Torrenticolid water mites of Bhutan. Genera Torrenticola Piersig, 1896 and Neoatractides Lundblad, 1941 (Acari: Hydrachnidia: Torrenticolidae) Author PešićK, Vladimir University of Montenegro, Cetinjski put bb, 81000 Podgorica, Montenegro. Author K, Harry Smit Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, the Netherlands. Author K, Mer Man Gurung text Acarologia 2022 2022-09-01 1941 3 821 860 journal article 2107-7207 Torrenticola longiseta sp. nov. Zoobank: 28E8E90D-E1EC-4473-9A2B-188D5C93BE21 Figures 10 , 11 , 14A–C Material examined — Holotype ♂ , dissected and slide mounted, Bhutan , MG5 Dakpay Chhu , 27.14621°N , 90.69220°E , 539 m asl , 27.x.2021 . Paratypes : 4♂ , 4♀ , same data as holotype , 1♀ dissected and slide mounted; 2♀ , same data as holotype , 1.v.2021 , 1♀ dissected and slide mounted; 1♂ (juvenile), 1♀ (juvenile), MG 1 Maidagang Chhu, 27.12761°N , 90.71560°E , 554 m asl, 20.x.2021 ; 1♂ , MG 4 Takabi Chhu, 27.14782°N , 90.68833°E , 543 m asl, 26.x.2021 . Diagnosis — Shoulder platelets fused with dorsal plate; dorsal shield with colour pattern as illustrated in Figures 14A, B ; Cxgl–4 subapical; medial suture line of Cx-II+III relatively short; P-2 ventrodistal extension relatively short, on a large base, triangular, P-2 ventral seta long, clearly exceeding width of segment. Description — General features – Idiosoma oval; shoulder platelets fused to dorsal plate, but suture line visible; dorsal shield with a colour pattern as illustrated in Figures 14A, B ; area of primary sclerotization of the dorsal plate with two dorsoglandularia; gnathosomal bay U-shaped, proximally rounded; Cxgl-4 subapical; suture lines of Cx-IV distinctly extending posteriorly beyond posterior margin of genital field; excretory pore and Vgl-2 away from the line of primary sclerotization; gnathosoma with a strongly curved ventral margin, rostrum elongated ( Figure 10E ); P-2 ventral margin straight or slightly concave, ventral seta long, exceeding the segment width, P-2 and P-3 ventrodistal protrusions relatively short, P-2 ventrodistal extension slightly curved distally, P-3 ventral seta long, P-4 distally tapering, with a ventral tubercle bearing one long and three shorter setae ( Figures 10D , 11B ). Male – Medial suture line of Cx-II+III relatively short; genital field subrectangular; ejaculatory complex conventional in shape (with well-developed anterior keel and proximal arms; Figure 14C ). Measurements . Male ( holotype ) – Idiosoma (ventral view: Figure 10C ) L 734, W 606; dorsal shield ( Figures 10B , 14A ) L 638, W 516, L/W ratio 1.24; dorsal plate L 603; frontal plate L 145–147, W 53–55, L/W ratio 2.7–2.8. Gnathosomal bay L 167, Cx-I total L 297, Cx-I mL 128, Cx-II+III mL 94; ratio Cx-I L/Cx-II+III mL 3.16; Cx-I mL/Cx-II+III mL 1.36. Genital field L/W 142/114, ratio 1.24; distance genital field-excretory pore 134, genital field-caudal idiosoma margin 184. Ejaculatory complex L 178. Gnathosoma vL 294, chelicera L 368; palp total L 356, dL/H, dL/H ratio: P-1, 36/36, 0.99; P-2, 119/64, 1.88; P-3, 61/59, 1.04; P-4, 123/34, 3.6; P-5, 17/11, 1.6; L ratio P-2/P-4 0.93. dL of I-L-2–6: 66, 81, 98, 103, 103; I-L-6 H 30; dL/H I-L-6 ratio 3.4. Female ( paratype from Dakpay Chhu, n = 1) – Idiosoma (ventral view: Figure 11A ) L 887, W 700; dorsal shield ( Figure 14B ) L 731, W 613, L/W ratio 1.19; dorsal plate L 688; frontal plate L 167–170, W 59, L/W ratio 2.8–2.9. Gnathosomal bay L 194, Cx-I total L 334, Cx-I mL 138, Cx-II+III mL 44; ratio Cx-I L/Cx-II+III mL 7.6; Cx-I mL/Cx-II+III mL 3.15. Genital field L/W 169/150, ratio 1.13; distance genital field-excretory pore 222, genital field-caudal idiosoma margin 322. Gnathosoma vL 338, chelicera L 438; palp total L 421, dL/H, dL/H ratio: P-1, 41/44, 0.95; P-2, 147/79, 1.87; P-3, 70/69, 1.02; P-4, 141/39, 3.6; P-5, 22/13, 1.75; L ratio P-2/P-4 1.05. dL of I-L-4–6: 106, 111, 102; I-L-6 H 30; dL/H I-L-6 ratio 3.4. Etymology — The species is named for its long setae of the palp. Discussion — The new species is most similar to Torrenticola minuta ( Lundblad, 1941 ) , a species originally described from Java ( Lundblad 1941 ), and later on reported from the Malay Peninsula ( Wiles 1997 ). Both species have the dorsal shield with the shoulder platelets partially fused with the dorsal plate, a Cxgl-4 situated subapically and a relatively short median suture line of Cx-II–III in the male. The new species from Bhutan can be separated from T. minuta by P-2 with a shorter ventral projection and a longer ventral seta T (. minuta has a shorter ventral seta, not exceeding width of the segment, see Lundblad 1956 , Figure 4F , and Wiles 1997 , Figure 13C ) and by a different colour pattern of the dorsal shield (in T. minuta typically with a broad posterior band of blue/violet pigment, Wiles 1997 ). Figure 10 Torrenticola longiseta sp. nov . , ♂ holotype, MG5 Dakpay Chhu: A – frontal margin of idiosoma, dorsal view; B – dorsal shield; C – ventral shield; D – palp, medial view; E – gnathosoma and chelicera. Scale bars = 100 μm. Figure 11 Torrenticola longiseta sp. nov . , ♀ paratype, MG5 Dakpay Chhu: A – ventral shield; B – palp, medial view. Scale bars = 100 μm. Distribution — Bhutan .