Atractides (Atractides) yunusi, Pešić & Smit, 2021

Pešić, Vladimir & Smit, Harry, 2021, Water mites of the genus Atractides Koch, 1837 from Kyrgyzstan (Acari: Hydrachnidia: Hygrobatidae) with the description of six new species, Acarologia 61 (2), pp. 332-355 : 350-353

Atractides (Atractides) yunusi n. sp.

Zoobank: 62C22A6D-6393-4471-9EB3-A048DF6D9D39

Figures 13-14

Type material — Kyrgyzstan: Holotype ♂, dissected and slide mounted ( RMNH), KR15 Karakal region , road to May Saz pass, fast flowing river, 42°25.004 ′ N, 78°58.100 ′ E, 2981 m

a.s.l., 12 Aug. 2013, leg. Pešić & Smit. Paratypes: 1♂, same data as the holotype, leg. Pešić & Smit. KR14 Karakal region, road to May Saz pass, stream, 42°25.033 ′ N, 79°02.657 ′ E, 3348

m a.s.l., 12 Aug. 2013, leg. Pešić & Smit, 2♀ (1♀ dissected and slide mounted, RMNH); 1♂, small stream along the road to Son Kol Lake, 41°57.259 ′ N, 75°25.889 ′ E, 2789 m a.s.l., 15

Aug. 2013, leg. Pešić & Smit.

Other material — Kyrgyzstan: 1♂, 4♀, KR37 upper part of stream KR32 on the road to

Son Kol Lake, 41°54.819 ′ N, 75°25.697 ′ E, 3412 m a.s.l., 17. Aug. 2013, leg. Pešić & Smit.

Diagnosis — Integument striated; genital field with acetabula in a weakly curved line, Ac subtriangular in shape; excretory pore smooth; Vgl-1 not fused to Vgl-2; seta S-1 not pointed,

apically truncated, I-L-6 slender (L/H> 6.0 in ♂,> 7.0 in ♀) and relatively long, L I-L-5/6

ratio 1.3-1.5. Males: P-2 and P-3 ventrally each with a distinct protrusion; P-4 ventral setae short, not exceeding length of segment; genital plate anterior margin slightly convex or straight, not indented, Ac-3 subtriangular, not elongated. Female: P-3 without central thickening of its ventral margin.

Description — General features — Integument striated, muscle insertions unsclerotized; mediocaudal margin Cx-I convex, apodemes of Cx-II in an acute angle with the median line. Ac in a weakly cuved line, subtriangular in shape. Excretory pore smooth; Vgl-1 not fused to Vgl-2. Palp with strong sexual dimorphism, P-4 sword seta nearer to distoventral seta. I-L-5 setae S-1 and S-2 separated, S-1 longish with truncate tip, S-2 proximally enlarged; I-L-6 long and slender, curved, proximally slightly thickened, with parallel dorsal and ventral margins from the centre to the claw pit ( Figure 13D ). Male — Genital plate anterior margin slightly convex, posterior margin indented ( Figure 13B ); P-2 and P-3 each with a distinct ventral extension, P-4 slightly protruding near proximoventral seta, length of ventral setae not exceeding the length of the segment ( Figure 13E ). Female — genital plates medial margin with concavity on the level of Ac-2; ventral margin of P-2 stright, slightly convex at distal edge; P-2 and P-3 without projections, ventral margins of P-3 and P-4 straight ( Figure 14B ).

Measurements. Male (holotype) — Idiosoma L 681, W 488; maximum diameter Dgl-4, 23. Coxal shield L 369; Cx-III W 394; Cx-I+II mL 122, Cx-I+II lL 245. Genital field L/W 136/158, ratio 0.86, L Ac-1-3: 47, 53, 39-41. Ejaculatory complex ( Figure 13C ) L 117.

Gnathosoma — Palp total L 344; dL/H, dL/H ratio: P-1, 36/34; 1.04; P-2, 75/61, 1.23; P-3, 78/50, 1.56; P-4, 117/39, 3.0; P-5, 38/14, 2.7; length ratio P-2/P-4 0.64. Chelicera total L 197.

Legs — I-L-5 dL 208, vL 144, dL/vL ratio 1.45, maximum H 66, dL/maximum H 3.14, S-1 L 107, L/W ratio 8.6, S-2 L 92, L/W ratio 6.5, distance S-1-2, 17, dL ratio S-1/2 1.1; I-L-6 dL 156, central H 25, dL/central H ratio 6.3; L I-L-5/6 ratio 1.33.

Female (specimen from KR14, n = 1) — Idiosoma L 678, W 418; maximum diameter Dgl-4, 29. Coxal shield L 406; Cx-III W 463; Cx-I+II mL 127, Cx-I+II lL 272. Genital field

L/W 225/222, genital plates L 153-156, pregenital sclerite W 113, gonopore L 178, L Ac-1-3:

53-59, 56-63, 44-47. Egg maximum diameter (n =2) 181-184.

Gnathosoma — Palp total L 423; dL/H, dL/H ratio: P-1, 40/39, 1.02; P-2, 93/62, 1.51; P-3, 111/46, 2.42; P-4, 134/32, 4.25; P-5, 45/16, 2.7; length ratio P-2/P-4 0.69. Gnathosoma vL 163.

Legs — I-L-5 dL 272, vL 186, dL/vL ratio 1.46, maximum H 72, dL/maximum H 3.8, S-1

L 129, L/W ratio 9.2, S-2 L 102, L/W ratio 5.9, distance S-1-2, 31, dL ratio S-1/2 1.27; I-L-6

dL 184, central H 23, dL/central H ratio 7.9; L I-L-5/6 ratio 1.48.

Etymology — The new species is named after Yunus Esen (Bingöl, Turkey) in appreciation of his scientific work on water mites.

Discussion — Due to a similar shape of the palp and genital field, the new species most closely resembles A. ivanae n. sp. (see above). From the latter species, Atractides yunusi n. sp. differs in both sexes in the more slender I-L-6 (dL/H> 6.0), S-1 apically truncated, and in males ventral setae of P-4 is shorter, not exceeding the length of the segment as in A. ivanae n. sp.

Distribution — Kyrgyzstan ; known from high-order streams in Tien Shan mountains at an elevation from 2,700 to 3,400 meters.

Figures

Figure 13 A-E Atractides yunusin. sp., ♂ holotype, KR15 river on road to May Saz, Kyrgyzstan. A – coxal field, partial view; B – genital field; C – photograph of ejaculatory complex; D – I-L-5 and -6; E – palp, medial view. FAtractides gibberipalpis, ♂, Mrtvica river, Montenegro: genital field. Scale bars = 100 µm.

Figure 14 Atractides yunusin. sp., ♀, KR14 stream on road to May Saz, Kyrgyzstan. A – genital field: B – palp, medial view; C – I-L-5 and -6. Scale bar = 100 µm.