateral antennae (Fig. 5 C-F). Approximately 10 digitiform papillae confined by prostomial appendages and mouth, in frontal view (Fig. 5 D, F). A pair of tentacular cirri, similar in shape and size to lateral antennae and palps, and several scattered papillae similar to prostomial in head surroundings. Nuchal organ pits located between lateral antennae and tentacular cirri (Fig. 5 E). Tubercles. First and last chaetigers with two macrotubercles, sessile, bottle-shaped and provided with a long terminal papilla (Figs 5 A, C, D, 6 E). Rest of chaetigers with four macrotubercles each, arranged in four longitudinal rows along dorsum (Figs 5 C, 6 A, B). Distance between mid rows and lateral rows similar (Fig. 5 A-B). Shape and size of all macrotubercles similar, slightly decreasing in size in last chaetigers (Fig. 5 A). Spherical or ellipsoid papillae present over dorsum, arranged in 3 - 4 transversal rows per segment (Fig. 5 A, D, G), around 10 papillae present between mid-macrotubercles and five between these and lateral ones in mid-body segments (Fig. 5 A, G). Microtubercles absent. Ventral surface with small ellipsoid papillae, arranged in 3 - 4 irregular transversal rows (Fig. 5 H), with a total of around 12 papillae per segment in mid-body; numbers decreasing towards posterior end (Fig. 6 D). Body epithelium with ellipsoid granules (e. g. Fig. 6 A). Parapodia. Parapodia elongated, sub-conical, increasing in size towards chaetiger 4 and around 2 - 3 times longer than wide (Figs 5 B, H, 6 A-D). Acicular lobe projecting distally anterior to chaetae (Fig. 6 A-D). Ventral cirri sub-conical, pear-shaped, as long as acicular lobe in posterior chaetigers, and shorter in anterior (Figs 5 B, H, 6 A-E). Mid-body parapodia with about four small spherical papillae, all similar in size: one distal, on dorsal surface, one anterio-dorsal and one anterio-ventral and another ventral, all in proximal half of parapodia (Figs 5 H, 6 A-E). Chaetae. Compound chaetae present in all chaetigers, arranged in a curved transverse row (C-shaped) behind acicular lobe and numbering 4 - 7 per fascicle (Fig. 6 A-D). Shaft with slightly widened distal end with delicate, almost inconspicuous spinulation (Fig. 6 G, H). Blades decreasing in size from mid-fascicle to dorsal and ventral ends (7 - 11 times longer than maximum width), with fine and short spinulation along cutting edge and a slightly curved tip (Fig. 6 G, H). Pygidium. Pygidium terminal, with mid-ventral digitiform anal cirrus and a pair of dorsal anal cirri, similar in shape to macrotubercles (Fig. 6 E). Internal features. Eyes not observed in any specimen. Muscular pharynx runs along three anterior chaetigers. Reproductive features. Some paratypes and additional specimens examined are gravid females carrying large discoid eggs, 200 µm in diameter that occupy most of the body coelom, from the anterior to the posterior segments; other specimens seem to be filled with sperm. However, ' copulatory organs' were not observed in either females or males.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
6060297120C57143AAFC7B8E585CA04A.taxon	distribution	Distribution. Only known from type locality, East of Cape Lookout, North Carolina, United States, North Atlantic, ranging from 580 to 2003 m.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
6060297120C57143AAFC7B8E585CA04A.taxon	etymology	Etymology. Amphora, is a Greek word that refers to the pottery vases used since the Bronze Age by the Greco-Romans to transport liquids. The shape of these containers resembles the characteristic shape of the dorsal macrotubercles of this species.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
68F9E372A548D422A8B06BC9FE263EDF.taxon	diagnosis	Diagnosis. Body short and ellipsoid. Six or more longitudinal rows of macrotubercles on dorsum, in one transversal row per segment. Macrotubercles stalked and smooth, without terminal papilla. Smaller, stalked tubercles on ventrum. Microtubercles absent. Papillae over body surface and parapodia. Prostomial and peristomial appendages digitiform. Parapodia with only compound chaetae; hooks absent.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
775D22CD76BC4EE76D30301268757283.taxon	materials_examined	Material examined. Lectotype: USNM 393, Eastport, Maine, United States, North Atlantic Ocean, coll. Webster, H. E. Paralectotypes: USNM 1407984 (11 ind. and 4 slides), Eastport, Maine, United States, North Atlantic Ocean, coll. Webster, H. E. Paratypes: USNM 22873 (29 ind., 3 for SEM) Eastport, Maine, United States, North Atlantic Ocean, coll. Webster, H. E.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
775D22CD76BC4EE76D30301268757283.taxon	diagnosis	Diagnosis. Palps and lateral antennae digitiform, median antenna shorter and digitiform. Tentacular cirri digitiform. Eyes not observed. Parapodia with three (or four) parapodial papillae; compound chaetae with blades 4 - 5 times as long as maximum width on mid-body chaetigers.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
775D22CD76BC4EE76D30301268757283.taxon	description	Re-description. Measurements and general morphology. Holotype 1.1 mm long, 0.6 mm wide and with 22 chaetigers. Body ellipsoid, ovoid in cross-section, with slightly flattened ventrum and convex dorsum (Fig. 7 A-C). Anterior end blunt, mid-body broad, slightly narrowing along posterior segments (Fig. 7 A). Segmentation inconspicuous, tegument with transverse wrinkles (Fig. 7 A-C). Preserved specimen lacking pigmentation. Head. Prostomium with five short appendages, including a pair of digitiform palps in ventral-most position, a pair of digitiform lateral antennae, similar in size and shape as palps, and a digitiform median antenna, shorter than lateral antennae and palps (Fig. 7 C, F). A pair of tentacular cirri shorter than lateral antennae and palps, close to lateral antennae (Fig. 7 F). A few rounded small papillae scattered around head appendages (Fig. 7 F). Tubercles. First chaetiger with eight dorsal macrotubercles; following chaetigers each with one transversal row of dorsal macrotubercles increasing to 10 - 12 tubercles per segment from chaetiger 5 (Fig. 7 B-C). Macrotubercles spherical to club-shaped with a short and smooth stalk (Fig. 7 D-E); all macrotubercles similar in shape and size. Additional spherical and sessile papillae in different sizes over dorsum, arranged in 2 - 3 irregular transversal rows per chaetiger; 20 - 30 papillae on each mid-body chaetiger (Fig. 7 A-C). Ventral surface with spherical papillae in different sizes, arranged in 2 - 3 transversal rows in a zig-zag pattern, with about 20 per segment in mid-body; numbers decreasing towards posterior end (Fig. 7 A, C). Parapodia. Parapodia sub-conical, increasing in size towards chaetiger 3 (Fig. 7 C), around 2 times longer than wide (Fig. 7 G, H). Acicular lobe anterior to chaetae, digitiform to clavate, longer than parapodial papillae and projecting distally (Fig. 7 C, G, H). Ventral cirri digitiform projecting 1 / 2 to 2 / 3 as long as acicular lobe on anterior and mid-body segments, almost as long as in posterior segments (Fig. 7 C, G, H). Parapodia with three spherical to clavate papillae: one on anterio-dorsal surface, one on anterio-basal position (Fig. 7 F-H), and one on the posterior surface (Fig. 7 F-G). Chaetae. All parapodia with 4 - 7 compound chaetae, arranged in a curved transverse row around acicular lobe (Fig. 7 F-I). Serrated, long blades, 4 - 5 times longer than maximum width, with a curved tip (Fig. 7 J-L), similar throughout. Pygidium. Pygidium terminal, with one mid-ventral digitiform anal cirrus projecting beyond parapodia, and one pair of clavate anal cirri, at base on median cirrus (Fig. 7 I). Internal features. Specimens are all opaque after fixation and preservation and internal features not observable. Reproductive features. Copulatory organs or eggs not seen in type specimens.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
775D22CD76BC4EE76D30301268757283.taxon	distribution	Distribution. This species is known from the New England region of the US. It has been reported from the North Atlantic (e. g. Hartmann-Schroeder 1996), North Pacific (e. g. Berkeley and Berkeley 1948) and Japan (Imajima 1969, 2009). The emer gence of descriptions of new species similar to Sphaerodoridium minutum suggests a review of the true identity of reported specimens is needed.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
77C4CFAB568F7841D44CDFBEFBEE640E.taxon	diagnosis	Diagnosis. Body generally short and ovoid, some forms slender. Four or more longitudinal rows of macrotubercles, in one or several transverse rows per segment. Macrotubercles sessile and smooth, without terminal papillae. Microtubercles absent. Papillae over body surface and parapodia. Prostomial and peristomial appendages short, spherical or digitiform. Parapodia with compound chaetae; hooks absent.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
0E2E29A56E979BF073F21489A3FD4863.taxon	materials_examined	Material examined. Holotype: LACM- AHF POLY 950, west of Atlantis Canyon, New England continental slope, North Atlantic, 39 ° 56.5 ' N, 70 ° 39.9 ' W, 400 m, 28 Aug 1962. Additional material. USNM 1002203 (1 ind.), off Massachusetts, United States, North Atlantic Ocean, 40 ° 01.284 ' N, 70 ° 55.032 ' W, 255 m, 8 Dec 1984; USNM 1002207 (6 ind., 3 for SEM) Lydonia Canyon, Georges Bank, United States, 40 ° 21.114 ' N, 67 ° 32.232 ' W, 590 m, 28 Apr 1985; USNM 1002209 (4 ind.) ff Massachusetts, United States, 40 ° 01.248 ' N, 70 ° 55.086 ' W, 250 m, 4 May 1985; USNM 1002193 (2 ind., 1 for SEM), Off Cape Hatteras, North Carolina, United States, 35 ° 26.268 ' N, 74 ° 41.436 ' W, 2003 m, 24 May 1985; USNM 1002212 (1 ind.) off Massachusetts, United States, 39 ° 50.382 ' N, 70 ° 01.65 ' W, 1239 m, 27 Nov 1985; USNM 1001989 (2 juvenile ind.) off New Jersey, United States, 38 ° 40.068 ' N, - 072 ° 56.418 ' W, 1519 m, 13 Nov 1985; USNM 1001830 (1 ind.), Baltimore Canyon, United States, 37 ° 53.286 ' N, 73 ° 45.264 ' W, 1619 m, 7 Aug 1984; USNM 1002032 (1 ind.), off Massachusetts, 39 ° 48.36 ' N, 70 ° 54.93 ' W, 1249 m, coll. Battelle-New England Marine Research Lab For BLM / MMS, 30 Nov 1985; USNM 1002033 (1 ind.), Georges Bank, 41 ° 01.35 ' N, 66 ° 20.23 ' W, 1345 m, coll. Battelle-New England Marine Lab For BLM / MMS, 25 Jul 1986; USNM 1002035 (1 ind.), Georges Bank, 41 ° 01.54 ' N, 66 ° 20.11 ' W, 1345 m, coll. Battelle-New England Marine Lab For BLM / MMS, 25 Jul 1986.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
0E2E29A56E979BF073F21489A3FD4863.taxon	materials_examined	Comparative material. Sphaerephesia fauchaldi Kudenov, 1987 b, holotype NMNH 102785; Sphaerephesia longisetis Fauchald, 1972, holotype AHF POLY 0964; Sphaerephesia regularis Boeggemann, 2009, holotype ZMH P 25498, paratypes ZMH P 25497 (4 ind.), ZMH P 25499 (4 ind.); Sphaerephesia similisetis Fauchald, 1972, paratype AHF POLY 0967 (2 ind.). Sphaerephesia hutchingsae Capa & Bakken, 2015, holotype East of Malabar, Sydney, New South Wales, Australia, AM W. 42748, 33 ° 58.71667 ' S, 70 ° 39.9 ' E, 82 m, 22 Aug 1995; paratypes from nearby collecting sites (see Capa and Bakken 2015).	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
0E2E29A56E979BF073F21489A3FD4863.taxon	diagnosis	Diagnosis. Body ellipsoid, with four longitudinal rows of sessile, rounded to pear-shaped macrotubercles without terminal papillae, per segment. Distance between dorsal-most macrotubercles exceeds distance between those and lateral ones. Parapodia with ventral cirri as long as acicular lobe or slightly shorter and 4 - 6 rounded, small papillae, sometimes a dorsal one slightly larger. Parapodia with 10 - 16 compound chaetae, with thin shafts and blades 12 - 16 times as long as wide.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
0E2E29A56E979BF073F21489A3FD4863.taxon	description	Re-description. Measurements and general morphology. Gravid female, 2 mm long, 0.5 mm wide, with 17 chaetigers. Body ellipsoid, slightly flattened dorso-ventrally (wider than high). Tegument with transverse wrinkles and segmentation only barely discernible. Preserved specimen lacking pigmentation. Head. Anterior end bluntly rounded (Fig. 8 A-F). Prostomium with seven longer appendages, including a pair of palps, in ventral-most position near the mouth, conical, wrinkled and about 4 - 5 times longer than wide at base; a pair of lateral antennae, similar in shape and size to palps; a median antenna, shorter (two thirds) than lateral antennae and with a rounded distal end; and a pair of antenniform papillae behind lateral antennae, similar in shape and size to median antenna, or smaller (Fig. 8 C-F). Around 20 digitiform smaller papillae confined by prostomial appendages and mouth, in frontal view (Fig. 8 F). One pair of tentacular cirri similar in shape and size to lateral antennae and palps. Tubercles. First chaetiger with two macrotubercles; rest of chaetigers with four macrotubercles, each arranged in four longitudinal rows along dorsum (Fig. 8 A-D, G). Distance between mid-rows larger than between these and lateral rows of macrotubercles (Fig. 8 G). Size of all macrotubercles similar, with base as large as base of parapodia or smaller, or slightly increasing in size in first four chaetigers (Fig. 8 A-B), also slightly reducing in size in posterior chaetigers towards pygidium. Macrotubercles spherical or pear shaped, with some pores (Fig. 8 G-J). Spherical papillae present over dorsum and ventrum, with arrangement hard to determine in holotype. Parapodia. Parapodia sub-conical, 1 - 2 times longer than wide (shorter in anterior and posterior most chaetigers), wrinkled (Fig. 9 A-E). Acicular lobe projecting distally anterior to chaetae (Fig. 9 A-E). Ventral cirri sub-conical, similar in length to acicular lobe but not projecting over the tip of acicular lobe (Fig. 9 A). Mid-body parapodia with 4 - 5 spherical papillae: 1 - 2 on dorsal surface, 1 on anterior surface, 2 on ventral surface and 0 - 1 on posterior surface (Fig. 9 A-F); all similar in size or a dorsal slightly larger. Chaetae. Compound chaetae present in all chaetigers, arranged in a curved transverse row around acicular lobe and numbering 8 - 12 per fascicle in mid-body chaetigers (Fig. 9 A-E). Blades similar in length along fascicles (12 - 16 times longer than maximum width), only slightly longer than those from mid-fascicle, with fine and short spinulation along superior edge, slightly curved (Fig. 9 G). Pygidium. Pygidium terminal, with mid-ventral digitiform anal cirrus and a pair of dorsal anal cirri, similar in shape to macrotubercles but slightly smaller. Internal features. Eyes not observed in any specimen; holotype with a pair of reddish anterior spots that may not be eyes, but the nuchal organs. Muscular pharynx runs along chaetigers 3 - 6. Reproductive features. Holotype and a few of the additional specimens examined are gravid females carrying large discoid eggs, 200 µm in diameter that occupy most of the body coelom, from the anterior to the posterior segments. " Copulatory organs " not observed.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
0E2E29A56E979BF073F21489A3FD4863.taxon	distribution	Distribution. New England, United States, 250 - 2000 m.	en	Capa, Maria, Osborn, Karen J., Bakken, Torkild (2016): Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia. ZooKeys 615: 1-32, DOI: http://dx.doi.org/10.3897/zookeys.615.9530, URL: http://dx.doi.org/10.3897/zookeys.615.9530
