Torrenticola dolichorrhyncha (Lundblad, 1952)

PešićK, Vladimir, K, Harry Smit & K, Mer Man Gurung, 2022, Torrenticolid water mites of Bhutan. Genera Torrenticola Piersig, 1896 and Neoatractides Lundblad, 1941 (Acari: Hydrachnidia: Torrenticolidae), Acarologia 1941 (3), pp. 821-860 : 824-828

Torrenticola dolichorrhyncha (Lundblad, 1952)

Figures 3, 4

Material examined — Bhutan: MG 8 Dangdung Chhu, 27.33461°N, 90.59562°E, 1039

m asl, 30.x.2021 1♂ (dissected and slide mounted); MG 9 Kartigang Chhu, 27.27896°N, 90.63088°E, 1456 m asl, 7.v.2021, 1♂, 1♀ (1♂ dissected and slide mounted); MG 12 Nika

Chhu, 27.526010°N, 90.29947°E, 2609 m asl., 4.xi.2021, 7♂, 6♀ (2♂ dissected and slide mounted); MG 12 Nika Chhu, 27.526010°N, 90.29947°E, 2609 m asl, 4.xi.2021, 4♀ ; MG 12

Nika Chhu, 27.526010°N, 90.29947°E, 2609 m asl, 10.v.2021 3♂, 3♀ ; MG 12 Nikka Chhu, 27.526010°N, 90.29947°E, 2609 m asl, 10.v.2021, 2♂, 4♀ ; MG 13 Rukhubji Chhu, 27.51174°N,

90.29711°E, 2587 m asl, 5.xi.2021, 1♂, 1♀ ; MG 13 Rukhubji Chhu, 27.51174°N, 90.29711°E,

2587 m asl, 12.v.2021 3♂, 5♀ ; MG 14 Chuserbu stream, 27.50246°N, 90.31782°E, 2666 m asl.,

6.xi.2021, 2♂, 9♀ ; MG 14 Chuserbu stream, 27.50246°N, 90.31782°E, 2666 m asl, 13.v.2021,

4♂, 4♀ (2♂ dissected and slide mounted); MG 15 Khabab Chhu, 27.48492°N, 90.33490°E, 2500 m asl, 7.xi.2021, 1♂ (damaged; palps lacking), 2♀ (1♀ dissected and slide mounted); MG 15 Khabab Chhu, 27.48492°N, 90.33490°E, 2500 m asl, 14.v.2021, 3♂, 4♀ ; MG 16 Chendebji Chhu, 27.47692°N, 90.35265°E, 2483 m asl, 8.xi.2021 6♂, 6♀ ; Royal Botanical

Park, Lampelri, 27.50750°N, 89.75269°E, 2667 m asl, 10.viii.2016 leg. W. Klein, 6♂ ; springs in meadow E of Takchu, 27.35820°N, 89.286310°E, 2907 m asl, 10.viii.2016 leg. W. Klein,

3♂ ; Pool 3, Haa Chhu River, Domcho, 27.36472°N, 89.29564°E, 2675 m asl, 10.viii.2016 leg. W. Klein, 7♂, 4♀ (1♂ dissected and slide mounted).

Diagnosis — General features – Idiosoma roundish; dorsal shield with a colour pattern as given in Figures 4A, B ; area of primary sclerotization of the dorsal plate with two dorsoglandularia; gnathosomal bay U-shaped, proximally rounded; Cxgl-4 subapical; medial suture line of Cx-II+III relatively short; excretory pore located away from the line of primary sclerotization; gnathosoma ventral margin strongly curved, rostrum strongly elongated (Figure

4E); P-2 longer than P-4; P-2 ventral margin straight, P-2 and P-3 ventrodistal protrusions blunt, laterally flattened, P-4 with a well-developed ventral tubercle bearing one longer and three shorter setae ( Figure 3C). Male (measurements of one specimen from Chuserbu stream; in parentheses measurements from Lundblad 1969) – Idiosoma L 788 (759), W 581; dorsal shield

L/W 647 (612)/525; medial suture Cx-II+III L 100 (107); genital field subrectangular, L/W

172(175)/128(122); suture line of Cx-IV evident, medially starting from posterior margin of genital field in a right angle to the main idiosoma axis; genital field subrectangular; ejaculatory complex conventional in shape, anterior keel, proximal and distal arms well developed (Figure

4C); L P-2 106 (103), P-4 91 (93). Female (measurements of one specimen from Khabab Chhu)

– Idiosoma L 872 (758), W 675; dorsal shield L/W 700(620)/600; medial suture Cx-II+III L

63; genital field L/W 197 (168)/161 (121); suture lines of Cx-IV extending posteriorly beyond posterior margin of genital field, laterally curved; excretory pore and Vgl-2 away from the line of primary sclerotization; L P-2 106 (99), P-4 89 (94).

Remarks — The specimen from Bhutan matches the description of T. dolichorrhyncha ,

a species originally described on basis of specimens collected from a stream at the Kambaiti mountain pass in Myanmar ( Lundblad 1941, 1969).

Distribution — Myanmar, Bhutan (this study).