taxonID	type	description	language	source
0396422EFFE2FF89FE29871A827AF68C.taxon	description	urn: lsid: zoobank. org: act: FFFC 2 C 6 D- 4 E 4 C- 4610 - B 34 B- 25 D 21 B 7 D 3942 Figs 1 – 15, 25	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFE2FF89FE29871A827AF68C.taxon	diagnosis	Diagnosis Male Apodemes of ACG curved hook-shaped, and posterior margin of Cx-IV almost straight. Anterior margin of genital plate slightly indented, posterior margin slightly convex, three pairs of acetabula forming an obtuse triangle. V 1 separated from V 2, excretory pore smooth. Sword seta on P- 4 at same level of proximoventral hair. I-L- 6 thick at base, tapering distally. Female Similar to male. Ac in weakly curved line, Ac 2 at middle of Ac 1 and Ac 3. Palp more slender than in male.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFE2FF89FE29871A827AF68C.taxon	etymology	Etymology The new species is named after the heart-like genital plate of the male.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFE2FF89FE29871A827AF68C.taxon	materials_examined	Type material Holotype P. R. CHINA • ♂; Hainan Province, Qionghai City, Longjiang Town; 19.1730 ° N, 110.3459 ° E; 4 m a. s. l.; 11 Apr. 2023; Hai-Tao Li, Yu-Lin Zheng and Yu-Hao Zhang leg.; main river (Wanquan River) with wide surface, slowly flowing, with sandy soil and humus on bottom; slide no. HN-HY- 2023041101; GUGC. Paratypes P. R. CHINA • 3 ♂♂, 3 ♀♀; same data as for holotype; slides nos. HN-HY- 2023041102 to 2023041107; GUGC.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFE2FF89FE29871A827AF68C.taxon	description	Description Male (n = 4) Idiosoma soft and oval; O 1 between A 1 and A 2, but closer to A 1, O 2 between D 1 and at same level of D 1; all slit organs visible, So 1 near A 2, So 2 at same level of D 1 and O 2, So 3 at same level of D 2, So 4 close to L 4, So 5 behind of D 4 (Figs 2 A, 6 A). ACG fused together and with suture line, apodemes of ACG curved hook shape; PCG separated, posterior margin of Cx-IV almost straight, C 4 near suture line between Cx-III and Cx-IV, suture line of Cx-III and Cx-IV in medial part nearly straight (Fig. 8 A). Anterior margin of genital plate slightly indented, posterior margin slightly convex, three pairs of acetabula forming obtuse triangle, Ac 2 near Ac 1 (Fig. 9 D). V 1 separated from V 2, V 2 posterior to V 1 (Fig. 8 B), V 4 at same level of Ac 2, V 3 and V 4 arranged in inverted trapezoid; excretory pore smooth and between V 2 (Figs 2 B, 6 B). Palp five-segmented, without obvious sexual dimorphism; P- 1 short, P- 2 and P- 3 short with straight ventral margin, P- 4 with some dorsal hairs and two ventral hairs, dividing P- 4 in sectors 3: 2: 2, sword seta at same level of proximoventral hair (Figs 2 C, 9 A – B). Ventral margin of I-L- 5 slightly longer than dorsal margin, S- 1 close to S- 2 and S- 2 thickens at three-fifth position and then narrows immediately, whip-like seta at anterior distal margin; I-L- 6 thick at base, distally tapering. IV-L- 5 with swimming seta at distal margin and almost as long as IV-L- 6 (Figs 3, 10). MEASUREMENTS (measurements of paratypes in parentheses). Idiosoma L 450 (420 – 460), W 385 (371 – 386); coxal field L 245 (216 – 245), Cx-III W 263 (238 – 263), ACG IL 180 (163 – 180), mL 116 (112 – 123), W 192 (183 – 192); gnathosoma bay L 83 (68 – 83); genital field L 81 (70 – 82), W 109 (92 – 109); Ac 1 – 3 L 20 (19 – 21), 22 (20 – 22), 24 (21 – 24); chelicera L 166 (155 – 171), cheliceral claw L 43 (42 – 47), basal segment L 126 (123 – 138); gnathosoma L 136 (131 – 139); palp dL: P- 1 22 (19 – 22), P- 2 51 (48 – 54), P- 3 49 (45 – 50), P- 4 73 (67 – 74), P- 5 27 (24 – 28); leg segments: I-L- 1 dL 39 (36 – 41), I-L- 2 dL 66 (65 – 73), I-L- 3 dL 80 (74 – 84), I-L- 4 dL 125 (115 – 128), I-L- 5 dL 117 (103 – 117), HB 37 (33 – 37), I-L- 6 dL 65 (65 – 73), HB 15 (11 – 15), S- 1 L 61 (57 – 61), W 6 (5 – 6), S- 2 L 57 (55 – 59), W 7 (6 – 8); dL: II-L- 1 39 (37 – 43), II-L- 2 62 (55 – 71), II-L- 3 68 (60 – 69), II-L- 4 89 (76 – 90), II-L- 5 98 (86 – 104), II-L- 6 85 (82 – 91); dL: III-L- 1 42 (36 – 46), III-L- 2 62 (61 – 66), III-L- 3 67 (64 – 69), III-L- 4 96 (87 – 96), III-L- 5 112 (101 – 112), III-L- 6 108 (95 – 108); dL: IV-L- 1 88 (78 – 88), IV-L- 2 85 (71 – 85), IV-L- 3 106 (102 – 109), IV-L- 4 122 (118 – 127), IV-L- 5 137 (125 – 139), IV-L- 6 134 (118 – 134). Female (n = 3) Similar to male. Ac in weakly curved line, Ac 2 at middle of Ac 1 and Ac 3, V 3 at same level of pregenital sclerite, distance between pregenital sclerite and postgenital sclerite longer, V 3 and V 4 arranged in trapezoid; excretory pore slightly posterior to level of V 2. Palp more slender than in male (Figs 4 – 5, 7, 12 – 15). MEASUREMENTS (measurements of paratypes in parentheses). Idiosoma L 783 (722 – 807), W 621 (621 – 678); coxal field L 254 (254 – 293), Cx-III W 327 (327 – 363), ACG IL 176 (176 – 212), mL 101 (101 – 115), W 223 (223 – 259); gnathosoma bay L 97 (97 – 120); gonopore L 141 (99 – 141), pregenital sclerite L 79 (61 – 79), postgenital sclerite L 37 (33 – 40); Ac 1 – 3 L 22 (22 – 26), 28 (23 – 28), 25 (25 – 28); chelicera L 219 (219 – 240), cheliceral claw L 58 (58 – 66), basal segment L 175 (175 – 186); gnathosoma L 146 (146 – 184); palp dL: P- 1 26 (25 – 26), P- 2 64 (64 – 77), P- 3 65 (65 – 74), P- 4 85 (85 – 96), P- 5 31 (31 – 34); leg segments: I-L- 1 dL 43 (43 – 48), I-L- 2 dL 80 (80 – 92), I-L- 3 dL 95 (95 – 104), I-L- 4 dL 148 (148 – 168), I-L- 5 dL 131 (131 – 143), HB 44 (44 – 49), I-L- 6 dL 78 (77 – 85), HB 12 (11 – 13), S- 1 L 63 (63 – 71), W 6 (6 – 7), S- 2 L 59 (59 – 68), W 8 (8 – 10); dL: II-L- 1 48 (48 – 56), II-L- 2 70 (70 – 88), II-L- 3 78 (78 – 87), II-L- 4 107 (107 – 116), II-L- 5 115 (115 – 126), II-L- 6 94 (94 – 104); dL: III-L- 1 48 (48 – 57), III-L- 2 71 (71 – 91), III-L- 3 79 (79 – 87), III-L- 4 109 (109 – 125), III-L- 5 125 (125 – 140), III-L- 6 109 (109 – 122); dL: IV-L- 1 87 (87 – 106), IV-L- 2 84 (84 – 98), IV-L- 3 121 (121 – 133), IV-L- 4 146 (146 – 163), IV-L- 5 156 (156 – 177), IV-L- 6 151 (151 – 154).	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFE2FF89FE29871A827AF68C.taxon	discussion	Remarks The new species Atractides (Atractides) cardiacus Zhang & Guo sp. nov. is similar to Atractides putihi Wiles, 1991 in the following points: (1) the posterior margin of Cx-IV almost straight; (2) V 1 separated from V 2; (3) excretory pore smooth. But A. (A.) cardiacus differs from A. putihi in the following points: (1) the posterior margin of the new species genital field is narrow, but wider in A. putihi; (2) the gonopore of the male new species is short but longer in A. putihi (Pešić & Smit 2009).	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFEFFF91FE5A85478330F13F.taxon	description	urn: lsid: zoobank. org: act: 00 A 65086 - 590 B- 431 B-AB 50 - F 7 C 9 A 01 B 8 CA 8 Figs 16 – 18	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFEFFF91FE5A85478330F13F.taxon	diagnosis	Diagnosis The apodemes of ACG almost transverse. Pregenital sclerite relatively large, V 1 separated fro V 2, V 3 at same level of pregenital sclerite and near Cx-IV, excretory pore smooth. P- 4 with straight ventral margin and two ventral hairs dividing it in 2: 1: 2, sword seta at same level of distoventral hair.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFEFFF91FE5A85478330F13F.taxon	etymology	Etymology The new species is named after the Foding Mountain, where the specimens were collected.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFEFFF91FE5A85478330F13F.taxon	materials_examined	Type material Holotype P. R. CHINA • ♀; Guizhou Province, Tongren City, Foding Mountain; 27.3113 ° N, 108.1363 ° E; 693 m a. s. l.; 19 Jun. 2023; Ri-Xin Jiang, Ping Li and Lan Jia leg.; waterfall in the mountain, with fast running water, and many plants along the shore; slide no. GZ-HY- 2023061901; GUGC. Paratype P. R. CHINA • 1 ♀; same data as for holotype; slide no. GZ-HY- 2023061902; GUGC.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFEFFF91FE5A85478330F13F.taxon	description	Description Female (n = 2) Idiosoma soft and oval, frontal edge slightly concave; O 1 between A 1 and A 2, O 2 between D 1 and slightly front of D 1; all slit organs visible, So 1 near A 2, So 2 at the middle of L 1 and L 2, So 3 at same level of D 2, So 4 near L 4, So 5 behind of D 4 (Figs 16 A, 18 A). ACG fused and with suture line, apodemes of ACG almost transverse; PCG separated. Pregenital sclerite relatively large, three pairs of acetabula in weakly curved line, Ac 3 largest. V 1 separated from V 2, V 3 at same level of pregenital sclerite and near Cx-IV, V 4 at horizontal line between Ac 1 and Ac 2, V 3 and V 4 forming trapezoid; excretory pore smooth and between V 2 (Figs 16 B, 18 B). Palp five-segmented; P- 1 short, P- 2 and P- 3 without projection, P- 4 with straight ventral margin and two ventral hairs, dividing P- 4 in 2: 1: 2, sword seta at same level of distoventral hair (Fig. 16 C). Ventral margin of I-L- 5 as long as dorsal margin, S- 1 close to S- 2, S- 2 longer and thicker than S- 1, ventrally curved whip-like seta at end of I-L- 5, and near dorsal slide; I-L- 6 stout, thick at its base, tapering towards end (Fig. 17). MEASUREMENTS (measurements of paratypes in parantheses). Idiosoma L 495 (443), W 408 (368); coxal field L 295 (264), Cx-III W 252 (289), ACG IL 161 (179), mL 104 (116), W 210 (226); gnathosoma bay L 80 (86); gonopore L 95 (95), pregenital sclerite L 76 (65), postgenital sclerite L 37 (30); Ac 1 – 3 L 31 (33), 23 (31), 29 (34); chelicera L 125 (114), cheliceral claw L 37 (39), basal segment L 94 (96); gnathosoma L 107 (131); palp dL: P- 1 22 (25), P- 2 46 (49), P- 3 54 (59), P- 4 57 (63), P- 5 23 (23); leg segments: I-L- 1 dL 42 (49), I-L- 2 dL 60 (68), I-L- 3 dL 78 (83), I-L- 4 dL 106 (113), I-L- 5 dL 117 (124), HB 31 (35), I-L- 6 dL 61 (62), HB 12 (14), S- 1 L 46 (53), W 6 (8), S- 2 L 51 (51), W 7 (12); dL: II-L- 1 40 (45), II-L- 2 50 (56), II-L- 3 62 (66), II-L- 4 81 (85), II-L- 5 84 (96), II-L- 6 83 (88); dL: III-L- 1 44 (44), III-L- 2 60 (65), III-L- 3 69 (76), III-L- 4 97 (111), III-L- 5 102 (112), III-L- 6 90 (105); dL: IV-L- 1 85 (93), IV-L- 2 79 (78), IV-L- 3 110 (117), IV-L- 4 129 (137), IV-L- 5 132 (143), IV-L- 6 115 (130).	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFEFFF91FE5A85478330F13F.taxon	discussion	Remarks This new species is similar to Atractides (Atractides) cardiacus Zhang & Guo sp. nov. in the following characters: (1) V 1 separated from V 2; (2) excretory pore smooth; (3) I-L- 6 stout, thick at its base, tapering towards the end. However, the new species differs from A. (A.) cardiacus in the following aspects: (1) sword seta of P- 4 at the same level of distoventral hair in the new species, but at the same level of proximoventral hair in A (A.) cardiacus; (2) ACG and PCG occupy half of the venter in the new species, but ACG and PCG of the female A (A.) cardiacus occupy one third of the ventral view; (3) excretory pore between V 2 in the new species, but slightly behind the parallel line of V 2 in the female A (A.) cardiacus.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF2FF95FE2B813284E6F791.taxon	description	Figs 19 – 21, 25	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF2FF95FE2B813284E6F791.taxon	diagnosis	Diagnosis Genital field with four pairs of acetabula, V 1 fused with V 2, excretory pore surrounded by sclerotized ring and between V 1 and V 2. P- 4 with numerous dorsal hairs and two hair-like ventral setae, sword seta near distoventral hair. I-L- 5 thicken from base to end, S- 2 longer than S- 1, both with blunt tips and similar in shape; I-L- 6 curved, and distally little thicker than base.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF2FF95FE2B813284E6F791.taxon	materials_examined	Material examined P. R. CHINA • 1 ♀; Hainan Province, Qionghai City, Longjiang Town; 19.1730 ° N, 110.3459 ° E; 4 m a. s. l.; 11 Apr. 2023; Hai-Tao Li, Yu-Lin Zheng and Yu-Hao Zhang leg.; main river (Wanquan River) with wide surface, slowly flowing, with sandy soil and humus on bottom; slide no. HN-HY- 2023041108; GUGC.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF2FF95FE2B813284E6F791.taxon	description	Description Female (n = 1) Idiosoma oval; O 1 between A 1 and A 2 but closer to A 1, O 2 between D 1 and surrounded by pair of platelets; dorsum with three pairs of muscle attachments: pair of muscle attachments between L 2, pair of muscle attachments near D 2, and pair of muscle attachments between D 3; all slit organs visible, So 1 near A 1, So 2 at same level of D 1, So 3 between L 2 and L 3 but closer to L 3, So 4 near L 4, So 5 behind of D 4 (Figs 19 A, 21 A). ACG fused and with suture line, medial posterior margin of ACG ligulate, apodemes of ACG strong and horn-like; PCG separated, and suture line of Cx-III and Cv-IV nearly straight. Genital field with four pairs of acetabula, pregenital sclerite longer than postgenital sclerite. V 1 fused to V 2, V 4 at same level of Ac 1, V 3 near pregenital sclerite, pair of sclerites anterior to pregenital sclerite and approximately between V 3, V 3 and V 4 forming trapezoid; excretory pore surrounded by sclerotized ring and between V 1 and V 2 (Figs 19 B, 21 B). Palp five-segmented and without obvious sexual dimorphism; P- 2 short and stout with straight ventral margin, P- 3 straight, P- 4 with numerous dorsal hairs and two hair-like ventral setae, ventral sectors 3: 2: 3, sword seta near distoventral hair (Fig. 19 C). I-L- 5 thickening from base to end, S- 2 longer than S- 1, both with blunt tips and similar in shape; I-L- 6 curved, and end little thicker than base (Fig. 20). MEASUREMENTS. Idiosoma L 745, W 579; coxal field L 330, Cx-III W 390, ACG IL 228, mL 132, W 272; gnathosoma bay L 122; gonopore L 107, pregenital sclerite L 142, postgenital sclerite L 52; Ac 1 – 4 L 29, 29, 29, 30; chelicera L 288, cheliceral claw L 93, basal segment L 202; gnathosoma L 218; palp dL: P- 1 30, P- 2 66, P- 3 63, P- 4 97, P- 5 36; leg segments: I-L- 1 dL 41, I-L- 2 dL 78, I-L- 3 dL 90, I-L- 4 dL 131, I-L- 5 dL 130, HB 39, I-L- 6 dL 98, HB 23, S- 1 L 52, W 5, S- 2 L 51, W 5; dL: II-L- 1 55, II-L- 2 73, II-L- 3 81, II-L- 4 108, II-L- 5 119, II-L- 6 114; dL: III-L- 1 56, III-L- 2 69, III-L- 3 85, III-L- 4 122, III-L- 5 148, III-L- 6 129; dL: IV-L- 1 121, IV-L- 2 91, IV-L- 3 137, IV-L- 4 170, IV-L- 5 187, IV-L- 6 159.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF2FF95FE2B813284E6F791.taxon	distribution	Distribution China (Hainan Province).	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF2FF95FE2B813284E6F791.taxon	discussion	Remarks Due to the genital field with four pairs of acetabula and similar shape of the palp, chelicera and gnathosoma, the specimen from Hainan Province matches the description of A. (A.) bitergumus Zhang & Guo, 2023. The collection site is very close to type locality, all in Hainan Province (Zhang et al. 2023). This is the first description of the female.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF6FF99FE4D80638485F539.taxon	description	Figs 22 – 25	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF6FF99FE4D80638485F539.taxon	diagnosis	Diagnosis O 2 slightly anterior to D 1. Genital field with three pairs of acetabula forming triangle, V 1 separated from V 2, excretory pore smooth and slightly posterior to level of V 1 and V 2. P- 4 ventral margin straight and divided by two ventral hairs in sectors 3: 2: 3, sword seta near distoventral hair, P- 5 without lateral cheeks. I-L- 5 thickens from base to end, S- 1 and S- 2 both with blunt tips and similar in shape; I-L- 6 slightly straight and end little thicker than base.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF6FF99FE4D80638485F539.taxon	materials_examined	Material examined P. R. CHINA • 1 ♂, 2 ♀♀; Hainan Province, Lingshui Li Autonomous County, Diaoluo Mountain National Forest Park; 18.6683 ° N, 109.9227 ° E; 84 m a. s. l.; 13 Apr. 2023; Hai-Tao Li, Yu-Lin Zheng and Yu-Hao Zhang leg.; main river (Diaoluo River) 40 – 50 cm deep, with sand and rotten leaves on bottom, plants around, shore with helophytes (Fig. 25 B); slide nos. HN-HY- 2023041301 to 2023041303; GUGC.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF6FF99FE4D80638485F539.taxon	description	Description Female (n = 2) Idiosoma oval, O 1 posterior to A 1, O 2 slightly anterior to D 1 and on platelets; all slit organs visible, So 1 near A 2, So 2 at same level of D 1, So 3 at same level of D 2, So 4 located in front of L 4, So 5 behind of D 4 and out (Figs 22 A, 24 A). ACG fused and with suture line, apodemes of ACG strong and horn-like, and interspace between two apodemes; PCG separated, and suture line of Cx-III and Cv-IV nearly straight, C 4 near suture line between Cx-III and Cv-IV. Genital field with three pairs of acetabula forming triangle, V 1 separated from V 2, V 3 close to PCG, V 4 at same level of pregenital sclerite, V 3 and V 4 forming trapezoid, excretory pore smooth and slightly posterior to level of V 1 and V 2 (Figs 22 B, 24 B). Palp five-segmented; P- 1 elongated, P- 2 and P- 3 ventral margins more or less straight; P- 4 with numerous dorsal hairs, ventral margin straight and divided by two ventral hairs in sectors 3: 2: 3, sword seta near to distoventral hair, P- 5 without lateral cheeks (Fig. 22 C). I-L- 5 thickens from base to end, S- 1 and S- 2 both with blunt tips and similar in shape; I-L- 6 slightly straight and end little thicker than base (Fig. 23). MEASUREMENTS (measurements of other specimens in parentheses). Idiosoma L 730 (746), W 578 (538); coxal field L 384 (366), Cx-III W 408 (410), ACG IL 271 (269), mL 126 (139), W 293 (280); gnathosoma bay L 177 (158); gonopore L 95 (107), pregenital sclerite L 97 (101), postgenital sclerite L 49 (56); Ac 1 – 3 L 30 (33), 36 (34), 29 (34); chelicera L 365 (357), cheliceral claw L 99 (98), basal segment L 291 (283); gnathosoma L 271 (251); palp dL: P- 1 71 (60), P- 2 69 (70), P- 3 73 (64), P- 4 107 (100), P- 5 33 (32); leg segments: I-L- 1 dL 58 (57), I-L- 2 dL 84 (74), I-L- 3 dL 100 (93), I-L- 4 dL 141 (129), I-L- 5 dL 132 (122), HB 37 (35), I-L- 6 dL 108 (100), HB 23 (22), S- 1 L 39 (37), W 4 (4), S- 2 L 41 (39), W 5 (4); dL: II-L- 1 64 (58), II-L- 2 72 (72), II-L- 3 91 (83), II-L- 4 117 (104), II-L- 5 126 (114), II-L- 6 117 (109); dL: III-L- 1 62 (61), III-L- 2 95 (81), III-L- 3 92 (89), III-L- 4 125 (114), III-L- 5 143 (139), III-L- 6 140 (135); dL: IV-L- 1 137 (125), IV-L- 2 106 (97), IV-L- 3 149 (143), IV-L- 4 177 (171), IV-L- 5 192 (186), IV-L- 6 167 (168).	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF6FF99FE4D80638485F539.taxon	distribution	Distribution China (Hainan Province).	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
0396422EFFF6FF99FE4D80638485F539.taxon	discussion	Remarks In this study, we collected one male and two females from Diaoluo Mountain National Forest Park, Lingshui Li Autonomous County, Hainan Province, and found that the male matches the description of the male of A. (T.) tergumus. Moreover, the collection site is very close to the site where A. (T.) tergumus was collected. We believe the females we collected belong to A. (T.) tergumus, and this is the first description to the female of the species.	en	Zhang, Yu-Hao, Li, Hai-Tao, Hu, Zhan-Yu, Guo, Jian-Jun (2025): Two new species in the genus Atractides Koch, 1837 (Acari: Hydrachnidiae: Hygrobatidae), with the first descriptions of the female of two species from China. European Journal of Taxonomy 976: 47-76, DOI: 10.5852/ejt.2025.976.2775, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2775/12685
