taxonID	type	description	language	source
038387C0FF89FFFD785BFEB3FD1F76A4.taxon	diagnosis	Diagnosis: Tachidiidae. Rostrum elongate, delimited at base. Paired lateral integumental windows on P 5 - bearing somite present. Genital and first abdominal somites fused in ♀ original segmentation marked by transverse surface ridge dorsally and laterally; midventral copulatory pore not isolated from gonopores. Anal operculum spinulose. Caudal ramus setae IV – V well developed and pinnate. Sexual dimorphism in antennule, P 2 endopod, P 3 exopod, P 5, P 6, urosomal ornamentation and segmentation. Antennule with numerous pinnate setae / spines; 7 - segmented in both sexes; chirocer in ♂, with aesthetascs on segments 4, 6 and 7; segment 5 in ♂ with spinous outgrowth. Antenna with (indistinctly) 2 - segmented exopod; exp- 1 with one seta, exp- 2 with one lateral and two apical setae; lateral endopodal spine proximally displaced. Mandible with two setae on basis, five setae on exopod and three lateral and nine apical setae on endopod. Maxillule with four setae and one geniculate spine on coxa, and six elements on basis; exopod represented by one seta, endopod 1 - segmented with three setae. Maxillary syncoxa with enditic formula [4,3,3]; allobasis with three accessory setae; endopod indistinctly 2 - segmented with one geniculate spine and five setae. Maxilliped with two accessory setae on endopod; claw minutely pinnate. P 1 – P 4 with 3 - segmented rami; enp- 1 of normal size and with inner seta. P 1 exp- 3 with two outer spines, enp- 3 with one inner seta. P 3 enp- 3 with five setae / spines. P 4 enp- 2 with one inner seta. Armature formula as follows: Exopod Endopod P 1 0.1.122 1.1.121 P 2 1.1.222 1.2.221 P 3 1.1.222 1.2.221 P 4 1.1.122 1.1.221 P 2 ♂ enp- 2 with outwardly directed spinous apophysis; enp- 3 small, anterior surface with transverse spinular comb concealing tip of enp- 2 apophysis, outer spine reduced in size, outer distal seta rudimentary and fused to segment, inner setae well developed. P 3 exopod ♂ longer than in ♀ with exp- 3 often bent inwards; inner setae of exp- 1 and - 2 smaller than in ♀ inner distal seta of exp- 3 vestigial. P 5 ♀ with outer concavity, separating outer lobe from distal portion; outer lobe with basal plumose seta and pinnate spine; distal portion with plumose seta flanked by strong pinnate spines around apex, and two (endopodal) pinnate spines along inner margin. P 5 ♂ medially fused; each with three pinnate spines and two setae. P 6 ♀ represented by opercula closing off common genital slit, each with one seta. P 6 ♂ symmetrical; each member with two pinnate spines and naked outer basal seta. Free-living. Freshwater or brackish habitats. Type species: Tachidius (Neotachidius) triangularis Shen & Tai, 1963 = Neotachidius triangularis (Shen & Tai, 1963) comb. nov. [by monotypy] Other species: N. coreanus sp. nov.; N. parvus sp. nov.	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF8AFFF17B86FD8BFF1D7252.taxon	materials_examined	Type material: Holotype ♀ (NMNH reg. no. 251948) dissected and mounted on slides. Paratypes are 1 ♀ (NMNH reg. no. 251949) and 4 ♂♂ (NMNH reg. nos. 251950 – 53) dissected and mounted on slides; 20 ♀♀ and 20 ♂♂ in alcohol (NMNH reg. no. 251954); 11 ♀♀ and 5 ♂♂ in alcohol (NHM reg. nos. 2003.755 – 770). Type locality: Station 5 in a small river discharging into Kwangyang Bay, South Korea (34 ∞ 57.1 ¢ N, 127 ∞ 36.4 ¢ E), salinity 11.10 ‰ (see Ohtsuka et al. 1992). Body length: ♀: 690 ± 40 mm (N = 53); ♂: 600 ± 40 mm (N = 51). Description Based on NMNH paratypes (reg. nos. 251949 – 53) and NHM paratypes (reg. nos. 2003.755 – 770). Female: Body robust (Fig. 1 A), cyclopiform, with distinct separation between prosome and urosome. Rostrum (Figs 4 B, 5 A) weakly defined at base, ventrally directed, not discernible in dorsal aspect (Fig. 1 A); elongate-ovoid with slightly constricted tip; dorsal surface with two pairs of sensillae and three median pores. Cephalosome (Figs 1 A, 2 A, 3 A) with spinules along posterior margin and setules around lateroventral margins; with median dorsal and paired lateral integumental windows; sensillar and pore patterns as figured in Figure 1 A. Tergite of first pedigerous somite rudimentary, represented by a transverse sclerite (Figs 1 A, 2 B; arrowed in Figs 2 A, 3 A, B) which is partly fused along its lateral sides to that of the second pedigerous somite. Somites bearing P 2 – P 5 (Fig. 3 A) with paired lateral integumental windows; free margins of tergites with long spinules all around except for denticulate dorsal margin of P 4 - bearing somite (Fig. 1 A); dorsal surfaces with minute spinule rows, pores and sensillae as figured. P 5 - bearing somite with serrate posterior margin, with serrations being larger laterally than dorsally (Fig. 9 C); lateral integumental windows largely concealed beneath tergite of preceding somite (Fig. 3 A) and surrounded by spinule rows (Fig. 9 C). Original segmentation of genital double-somite marked by bilateral constriction and dorsal serrate surface ridge. Genital field positioned ventrally on raised anterior half of double-somite (see lateral aspect; Fig. 9 C). Genital apertures fused medially forming common genital slit (Figs 1 B, 2 C), closed off on either side by unisetose operculum derived from P 6 (Figs 1 B, 9 C). Isolated copulatory pore not discernible, probably located medially within genital slit (Figs 1 B, 2 C). Single median seminal receptacle present (Fig. 9 C). Raised ventral surface posterior to genital field with three spinule rows (anteriormost paired) (Figs 1 B, 2 C). Median integumental pore present anterior to genital slit (arrowed in Fig. 2 C). Remaining urosomites with spinules around posterior margin and surface ornamentation as figured (Fig. 1 A, B). Anal somite with two spinule rows dorsally and spinulose operculum (Fig. 10 D). Caudal rami (Figs 1 B, 10 D) slightly convergent and slightly longer than wide, with oblique spinule row on dorsal surface and short row of fine spinules dorsolaterally (arrowed in Fig. 10 D). With seven setae: I well developed, bare; II bare, displaced to near seta VII; III bipinnate and spiniform, with subapical flagellate extension; IV and V bipinnate and with fracture planes; VI swollen at base and typically with few spinules at inner proximal margin; VII bi-articulate at base and naked. Antennule (Fig. 4 A) short, 7 - segmented. Segment 1 with spinule rows around posterior and anterior margins. Armature formula: 1 - [1 pinnate], 2 - [1 naked + 7 pinnate], 3 - [5 naked + 3 pinnate], 4 - [3 pinnate + (1 naked + ae)], 5 - [2 pinnate], 6 - [2 naked + 6 pinnate], 7 - [5 naked + 1 pinnate + acrothek]. Apical acrothek consisting of aesthetasc and plumose seta. Antenna (Fig. 4 C, D) with spinule rows on abexopodal margin of basis and proximal endopod segment. Exopod incompletely 2 - segmented; exp- 1 shortest, with one pinnate spine; exp- 2 with short pinnate spine fused to lateral margin and two unequal pinnate spines apically; few coarse spinules present around outer distal corner of exp- 2. Distal endopod segment laterally with one naked spine in proximal third and one plumose seta plus one unipinnate spine in middle third (Fig. 4 D); both lateral spines with subapical tubular extension. Apical armature of enp- 2 consisting of one unipinnate spine and four geniculate setae; longest geniculate seta with long setules and fused at base to short pinnate seta; segment with various spinule rows as figured. Labrum (Fig. 5 C) strongly developed, weakly trilobate; median lobe with short strong spinules along free margin and densely packed spinules plus a large median pore on posterior surface; lateral lobes each with double row of long spinules. Mandible (Fig. 3 C, D). Gnathobase with series of blunt, multicusped teeth; dorsal corner with strong spine bearing minute spinules along dorsal margin and very coarse spinules along ventral margin. Basis relatively small, with two short plumose setae. Endopod longer than exopod, without surface spinules; with three plumose setae laterally (two fused at base) and nine setae apically (seven naked, two pinnate), several of which fused to segment. Exopod 1 - segmented, with one short seta near proximal margin and four plumose setae along lateral margin and apex; distalmost three setae fused to segment. Paragnaths (Fig. 5 C) strongly developed lobes with medially directed long spinules. Maxillule (Fig. 6 B, C). Praecoxal arthrite with six spines, one pinnate seta and one minute tube-seta around distal margin; anterior surface with two juxtaposed setae; posterior surface with two pinnate setae, innermost very large and typically curved (Fig. 6 C). Coxal endite with long spinules on anterior surface; with two smooth and three pinnate (of which one geniculate) setae. Basis with long setules on anterior surface; armature consisting of four naked and two pinnate (of which one geniculate) setae. Endopod a small segment with one plumose and two naked setae. Exopod represented by a single plumose seta. Maxilla (Fig. 9 A). Syncoxa with three endites and long spinules along outer margin; proximal endite expanded distally, with one large and three shorter pinnate setae; middle and distal endites cylindrical, each with one naked and two pinnate setae. Allobasis with long setules along outer margin; drawn out into pinnate claw; accessory armature consisting of one naked and two pinnate setae. Endopod (Fig. 5 B) indistinctly 2 - segmented with one geniculate spine, two pinnate and three naked setae. Maxilliped (Figs 4 E, 5 E). Syncoxa with spinular row near medial distal corner and smaller spinules around proximal outer margin. Basis outer margin with slender spinules in proximal half. Endopod with curved claw and two minute accessory setae, one of which is tubular (Fig. 5 E). P 1 (Fig. 6 A). Intercoxal sclerite bilobate, with strong spinules on anterior surface. Praecoxa well developed, with long spinules on anterior surface. Coxa with various anterior spinule rows as figured. Basis with produced lobate inner process bearing spinules anteriorly and setules posteriorly; outer and inner basal setae bipinnate. Rami 3 - segmented. Exopod shorter than endopod; inner margin of segments with setules, outer margin with spinules; outer spines with subapical flagellate extension. Endopod with small enp- 3; distal and outer margins of all segments with spinules; few spinules also present on proximal inner margin of enp- 2 and - 3; outer distal element of enp- 3 spiniform and bipinnate. Posterior surface of endopod segments and exp- 1 and - 2 typically with spinule patches. P 2 - P 4 (Figs 7 A, 8 A, 9 B). Intercoxal sclerites with spinules anteriorly (P 2 – P 4) and posteriorly (P 2 – P 3). Praecoxa a small sclerite with anterior spinules. Coxa typically with very long spinules anteriorly and various spinule rows arranged around outer margin. Inner margin of basis forming lobate setulose expansion; with spinules around distal and outer margin as figured; outer basal seta bare (P 2) or sparsely plumose (P 3 – P 4). Endopods shorter than exopods; rami 3 - segmented. Exp- 1 and - 2 (and - 3 in P 4), and enp- 2 and - 3 typically with posterior spinule patches. Inner margin of exp- 1 and - 2 (and - 3 in P 4) with few long setules; spinular ornamentation around distal and outer segment margins as figured. Exp- 3 of P 2 – P 3 forming spinous extension between bases of distal outer spine and outer apical spine. Armature formula of P 1 – P 4 as for genus. P 5 (Fig. 7 D) about 1.05 times as long as maximum width; typically with distinct outer concavity, separating outer lobe from distal portion; with numerous spinular rows on both posterior and anterior surfaces as figured; outer lobe with basal plumose seta and pinnate spine; distal portion with plumose seta flanked by strong pinnate spines around apex, and two pinnate spines along inner margin; anterior surface with three secretory pores (one marginal). Male: Sexually dimorphic in size, urosome ornamentation and segmentation, antennule, P 2 endopod, P 3 exopod, P 5 and P 6. Antennule (Fig. 10 B) 7 - segmented, with one segment distal to geniculation (chirocer condition). Segment 1 with sclerite around base; posterior margin forming lobate extension bearing long spinules; with numerous spinule rows around anterior margin as figured (Fig. 10 B, C). Segment 3 with bulbous process on proximal posterior margin bearing plumose seta. Segment 4 largely membranous around posterior margin; anterior margin with dorsal spinous process. Segment 5 minute, represented by a small sclerite on anterior margin (Fig. 14 D; arrowed in Fig. 15 B for N. parvus). Segment 6 (Fig. 14 D) very large and swollen; with incomplete transverse surface suture ventrally and posteriorly; anterior margin forming multicuspidate structure (typically with eight cusps) in proximal half; with modified longitudinally striated element often closely adpressed to anterior surface (Fig. 14 D; cf. Fig. 15 D for N. parvus). Segment 7 (Figs 10 B, 14 E) hook-shaped, without surface sutures marking original segmentation; apex weakly chitinized, recurved; anterior surface forming longitudinal furrow containing two basally fused elements (arrowed in Fig. 14 C) as in N. parvus (Fig. 15 C). Armature formula: 1 - [1 pinnate], 2 - [1 pinnate], 3 - [6 bare + 5 pinnate], 4 - [6 bare + 2 pinnate + ae], 5 - [2 pinnate], 6 - [9 bare + 3 pinnate + 1 striated element + (1 + ae)], 7 - [12 + 2 modified + acrothek]. Apical acrothek consisting of short aesthetasc and small naked seta. Many setae on segments 3 – 4 with proximal flexure zone. P 2 endopod (Figs 7 B, 16 A, C). Middle segment enlarged on inner margin, forming outwardly directed spinous apophysis partly overlying enp- 3 anteriorly; inner setae markedly shorter than in ♀. Enp- 3 small (Figs 7 C, 16 A), with row of long setules on anterior surface, typically overlying apex of spinous apophysis; outer distal seta strongly reduced, represented by minute, basally fused spine with recurved tip; outer spine reduced. P 3 exopod (Fig. 8 B) distinctly longer and more slender than in ♀. Inner setae of exp- 1 and - 2 smaller than in ♀. Exp- 2 elongate; posterior spinules absent. Exp- 3 longer than in ♀ inner distal seta vestigial. P 5 (Figs 6 D, 10 A) medially fused, each with three pinnate spines and two setae; outermost seta naked, representing outer basal seta, other seta sparsely plumose. Anterior surface with fine spinule rows and pore. P 6 (Figs 6 D, 10 A) symmetrical; each member with two pinnate spines and naked outer basal seta; posterior margin with coarse spinules bi-laterally and fine spinules medially. Spermatophore large, about 100 mm in length. Ornamentation of urosome essentially as in ♀ except for more elaborate spinular patterns on first abdominal somite (Figs 6 D, 10 A). Etymology: The specific name refers to Korea, the country where the type locality of the new species is situated.	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF86FFEE7B97FAF7FB8874F3.taxon	materials_examined	Type material: Holotype ♀ (NMNH reg. no. 251942) dissected and mounted on slides. Paratypes deposited in NMNH are 2 ♀♀ (reg. no. 251943 – 944) and 3 ♂ (reg. nos. 251945 – 947) dissected and mounted on slides; 20 ♀♀ and 20 ♂♂ in alcohol (reg. no. 251973). Paratypes deposited in NHM are 1 ♀ dissected on ten slides (reg. no. 2003.808), 1 ♂ dissected on seven slides (reg. no. 2003.809); 24 ♀♀ and 13 ♂♂ in alcohol (reg nos. 2003.771 – 807) Type locality: Stn five in a small river discharging into Kwangyang Bay, South Korea (34 ∞ 57.1 ¢ N, 127 ∞ 36.4 ¢ E), salinity 11.10 ‰ (see Ohtsuka et al., 1992). Additional material: (1) Taehwa River estuary, Ulsan, South Korea; leg. C. Y. Chang, 31 January 1987; 1 ♀ and 1 ♂ in alcohol (NHM reg. nos. 2003.812 – 813). (2) Jochean, Cheju Island, South Korea; leg. C. Y. Chang and S. J. Song, 27 October 1993; 2 ♀♀ in alcohol (NHM reg. nos. 2003.810 – 811).	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF86FFEE7B97FAF7FB8874F3.taxon	description	Body length: ♀: 500 ± 30 mm (N = 53); ♂: 450 ± 30 mm (N = 53; based on paratypes).	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF86FFEE7B97FAF7FB8874F3.taxon	discussion	Neotachidius parvus is closely related to N. coreanus and the description below is consequently restricted to differences only.	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF86FFEE7B97FAF7FB8874F3.taxon	description	Description	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF86FFEE7B97FAF7FB8874F3.taxon	materials_examined	Based on NHM paratypes (reg. nos. 2003.771 – 809).	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF86FFEE7B97FAF7FB8874F3.taxon	description	Female: Spinules around posterior margin of cephalosome and somites bearing P 2 – P 3 shorter than in N. coreanus (Fig. 11 A). Slight differences in fine surface spinulation of pedigerous somites as illustrated in Figure 11 A. Rudimentary tergite of P 1 - bearing somite less well defined. Posterior margin of P 4 - bearing somite denticulate laterodorsally but smooth dorsally; dorsolateral spinules shorter than in N. coreanus. P 5 - bearing somite with spinules around lateroventral corner of pleurotergite; lateral surface spinules distinctly shorter and more blunt than in N. coreanus (Fig. 11 C). Dorsal posterior margins of genital double-somite and free abdominal somites 2 – 3 denticulate instead of with long spinules (Fig. 11 A, C); spinules along ventral posterior margin of these somites shorter than in N. coreanus (Fig. 11 B). Paired spinule rows posterior to genital slit absent (compare with N. coreanus: Figs 1 B, 2 C); remaining two rows consisting of smaller spinules (Fig. 11 B, C). Genital field area less raised in lateral aspect (Fig. 11 C). Lateral surface ornamentation of genital double-somite less elaborate than in N. coreanus (Fig. 11 C). Anal somite with paired laterodorsal spinule rows but without spinules dorsally (Fig. 13 D). Anal operculum spinulose but spinules markedly shorter than in N. coreanus. Caudal rami (Figs 11 B, 13 D) slightly longer than wide but shorter than in N. coreanus; armature and ornamentation essentially as in N. coreanus, except dorsolateral spinule row (arrowed in Fig. 10 D) absent. Antennule (Fig. 12 A) with short apical segment, only slightly longer than segment 6. Armature as in N. coreanus. Antenna (Fig. 12 B) with spinule rows on abexopodal margin of basis and proximal endopod segment. Exopod distinctly 2 - segmented; exp- 1 shortest, with one long slender plumose seta; exp- 2 with short smooth seta fused to lateral margin and two unequal plumose setae apically; spinular ornamentation around outer distal corner of exp- 2 more elaborate than in N. coreanus. Distal endopod segment laterally with one unipinnate spine in proximal third and one smooth seta plus one unipinnate spine in middle third. Apical armature of enp- 2 consisting of one unipinnate spine and four geniculate setae; longest geniculate seta with few spinules and fused at base to short naked seta; segment with various spinule rows and surface frills as figured. Mandible. Palp with similar armature as in N. coreanus. Endopod with spinule row on anterior surface (arrowed in Fig. 5 D). Maxillule, maxilla and maxilliped as in N. coreanus. P 1 (Fig. 12 C). Most spinules on anterior surface of praecoxa and coxa and around distal margin of basis distinctly shorter than in N. coreanus. Inner basal seta more slender and longer, reaching beyond distal margin of enp- 2. Rami as in N. coreanus except for inner distal element of enp- 3 (arrowed in Fig. 12 C) being long, plumose and setiform instead of pinnate and spiniform. P 2 – P 4 (Figs 12 D, 13 A) as in N. coreanus except for (a) intercoxal sclerites with spinules anteriorly but not posteriorly; (b) long spinules on anterior surface of coxa absent; (c) spinules around distal margin of basis uniform in size; (d) posterior spinules on P 4 coxa absent, and (e) P 4 exp- 3 with only one spinule row on posterior surface. P 5 (Fig. 13 C) longer and with outer concavity less pronounced than in N. coreanus; about 1.40 times as long as maximum width; spinule pattern on anterior surface and along inner margin different (as illustrated in Fig. 13 C); apical seta smooth instead of plumose; spines more slender than in N. coreanus. Male. Sexually dimorphic in size, urosome ornamentation, antennule, P 2 endopod, P 3 exopod, P 5 and P 6. Antennule (Figs 14 A, 15 A – D) as in N. coreanus except for two differences on segment 6: (a) multicuspidate process (Figs 14 A, 15 B; b in Fig. 15 D) less pronounced and typically with five cusps, and (b) cylindrical process adjacent to longitudinally ribbed element (a in Fig. 15 D) with two spinulose elements (ventralmost smooth in N. coreanus; arrowed in Fig. 14 D). Armature formula: 1 - [1 pinnate], 2 - [1 pinnate], 3 - [6 bare + 5 pinnate], 4 - [6 bare + 2 pinnate + ae], 5 - [2 pinnate], 6 - [8 bare + 4 pinnate + 1 striated element + (1 + ae)], 7 - [12 + 2 modified + acrothek]. P 2 endopod (Figs 13 B, 16 B). Enp- 1 comparatively longer than in N. coreanus with outer distal corner not spinous; spinules along outer margin longer, those of inner distal corner shorter than in N. coreanus. Middle segment transversally enlarged but markedly shorter than in N. coreanus; outer margin distinctly convex; both inner setae markedly shorter than in N. coreanus. Enp- 3 small (Fig. 16 B), with row of long setules on anterior surface covering spinous apophysis of enp- 2; outer distal seta strongly reduced, represented by a short and blunt, basally fused element (arrowed in Fig. 13 B). P 3 exopod (Fig. 12 E) more robust than in N. coreanus, with exp- 2 being distinctly shorter; inner setae of exp- 3 shorter. P 3 endopod about as long as in N. coreanus but enp- 3 proportionally longer. P 5 (Fig. 14 B, C) medially fused with medial incision more pronounced than in N. coreanus; each with three serrate spines and two naked setae; middle and inner spines shorter than in N. coreanus; anterior surface spinules absent; spinules around midventral distal margin coarser than in N. coreanus. P 6 (Fig. 14 B, C) symmetrical; each member with two serrate spines and naked outer basal seta; spinules around medial distal margin uniform in size and coarser than in N. coreanus. Ornamentation of urosome essentially as in N. coreanus except for size of spinules (Fig. 14 B, C). Variability: The females from Cheju Island were larger in size (575 – 579 mm).	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF86FFEE7B97FAF7FB8874F3.taxon	etymology	Etymology: The specific name is derived from the Latin parvus, meaning small, and alludes to the small size of the present species.	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
038387C0FF91FFE578A0FDE9FDF575FC.taxon	diagnosis	Diagnosis: Tachidiidae. Condition of rostrum, integumental windows and mouthparts unconfirmed. Genital and first abdominal somites fused in ♀ original segmentation marked by transverse surface ridge dorsally and laterally; midventral copulatory pore positioned near posterior margin of genital double-somite (after Song & Chang (1995: fig. 1 b )). Anal operculum spinulose. Caudal ramus setae IV – V well developed and pinnate. Sexual dimorphism in antennule, P 2 endopod, P 3 exopod (?), P 5, P 6 and urosomal segmentation. Antennule with numerous pinnate setae / spines; 7 - segmented in both sexes; chirocer in ♂, with aesthetascs on segments 4, 6 and 7. Antenna with distinctly 2 - segmented exopod; exp- 1 with one seta, exp- 2 with 0 – 1 lateral and two apical setae; lateral endopodal spine proximally displaced. Maxilliped with 1 (?) accessory seta on endopod; claw minutely pinnate. P 1 – P 4 enp- 1 of normal size and with inner seta. Rami 3 - segmented in P 1 – P 4. P 1 exp- 3 with two outer spines, enp- 3 with two inner setae. P 3 enp- 3 with five setae / spines. P 4 enp- 2 with one inner seta. Armature formula as follows: Exopod Endopod P 1 0.1.122 1.1.221 P 2 1.1.222 1.2.221 P 3 1.1.222 1.2.221 P 4 1.1.122 1.1.221 P 2 ♂ enp- 2 with outwardly directed spinous apophysis; enp- 3 small, anterior surface without transverse spinular comb, outer spine and outer distal seta rudimentary, inner setae well developed. P 3 exopod ♂ presumably sexually dimorphic as in Neotachidius and Tachidius. P 5 ♀ slightly bilobate, separating outer lobe from endopodal lobe; outer lobe with basal seta and four exopodal elements (one seta, three spines); endopodal lobe with four pinnate spines. P 5 ♂ medially fused (?); each with four spines and two setae. P 6 ♀ represented by opercula closing off common genital slit, each with one seta. P 6 ♂ symmetrical; each member with two pinnate spines and naked outer basal seta. Free-living. Freshwater or brackish habitats. Type species: Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964 = Sinotachidius vicinospinalis (Shen & Tai, 1964) comb. nov. Species inquirenda: Tachidius discipes Giesbrecht, 1881 sensu Song & Chang (1995). Etymology: The genus name is derived from the type genus Tachidius and the prefix sino, referring to the country of origin of the type species. According to Shen (1979) S. vicinospinalis has been recorded from brackish and freshwater habitats in both Guangdong and Fujian Provinces. Ovigerous females were encountered in April	en	Huys, Rony, Ohtsuka, Susumu, Conroy-Dalton, Sophie, Kikuchi, Yoshiaki (2005): Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964. Zoological Journal of the Linnean Society 143 (1): 133-159, DOI: 10.1111/j.1096-3642.2004.00148.x, URL: http://dx.doi.org/10.1111/j.1096-3642.2004.00148.x
