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Atractides (Atractides) smiti Zhang, Li & Guo sp. nov. urn:lsid:zoobank.org:act: D2DA763A-88E0-4432-810F-76BC5FBF1F3B Figs 4–5 Diagnosis Muscle attachments between D 3 sclerotized. I-L-5 longish, S-1 and S-2 both with blunt tips and with a narrow setal interspace between them; I-L-6 curved. Ac in an obtuse triangle; V1 fused to V2, excretory pore surrounded by sclerotized ring. P-2 and P-3 ventral margin slightly straight; P-4 divided by two ventral hairs in sectors 3:3:2, sword seta at the middle of P-4. Etymology The species is named after Dr Harry Smit in appreciation of his contributions to the taxonomy of water mites. Type material Holotype CHINA • ♂; Qinghai Province, Huangnan Tibetan Autonomous Prefecture, Zeku County, Maixiu Town; 35°18′64′′ N, 101°52′32′′ E; 3201 m a.s.l.; 17 Jul. 2020; Hai-Tao Li leg.; running water; GUGC, Slide No. QH-HY-2020071706. Description Male Idiosoma oval; O2 and L1 at the same level; setae of D1 about two thirds of the distance from D1 to D2; setae of D 2 reaching to the level of D 3 ; muscle attachments between D 3 sclerotized; all setae surrounded by sclerites; So 1 in front of A 2 , So 2 at the same level as D 1 , So 3 near D 2 , So 4 at the same level as D 3 , So 5 behind D 4 (Fig. 4A). ACG fused together and with a suture, apodemes of ACG reaching to Cx-III; genital field with a development sclerotization, the anterior part of Ap with a projection, Ac in an obtuse triangle, Ac2 near Ac3 rather than Ac1, Ac3 the biggest; V1 fused to V2, V3 and V4 forming a trapezoid, V4 at the same level as the anterior of acetabular plate; excretory pore surrounded by sclerotized ring (Fig. 4B). Palp five-segmented; P-2 and P-3 ventral margins slightly straight; P-4 with numerous dorsal hairs, and divided by two ventral hairs in sectors 3:3:2, sword seta at the middle of P-4 (Fig. 4E). I-L-5 longish, S-1 and S-2 both with blunt tips and with a narrow setal interspace between them; I-L-6 curved (Fig. 5A). Measurements Male (n = 1) Idiosoma L 513, W 369; coxal field L 264, Cx-III W 164, ACG IL 175, mL 103, W 216; infracapitular bay L 97; genital field L 131, Ac1–3 L 26, 28, 27; chelicera L 145; infracapitulum L 125; palp dL: P-1 23, P-2 49, P-3 49, P-4 70, P-5 26; legs segments: I-L-1 dL 38, I-L-2 dL 74, I-L-3 dL 67, I-L-4 dL 107, I-L-5 dL 122, HB 37, I-L-6 dL 72, HB 19, S-1 L 54, S-2 L 60; dL: II-L-1 32, II-L-2 61, II-L-3 57, II-L-4 82, II-L-5 85, II-L-6 91; dL: III-L-1 36, III-L-2 64, III-L-3 61, III-L-4 95, III-L-5 106, III-L-6 103; dL: IV-L-1 70, IV-L-2 83, IV-L-3 107, IV-L-4 138, IV-L-5 148, IV-L-6 129. Female Unknown. Remarks The new species Atractides (Atractides) smiti sp. nov. is similar to Atractides protendens K.O. Viets, 1955 in the following points: (1) P-2 and P-3 ventral margins slightly straight; (2) S-1 and S-2 with a narrow setal interspace between them; (3) the anterior part of Ap with a projection; (4) apodemes of ACG reaching to Cx-III. However, A. (A.) smiti differs from A. protendens in the following aspects: (1) V1 fused to V 2 in A. (A.) smiti, but not fused in A. protendens; (2) excretory pore surrounded by sclerotized ring in A. (A.) smiti, but smooth in A. protendens; (3) the I-L-6 of A. (A.) smiti more curved than that of A. protendens (Gerecke 2003)., Published as part of Zhang, Yu-Hao, Li, Hai-Tao, Li, Cai-Yun & Guo, Jian-Jun, 2022, New species of genus Atractides Koch, 1837 (Acari: Hydrachnidiae, Hygrobatidae) from Qinghai, China, pp. 121-142 in European Journal of Taxonomy 833 (1) on pages 127-129, DOI: 10.5852/ejt.2022.833.1889, http://zenodo.org/record/6958174, {"references":["Gerecke R. 2003. Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision. Zoological Journal of the Linnean Society 138 (2 - 3): 141 - 378. https: // doi. org / 10.1046 / j. 1096 - 3642.06 - 0.00051. x"]}

Atractides (Atractides) xianmiensis Zhang, Li & Guo sp. nov. urn:lsid:zoobank.org:act: FB29B7EB-1A14-450E-80E2-4795C3B299EA Figs 11–13 Diagnosis Male Dorsal muscle attachment unsclerotized. I-L-5 longish, S-1 and S-2 both with blunt tips and with a setal interspace between them; I-L-6 straight. Ac in an obtuse triangle; V 1 separated from V 2 . P-2 and P-3 with a ventral projection respectively, P-4 with numerous dorsal hairs, ventral hairs long, one at the middle of the surface, and the other one at the terminal of lateral edge, sword seta at the middle of P-4. Female Ac in a weakly curved line. P-2 with a ventral projection, P-3 ventral margin slightly convex, P-4 divided by two ventral hairs in sectors 1:1:1. Etymology The new species is named after the name of the Xianmi National Nature Reserve where the specimens were collected. Type material Holotype CHINA • ♂; Qinghai Province, Xianmi National Nature Reserve; 37°10′56′′ N, 102°20′03′′ E; 2949 m a.s.l.; 29 Jul. 2020; Hai-Tao Li leg.; running water; GUGC, Slide No. QH-HY-2020072910. Paratypes CHINA • 3 ♂♂; same collection data as for holotype; GUGC, Slides No. QH-HY-2020072911 to 2020072913 • 2 ♀♀; same collection data as for holotype; GUGC, Slides No. QH-HY-2020072914, 2020072915. Description Male (n = 4) Idiosoma oval, dorsal muscle attachment unsclerotized; So 1 near eye capsule; So 2 at the same level as D 1 ; So 3 at the same level as D 2 ; So 4 in front of L 4 ; So 5 behind D 4 (Fig. 11A). ACG fused together and with a suture, apodemes of ACG well developed, and reaching to Cx-III; Ac in an obtuse triangle, Ac3 biggest; V 1 separated far from V 2 , V 3 and V 4 forming a rectangle, V 4 at the same level as the anterior part of acetabular plate (Fig. 11B). Palp five-segmented; P-2 and P-3 with a ventral projection respectively, P-4 with numerous dorsal hairs, ventral hairs long, one at the middle of the surface, and the other one at the terminal of lateral edge, sword seta at the middle of P-4 (Fig. 11E). I-L-5 longish, S-1 and S-2 with blunt tips and with a setal interspace between them; I-L-6 straight (Fig. 13A). Female (n = 2) Similar to male (Fig. 12). Ac in a weakly curved line (Fig. 12B). P-2 with a ventral projection, P-3 ventral margin slightly convex, P-4 divided by two ventral hairs in sectors 1:1:1 (Fig. 11F). Measurements Male (n = 4) Idiosoma L 724 (724–896), W 605 (605–734); coxal field L 351 (351–395), Cx-III W 426 (426–483), ACG IL 251 (251–287), mL 131 (131–159), W 329 (329–372); infracapitular bay L 132 (132–160); genital field L 131 (131–144), Ac1–3 L 39 (36–41), 32 (32–43), 36 (36–46); chelicera L 227 (227–267); infracapitulum L 207 (207–239); palp dL: P-1 30 (30–37), P-2 69 (69–80), P-3 76 (76–89), P-4 107 (107–121), P-5 34 (33–34); Legs segments: I-L-1 dL 47 (47–56), I-L-2 dL 107 (107–126), I-L-3 dL 110 (110–125), I-L-4 dL 165 (165–191), I-L-5 dL 188 (188–214), HB 42 (42–46), I-L-6 dL 145 (145–160), HB 34 (32–34), S-1 L 67 (67–73), S-2 L 58 (58–65); dL: II-L-1 55 (47–59), II-L-2 94 (94–108), II-L-3 100 (100–113), II-L-4 141 (141–162), II-L-5 161 (161–184), II-L-6 154 (154–174); dL: III-L-1 54 (51– 63), III-L-2 93 (93–112), III-L-3 109 (109–124), III-L-4 166 (166–191), III-L-5 194 (194–226), III-L-6 178 (178–200); dL: IV-L-1 131 (129–137), IV-L-2 154 (154–161), IV-L-3 187 (187–211), IV-L-4 240 (240–274), IV-L-5 260 (260–303), IV-L-6 224 (224–246). Female (n = 2) Idiosoma L 925 (1215), W 754 (1042); coxal field L 403 (422), Cx-III W 515 (576), ACG IL 303 (323), mL 133 (131), W 405 (403); infracapitular bay L 180 (179); gonopore L 145 (190), Ap L 156 (156), Ac1–3 L 49 (48), 43 (45), 43 (46); chelicera L 291 (297); infracapitulum L 269 (268); palp dL: P-1 36 (46), P-2 84 (88), P-3 97 (103), P-4 124 (123), P-5 36 (39); legs segments: I-L-1 dL 59 (64), I-L-2 dL 122 (136), I-L-3 dL 131 (141), I-L-4 dL 193 (205), I-L-5 dL 220 (227), HB 47 (47), I-L-6 dL 165 (173), HB 39 (35), S-1 L 87 (78), S-2 L 74 (72); dL: II-L-1 64 (50), II-L-2 108 (106), II-L-3 121 (133), II-L-4 166 (180), II-L-5 188 (200), II-L-6 175 (186); dL: III-L-1 54 (68), III-L-2 114 (112), III-L-3 131 (142), III-L-4 198 (212), III-L-5 233 (241), III-L-6 208 (215); dL: IV-L-1 150 (160), IV-L-2 162 (174), IV-L-3 211 (228), IV-L-4 270 (293), IV-L-5 246 (314), IV-L-6 211 (265). Remarks The new species Atractides (Atractides) xianmiensis sp. nov. is similar to Atractides inflatus Walter, 1925 in the following points: (1) P-2 and P-3 of the male both with a ventral projection respectively; (2) V 1 not fused to V 2 ; (3) S-1 and S-2 both with blunt tips and with a setal interspace between them; (4) Ac in an obtuse triangle in the male and in a weakly curved line in the female. However, A. (A.) xianmiensis differs from A. inflatus in the following aspects: (1) apodemes of ACG in female well developed and reaching to Cx-III in A. (A.) xianmiensis, but not reaching to Cx-III in A. inflatus; (2) I-L-6 straight in A. (A.) xianmiensis, but curved in A. inflatus (Gerecke 2003)., Published as part of Zhang, Yu-Hao, Li, Hai-Tao, Li, Cai-Yun & Guo, Jian-Jun, 2022, New species of genus Atractides Koch, 1837 (Acari: Hydrachnidiae, Hygrobatidae) from Qinghai, China, pp. 121-142 in European Journal of Taxonomy 833 (1) on pages 137-139, DOI: 10.5852/ejt.2022.833.1889, http://zenodo.org/record/6958174, {"references":["Gerecke R. 2003. Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision. Zoological Journal of the Linnean Society 138 (2 - 3): 141 - 378. https: // doi. org / 10.1046 / j. 1096 - 3642.06 - 0.00051. x"]}

Atractides (Atractides) longiprojectus Zhang, Li & Guo sp. nov. urn:lsid:zoobank.org:act: A043146A-40FB-45E2-888A-3613E5A14165 Figs 9–10 Diagnosis Dorsal muscle attachment unsclerotized, setae of D 1 and D 2 significantly longer than others, setae of D 1 nearly reaching to D2, setae of D2 extending beyond D3. I-L-5 longish, S-1 and S-2 with a narrow setal interspace between them, S-1 longer than S-2. I-L-6 straight. Ac in a weakly curved line; V 1 separated from V 2 . P-2 with an unobvious ventral projection; P-3 ventral margin slightly convex; the ventral edge of P-4 divided by two long hairs in 2:1:2, sword seta at two thirds of P-4. Etymology The Latin prefix ‘ longi -’ means long, ACG of the female of this new species is with a particularly long hind projection. Type material Holotype CHINA • ♀; Qinghai Province, Haibei Tibetan Autonomous Prefecture, Menyuan Hui Autonomous County, Quankou Town; 37°31′31′′ N, 101°81′12′′ E; 2691 m a.s.l.; 29 Jul. 2020; Hai-Tao Li leg.; running water; GUGC, Slide No. QH-HY-2020072907. Paratypes CHINA • 2 ♀♀; same collection data as for holotype; GUGC, Slides No. QH-HY-2020072908, 2020072909. Description Female (n = 3) Idiosoma oval, dorsal muscle attachment unsclerotized; O2 and D1 at the same level; setae of D1 and D 2 significantly longer than others, setae of D 1 nearly reaching to D 2 , setae of D 2 extending beyond D 3 ; all slit organs visible, So 1 near the eye capsule, So 2 at the same level as D 1 , So 3 near D 2 , So 4 in front of L 4 , So 5 behind of D 4 (Fig. 9A). Coxal group occupying a half of ventral surface, projections from ACG extending to Cx-IV; Ac in a weakly curved line; V1 separated from V2; V3 and V4 forming a rectangle, V4 at the same level as the anterior of acetabular plate (Fig. 9B). Palp five-segmented; P-2 with an unobvious ventral projection; P-3 ventral margin slightly convex; P-4 with numerous dorsal hairs, the ventral edge of P-4 divided by two long hairs in 2:1:2, sword seta at two thirds of P-4 (Fig. 9E). I-L-5 longish, S-1 and S-2 with a narrow setal interspace, S-1 longer than S-2. I-L-6 straight (Fig. 10A). Measurements Female (n = 3) Idiosoma L 530 (530–663), W 419 (419–547); coxal field L 320 (320–361), Cx-III W 353 (353–406), ACG IL 244 (244–295), mL 126 (126–163), W 297 (296–336); infracapitular bay L 143 (133–151); gonopore L 98 (98–118), Ap L 120 (118–128), Ac1–3 L 35 (35–41), 39 (39–45), 30 (30–38); chelicera L 251 (251–275); infracapitulum L 227 (226–239); palp dL: P-1 35 (32–35), P-2 68 (68–79), P-3 75 (75–82), P-4 106 (106–110), P-5 27 (27–31); legs segments: I-L-1 dL 45 (45–53), I-L-2 dL 103 (100– 113), I-L-3 dL 103 (96–112), I-L-4 dL 153 (152–163), I-L-5 dL 166 (166–180), HB 37 (37–39), I-L-6 dL 134 (134–144), HB 34 (34–37), S-1 L 57 (57–72), S-2 L 47 (46–54); dL: II-L-1 53 (53–56), II-L-2 96 (89–104), II-L-3 96 (92–102), II-L-4 130 (130–141), II-L-5 140 (140–153), II-L-6 141 (140–152); dL: III-L-1 53 (51–59), III-L-2 87 (79–106), III-L-3 101 (101–115), III-L-4 154 (153–168), III-L-5 178 (170–189), III-L-6 163 (160–178); dL: IV-L-1 108 (108–120), IV-L-2 141 (135–141), IV-L-3 182 (178–195), IV-L-4 219 (219–239), IV-L-5 246 (234–255), IV-L-6 204 (197–218). Male Unknown. Remarks The new species Atractides (Atractides) longiprojectus sp. nov. is similar to Atractides inflatipalpis K. Viets, 1950 in the following points: (1) V 1 separated from V 2 ; (2) S-1 longer than S-2; (3) P-2 with an unobvious ventral projection. However, A. (A.) longiprojectus differs from A. inflatipalpis in the following aspects: (1) P-3 ventral margin slightly convex in A. (A.) longiprojectus, but straight in A. inflatipalpis; (2) I-L-6 straight in A. (A.) longiprojectus, but curved in A. inflatipalpis; (3) the pregenital sclerite of A. inflatipalpis in female much bigger than A. (A.) longiprojectus (Gerecke 2003)., Published as part of Zhang, Yu-Hao, Li, Hai-Tao, Li, Cai-Yun & Guo, Jian-Jun, 2022, New species of genus Atractides Koch, 1837 (Acari: Hydrachnidiae, Hygrobatidae) from Qinghai, China, pp. 121-142 in European Journal of Taxonomy 833 (1) on pages 133-134, DOI: 10.5852/ejt.2022.833.1889, http://zenodo.org/record/6958174, {"references":["Gerecke R. 2003. Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision. Zoological Journal of the Linnean Society 138 (2 - 3): 141 - 378. https: // doi. org / 10.1046 / j. 1096 - 3642.06 - 0.00051. x"]}

Atractides (Atractides) menyuanensis Zhang, Li & Guo sp. nov. urn:lsid:zoobank.org:act: C836E7CF-0A50-4334-AA1D-DDE500DDBCF8 Figs 6–8 Diagnosis Dorsal muscle attachment unsclerotized. I-L-5 longish, S-1 close to S-2. I-L-6 curved. Ac in an obtuse triangle; V 1 separated from V 2 . P-2 ventral margin slightly convex; P-3 ventral margin nearly straight; two long hairs on the ventral surface of P-4 near the base, sword seta near the base. Ac in a weakly curved line in female. Etymology The new species is named after the name of Menyuan Hui Autonomous County where the specimens were collected. Type material Holotype CHINA • ♂; Qinghai Province, Haibei Tibetan Autonomous Prefecture, Menyuan Hui Autonomous County; 37°31′31′′ N, 101°21′09′′ E; 2427 m a.s.l.; 29 Jul. 2020; Hai-Tao Li leg.; running water; GUGC, Slide No. QH-HY-2020072901. Paratypes CHINA • 5 ♀♀; same collection data as for holotype; GUGC, Slides No. QH-HY-2020072902 to 2020072906. Description Male (n = 1) Idiosoma oval, dorsal muscle attachment unsclerotized; all slit organs visible, So 1 near the eye capsule, So 2 near L 2 , So 3 at the level of D 2 , So 4 at the level of D 3 , So 5 on the outside of D 4 (Fig. 6A). ACG fused together and with a suture, PCG separated; apodemes from ACG not reaching to PCG; Ac in an obtuse triangle; V 1 separated from V 2 ; V 3 and V 4 forming a trapezoid, V 4 at the same level as the anterior of acetabular plate (Fig. 6B). Palp five-segmented; P-2 ventral margin slightly convex; P-3 ventral margin nearly straight; P-4 with numerous dorsal hairs, two long hairs on the ventral surface of P-4 near the base, sword seta near the base (Fig. 6E). I-L-5 longish, S-1 close to S-2; I-L-6 curved (Fig. 8A). Female (n = 5) Similar to male (Figs 6F, 7). Idiosoma oval; ACG and PCG significantly smaller than the male; Ac in a weakly curved line (Fig. 7B). Measurements Male (n = 1) Idiosoma L 708, W 582; coxal field L 352, Cx-III W 415, ACG IL 232, mL 92, W 323; infracapitular bay L 146; genital field L 141, Ac1–3 L 35, 35, 38; chelicera L 223; infracapitulum L 210; palp dL: P-1 37, P-2 70, P-3 63, P-4 122, P-5 31; legs segments: I-L-1 dL 57, I-L-2 dL 106, I-L-3 dL 101, I-L-4 dL 139, I-L-5 dL 182, HB 50, I-L-6 dL 102, HB 32, S-1 L 58, S-2 L 58; dL: II-L-1 57, II-L-2 95, II-L-3 93, II-L-4 135, II-L-5 158, II-L-6 157; dL: III-L-1 55, III-L-2 102, III-L-3 114, III-L-4 165, III-L-5 191, III-L-6 180; dL: IV-L-1 118, IV-L-2 138, IV-L-3 181, IV-L-4 240, IV-L-5 272, IV-L-6 217. Female (n = 5) Idiosoma L 1074 (1050–1113), W 935 (868–935); coxal field L 385 (385–432), Cx-III W 575 (550– 585), ACG IL 248 (248–299), mL 111 (111–130), W 373 (373–417); infracapitular bay L 130 (105– 163); gonopore L 168 (161–190), Ap L 157 (145–171), Ac1–3 L 38 (34–48), 39 (39–49), 37 (32–48); chelicera L 264 (253–283); infracapitulum L 215 (214–244); palp dL: P-1 46 (40–46), P-2 75 (75–86), P-3 66 (66–80), P-4 126 (121–145), P-5 37 (36–37); legs segments: I-L-1 dL 62 (62–77), I-L-2 dL 106 (106–136), I-L-3 dL 107 (107–126), I-L-4 dL 153 (151–176), I-L-5 dL 200 (200–233), HB 53 (53–59), I-L-6 dL 120 (120–132), HB 31 (31–36), S-1 L 63 (62–68), S-2 L 63 (62–69); dL: II-L-1 61 (61–72), II-L-2 93 (93–109), II-L-3 109 (98–124), II-L-4 144 (142–163), II-L-5 168 (168–204), II-L-6 170 (170– 191); dL: III-L-1 67 (65–84), III-L-2 102 (102–116), III-L-3 119 (115–137), III-L-4 178 (178–203), III-L-5 208 (206–233), III-L-6 200 (190–212); dL: IV-L-1 149 (129–149), IV-L-2 159 (156–179), IV-L-3 202 (191–234), IV-L-4 261 (252–294), IV-L-5 286 (276–321), IV-L-6 232 (223–255). Remarks The new species Atractides (Atractides) menyuanensis sp. nov. is similar to Atractides algeriensis Lundblad, 1942 in the following points: (1) apodemes from ACG not reaching to Cx-IV; (2) P-2 ventral margin slightly convex, P-3 ventral margin nearly straight; (3) Ac in a weakly curved line in female. However, A. (A.) menyuanensis differs from A. algeriensis in following aspects: (1) two long hairs on the ventral surface of P-4 near the base, sword seta near the base in A. (A.) menyuanensis, but the ventral surface of P-4 divided by two long ventral hairs in 1:1:1, sword seta at the middle of P- 4 in A. algeriensis; (2) S-1 much more close to S- 2 in A. (A.) menyuanensis than in A. algeriensis; (3) I-L-6 of A. algeriensis much longer and more slender than that of A. (A.) menyuanensis (Gerecke 2003)., Published as part of Zhang, Yu-Hao, Li, Hai-Tao, Li, Cai-Yun & Guo, Jian-Jun, 2022, New species of genus Atractides Koch, 1837 (Acari: Hydrachnidiae, Hygrobatidae) from Qinghai, China, pp. 121-142 in European Journal of Taxonomy 833 (1) on pages 131-133, DOI: 10.5852/ejt.2022.833.1889, http://zenodo.org/record/6958174, {"references":["Gerecke R. 2003. Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision. Zoological Journal of the Linnean Society 138 (2 - 3): 141 - 378. https: // doi. org / 10.1046 / j. 1096 - 3642.06 - 0.00051. x"]}

Atractides (Atractides) biprojectus Zhang, Li & Guo sp. nov. urn:lsid:zoobank.org:act: 06CA408F-1FC6-4FD0-AA2A-E94B784621C0 Figs 1–3 Diagnosis Male Dorsal muscle attachment unsclerotized. I-L-5 longish, S-1 and S-2 with blunt tips and with a narrow setal interspace between them; I-L-6 curved. Ac in an obtuse triangle, V1 separated from V2. P-2 and P-3 with a ventral projection respectively; P-4 divided by two long ventral hairs in sectors 2:3:1, sword seta between two ventral hair insertions and near the terminal. Female Similar to male. Ventral projection of P-2 not obvious, and P-3 ventral margin nearly straight. Etymology The Latin prefix ‘ bi -’ means two, in the male of the new species P-2 and P-3 are with a ventral projection respectively. Type material Holotype CHINA • ♂; Qinghai Province, Huangnan Tibetan Autonomous Prefecture, Zeku County, Maixiu Town; 35°18′64′′ N, 101°52′32′′ E; 3201 m a.s.l.; 17 Jul. 2020; Hai-Tao Li leg.; running water; GUGC, Slide No. QH-HY-2020071701. Paratypes CHINA • 3 ♂♂; same collection data as for holotype; GUGC, Slides No. QH-HY-2020071702 to 2020071704 • 1 ♀; same collection data as for holotype; GUGC, Slide No. QH-HY-2020071705. Description Male (n = 4) Idiosoma oval; dorsal muscle attachment unsclerotized, O 2 and D 1 at the same level; setae of D 1 and D 2 longer than others, setae of D 2 reaching to D 3; all slit organs visible, So 1 near the eye capsule and at the level of O 1 , So 2 in front of L 2 , So 3 near D 2 , So 4 at the middle of D 3 and L 4 ; So 5 behind D 4 (Fig. 1A). ACG fused together and with a suture, PCG separated; apodemes from ACG not reaching to Cx-IV. Acetabula three pairs and in an obtuse triangle; V 1 separated from V 2 ; V 3 and V 4 forming a trapezoid, V 4 at the same level as the middle of Ap (Fig. 1B). Palp five-segmented; P-2 and P-3 with a ventral projection respectively; P-4 with numerous dorsal hairs, and divided by two long ventral hairs in sectors 2:3:1, sword seta between two ventral hair insertions and near the terminal (Fig. 1E). I-L-5 longish, S-1 and S-2 both with blunt tips and with a narrow setal interspace between them; I-L-6 curved (Fig. 3A). Female (n = 1) Similar to male (Fig. 2). Setae of D1 and D2 shorter than that in male (Fig. 2A); ventral projection of P-2 not obvious, and P-3 ventral margin nearly straight (Fig. 1F). Measurements Male (n = 4) Idiosoma L 641 (585–645), W 546 (443–546); coxal field L 316 (314–325), Cx-III W 333 (333–347), ACG IL 237 (234–239), mL 125 (107–125), W 268 (268–284); infracapitular bay L 123 (118–127); genital field L 120 (119–120), Ac1–3 L 34 (33–38), 34 (34–42), 37(37–40); chelicera L 205 (204–207); infracapitulum L 159 (140–177); palp dL: P-1 29 (29–32), P-2 74 (68–74), P-3 62(59–66), P-4 95(95– 99), P-5 27 (27–29); legs segments: I-L-1 dL 48 (46–52), I-L-2 dL 93 (89–93), I-L-3 dL 80 (78–80), I-L-4 dL 119 (119–125), I-L-5 dL 163 (163–176), HB 53 (53–60), I-L-6 dL 119 (119–122), HB 22 (21–22), S-1 L 90 (78–90), S-2 L 74 (74–75); dL: II-L-1 47 (47–50), II-L-2 82 (74–82), II-L-3 71 (70–74), II-L-4 92 (92–102), II-L-5 116 (116–120), II-L-6 124 (124–127); dL: III-L-1 56 (53–57), III-L-2 90 (81–90), III-L-3 75 (73–77), III-L-4 124 (124–125), III-L-5 146 (146–154), III-L-6 141 (133–147); dL: IV-L-1 117 (117–120), IV-L-2 105 (102–113), IV-L-3 138 (135–138), IV-L-4 174 (174–180), IV-L-5 199 (199–208), IV-L-6 163 (162–170). Female (n = 1) Idiosoma L 902, W 721; coxal field L 390, Cx-III W 477, ACG IL 272, mL 137, W 355; infracapitular bay L 165; gonopore L 146, Ap L 140, Ac1–3 L 43, 47, 47; chelicera L 267; infracapitulum L 222; palp dL: P-1 38, P-2 84, P-3 84, P-4 123, P-5 34; legs segments: I-L-1 dL 64, I-L-2 dL 113, I-L-3 dL 114, I-L-4 dL 176, I-L-5 dL 242, HB 77, I-L-6 dL171, HB 26, S-1 L 120, S-2 L 106; dL: II-L-1 72, II-L-2 98, II-L-3 96, II-L-4 135, II-L-5 153, II-L-6 162; dL: III-L-1 69, III-L-2 100, III-L-3 107, III-L-4 168, III-L-5 193, III-L-6 181; dL: IV-L-1 153, IV-L-2 141, IV-L-3 184, IV-L-4 231, IV-L-5 267, IV-L-6 211. Remarks The new species Atractides (Atractides) biprojectus sp. nov. is similar to Atractides yazdensis Pešić, Smit & Saboori, 2021 in the following points: (1) male P-2 and P-3 with ventral projections; (2) setae S-1 and S-2 separated, with a narrow setal interspace; (3) V 1 separated from V 2 . However, A. (A.) biprojectus differs from A. yazdensis in following aspects: (1) P-4 sword seta between two ventral hair insertions in A. (A.) biprojectus, but slightly proximal to posteroventral hair in A. yazdensis; (2) apodemes from ACG not reaching to Cx-IV in A. (A.) biprojectus, but reaching to Cx-IV in A. yazdensis; (3) genital field of A. (A.) biprojectus much rounder than that of in A. yazdensis (Pešić et al. 2021)., Published as part of Zhang, Yu-Hao, Li, Hai-Tao, Li, Cai-Yun & Guo, Jian-Jun, 2022, New species of genus Atractides Koch, 1837 (Acari: Hydrachnidiae, Hygrobatidae) from Qinghai, China, pp. 121-142 in European Journal of Taxonomy 833 (1) on pages 123-127, DOI: 10.5852/ejt.2022.833.1889, http://zenodo.org/record/6958174, {"references":["Pesic V., Smit H. & Saboori A. 2021. New records of the water mite genus Atractides Koch, 1837 from Iran (Acari: Hydrachnidia: Hygrobatidae). Ecologica Montenegrina 44: 1 - 10. https: // doi. org / 10.37828 / em. 2021.44.1","Pesic V. & Smit H. 2021 a. A new species of the genus Atractides Koch, 1837 from Turkey (Acari: Hydrachnidia: Hygrobatidae). Ecologica Montenegrina 43: 44 - 50. https: // doi. org / 10.37828 / em. 2021.43.6"]}

According to spray cooling characteristics for failure of the cooling system in the spent fuel pool, we establish a model for analyzing spray cooling of a single spent fuel rod and develop a code named SFSC which is used to calculate the thermal-hydraulic characteristics of film on the spent fuel rod under the condition of spray cooling. The results obtained from SFSC consist of film thickness, film temperature, film evaporation, fuel pellet temperature of spent fuel rod and cladding temperature of spent fuel rod at different height of spent fuel rod are shown in this paper. At the same time, we establish same model by RELAP and compare results calculated by RELAP with that calculated by SFSC. The good agreement of two results demonstrates that SFSC is effective. SFSC fills in the blanks of thermal-hydraulic calculation for the spent fuel rod under the condition of spray cooling.