taxonID	type	description	language	source
E115879CFF9AFF8CFF7EFF70FE32F9CB.taxon	description	Type­ locality. Intertidal mudflat, St- 6 a — Gilsang-myeon, Ganghwa Island, Korea, Yellow Sea, 37 ° 35 ’ 55.9 ” N 126 ° 30 ’ 49.2 ” E (Fig. 1). Type­material. Holotype: 1 female adult in 70 % ethanol (NIBRIV 0000860820). Samples were collected by Vinod Vakati, 06 March 2015.	en	Vakati, Vinod, Lee, Wonchoel (2021): - On- two- new- species- of- Nannopus- Brady, - 1880 - (Copepoda: - Harpacticoida Nannopodidae) - from-intertidal-mudflats-of-the-Korean-west-coast- (Yellow-Sea). Zootaxa 5051 (1): 529-549, DOI: https://doi.org/10.11646/zootaxa.5051.1.21
E115879CFF9AFF8CFF7EFF70FE32F9CB.taxon	etymology	Etymology. The species epithet is derived from the Latin “ cylindricus ”, cylindrical, and alludes to the shape of the proximal region of caudal seta V. Description­of­female­ (based­on­holotype). Body (Fig. 2 A – B) fusiform narrow, total body length 719 μm, measured from tip of rostrum to posterior margin of caudal rami. Maximum width 218 μm, measured at posterior margin of cephalothorax. Boundary between prosome and urosome clearly visible, urosome / prosome length ratio 0.73, and body length / width ratio about 3.2. Body ornamentation consisting of dorsal denticles, and horizontal row of setules as in N. ganghwaensis (see Vakati et al. 2016: 217, Fig. 3 A – D). Cephalothorax (Fig. 2 A) anteriorly attenuated in dorsal view, comprising 28 % of total body length, posterior margin serrated, with several paired sensilla and one row of sensilla (Fig. 2 A). Rostrum as in N. ganghwaensis and with pair of sensilla as in N. didelphis (see Fiers & Kotwicki 2013: 41, Fig. 4 G; Vakati et al. 2016: 216, Fig. 2 C). Prosome (Fig. 2 A) 4 - segmented, comprising cephalothorax and three subequal pedigerous somites. P 1 - bearing somite fused to cephalothorax, posterior margin of free pedigerous somites serrated, and with row of sensilla posteriorly. Urosome (Fig. 2 A – B) tapering posteriorly, comprising P 5 - bearing somite, genital double-somite, two free abdominal somites, and anal somite. Posterior margin of P 5 - bearing somite and first half of genital double-somite serrated dorsally; second half of genital double-somite, fourth and fifth urosomites with posterior margin serrated dorsally and ventrally; each somite with sensilla dorsally except for penultimate somite and one row of spinules ventrally. Genital double-somite as in N. ganghwaensis (see Vakati et al. 2016: 221, Fig. 7 A), completely fused ventrally, distinct dorsally and laterally (Fig. 2 A – B), with serrated posterior margin dorsally, and smooth ventrally except for spinular row along posterior margin; copulatory pore not visible (completely translucent). Anal somite (Figs. 2 A, 3 A – B) with well-developed operculum, covered with setules posteriorly; almost as long as wide, with pair of dorsal sensilla and with one row of spinules on either side of somite ventrally. Caudal rami (Fig. 3 A – C) cylindrical, clearly separated from anal somite, 1.7 (in dorsal view) and 2 (in ventral view) times as long as wide. Ornamentation consisting of setules as in N. ganghwaensis (see Vakati et al. 2016: 222, Fig. 8 A – B), and row of spinules along posterior margin ventrally (Fig. 3 B). Caudal ramus bearing seven setae: seta I naked, shorter than ramus width, located anterodorsally; seta II naked, shorter than ramus width, inserted anterodorsally midway and close to outer margin; seta III naked, almost as long as ramus length, and inserted anterolaterally midway along outer margin; seta IV bipinnate, located distally, and 0.5 times as long as seta V; seta V longest, bipinnate, located distally, anterior part inflated and heavily cylindrical (arrowed in Fig. 3 A – C); seta VI small, and naked; seta VII triarticulate, naked, and located midway along inner margin. Antennule, antenna, mouth parts, P 1 – P 6 as in N. ganghwaensis (see Vakati et al. 2016: 218 – 221, Figs. 4 A – F, 5 A – B, 6 A – B, 7 A – D, E). Male. Unknown.	en	Vakati, Vinod, Lee, Wonchoel (2021): - On- two- new- species- of- Nannopus- Brady, - 1880 - (Copepoda: - Harpacticoida Nannopodidae) - from-intertidal-mudflats-of-the-Korean-west-coast- (Yellow-Sea). Zootaxa 5051 (1): 529-549, DOI: https://doi.org/10.11646/zootaxa.5051.1.21
E115879CFF9AFF86FF7EF944FE18F9B7.taxon	description	Type­ locality. Intertidal mudflat, St- 8 — Yeongheung-myeon, Ongjin-gun, Korea, Yellow Sea, 37 ° 14 ’ 16.6 ” N 126 ° 28 ’ 16.8 ” E (Fig. 1).	en	Vakati, Vinod, Lee, Wonchoel (2021): - On- two- new- species- of- Nannopus- Brady, - 1880 - (Copepoda: - Harpacticoida Nannopodidae) - from-intertidal-mudflats-of-the-Korean-west-coast- (Yellow-Sea). Zootaxa 5051 (1): 529-549, DOI: https://doi.org/10.11646/zootaxa.5051.1.21
E115879CFF9AFF86FF7EF944FE18F9B7.taxon	materials_examined	Type­ material. Holotype: 1 male adult in 70 % ethanol (NIBRIV 0000860821). Samples were collected by Vinod Vakati, 20 November 2013.	en	Vakati, Vinod, Lee, Wonchoel (2021): - On- two- new- species- of- Nannopus- Brady, - 1880 - (Copepoda: - Harpacticoida Nannopodidae) - from-intertidal-mudflats-of-the-Korean-west-coast- (Yellow-Sea). Zootaxa 5051 (1): 529-549, DOI: https://doi.org/10.11646/zootaxa.5051.1.21
E115879CFF9AFF86FF7EF944FE18F9B7.taxon	etymology	Etymology. The species epithet is derived from the Latin “ robustus ”, referring to the very strong and sturdy distal-most apical spine of P 2 exp- 2.	en	Vakati, Vinod, Lee, Wonchoel (2021): - On- two- new- species- of- Nannopus- Brady, - 1880 - (Copepoda: - Harpacticoida Nannopodidae) - from-intertidal-mudflats-of-the-Korean-west-coast- (Yellow-Sea). Zootaxa 5051 (1): 529-549, DOI: https://doi.org/10.11646/zootaxa.5051.1.21
E115879CFF9AFF86FF7EF944FE18F9B7.taxon	etymology	Description­ of­ male­ (based­ on­ holotype). ­ Body fusiform (Fig. 4 A – B) narrow, total body length 461 μm, measured from tip of rostrum to posterior margin of caudal rami. Maximum width 138 μm, measured at posterior margin of cephalothorax. Body slightly slender, tapering posteriorly. Urosome / prosome length ratio 0.71 (Fig. 4 A) and body length / width ratio about 3.3. Body ornamentation as in N. serratus (see Vakati & Lee 2017: 24, 27, Figs. 17 A – F, 19 A – D). Each urosomite with rows of slim setules ventrally as in N. serratus (see Vakati & Lee 2017: 24, Fig. 17 F). Cephalothorax (Fig. 4 A) bell-shaped, slightly narrow, comprising 36 % of total body length, with a few paired sensilla and serrated posterior margin. Rostrum as in N. serratus (see Vakati & Lee 2017: 23, Fig. 16 C). Prosome (Fig. 4 A – B) 4 - segmented, comprising cephalothorax and three subequal free pedigerous somites. P 2 - bearing somite with two long medial sensilla dorsally, posterior margins of prosomites serrated, and with few sensilla as figured. Urosome (Fig. 4 A – B) 5 - segmented, comprising P 5 - bearing somite, genital double-somite, two free abdominal somites, and anal somite. Posterior margins of urosomites serrated dorsally and ventrally. Posterior margin of genital double-somite and following somite with pair of strong sensilla ventrally as in N. serratus (see Vakati & Lee 2017: 29, arrowed in Fig. 21 B). Each somite with one transverse row of spinules along posterior margin ventrally. Genital double-somite as in N. serratus (see Vakati & Lee 2017: 29, Fig. 21 B), clearly distinct dorsally and ventrally, with serrated dorsal posterior margin. Anal somite (Figs. 4 A, 5 A – C) almost as long as wide with unique pattern of surface ornamentation dorsally as in N. serratus, ventral surface with six spinules (see Vakati & Lee 2017: 29, Fig. 21 C – D). Caudal rami (Fig. 5 A – C) square (dorsally) or sub-cylindrical (ventrally), almost as long as wide (in dorsal view), almost twice as long as wide (in ventral view), and with row of spinules along posteroventral margins. Caudal ramus bearing seven setae: seta I pinnate, shorter than ramus width, and located anterolaterally; seta II pinnate, almost as long as ramus length, and inserted anterolaterally midway along outer margin; seta III pinnate, as long as ramus length, and inserted anterolaterally midway along outer margin; seta IV bipinnate, 0.5 times as long as seta V, located at outer posterior margin and wide at proximal region; seta V strongest, bipinnate with proximal part heavily cylindrical and smooth (arrowed in Fig. 5 A – C), and located at inner posterior margin; seta VI naked, small, and located at inner posterior corner; seta VII slender, flexible, triarticulate, pinnate, located midway along inner margin. Antennule, maxillule, maxilla, and maxilliped as in N. ganghwaensis (see Vakati et al. 2016: 218, Fig. 4 A, D – F). Antenna, mandible, P 1 – P 6 as in N. serratus (see Vakati & Lee 2017: 23, 25, 30, Figs. 16 D – F, 18 A, E, 22 B – D). P 2 (Fig. 5 D – E) with smooth and short concave intercoxal sclerite (not illustrated). Praecoxa somewhat triangular and shorter than coxa. Coxa with one spinular row on anterior surface. Basis with one row of outer spinules on anterior surface, one row of distal spinules near insertion of exopod, and one row of distal spinules near insertion of endopod. Basal outer seta naked. Exopod 3 - segmented, and all segments subequal in length. Each exopodal segment with robust outer spinules and without inner setules. Exp- 2 without inner seta. Exp- 1 to - 2 with serrated outer spines, exp- 3 outer spines smooth, and outer distal-most spine heavily robust (arrowed in Fig. 5 D), hook-shaped or recurved, and relatively longer. Endopod 2 - segmented, both segments subequal in size, with one smooth outer distal spine and one pinnate inner distal seta. Female. Unknown.	en	Vakati, Vinod, Lee, Wonchoel (2021): - On- two- new- species- of- Nannopus- Brady, - 1880 - (Copepoda: - Harpacticoida Nannopodidae) - from-intertidal-mudflats-of-the-Korean-west-coast- (Yellow-Sea). Zootaxa 5051 (1): 529-549, DOI: https://doi.org/10.11646/zootaxa.5051.1.21
