Atractides (Atractides) sonkulensis, Pešić & Smit, 2018

Pešić, Vladimir & Smit, Harry, 2018, A checklist of the water mites of Central Asia with description of six new species (Acari, Hydrachnidia) from Kyrgyzstan, Acarologia 58 (1), pp. 165-185 : 181

Atractides (Atractides) sonkulensis n. sp. ( Figures 8-9 )

Zoobank: CC68E207-1755-4B42-BF73-6E2F3F99C84F

Type material — Holotype male ( RMNH), Kyrgyzstan, KR32 stream near Son Kul Lake , 41°55.480’N, 75°11.865’E, 3066 m asl., 16.vii.2013, leg. Pešić & Smit, dissected and slide mounted . Paratypes: 10/27/0, same data as holotype, 2/1/0, dissected and slide mounted.

Further records — Kyrgyzstan, KR31 River near Son Kul Lake, 41°51.549’N, 75°20.133’E, 3049 m asl., 16.vii.2013, leg. Pešić & Smit 0/3/0; KR34 Son Kul Lake area, rheohelocrenic spring 1, 41°56.236’N, 75°12.686’E, 3093 m asl., 16.vii.2013, Pešić & Smit 0/2/0.

Diagnosis — Coxae with sexual dimorphism (in male coxal field merged to an unique plate, including Vgl-3; in female coxal plates separate); ventral margin of P-2 nearly straight, P-3 with one seta each on medial and lateral surface extending beyond ventral margin of segment; in male S-1/-2 close to each other (separation 9-10 μm).

Description — General features — Integument dorsally striated, muscle insertions unsclerotized. Coxae with sexual dimorphism. Excretory pore smooth; Vgl-1 separate from Vgl-2. Palp with weak sexual dimorphism, ventral margin of P-2 nearly straight, forming a right distal angle, not protruding, P-3 with one seta each on medial and lateral surface, P-4 sword seta between ventral setae. I-L-5: S-1 longish and blunt, S-2 pointed and thicker than S-1, I-L-6 curved, basally thickened. Male: Coxae with extended secondary sclerotization, forming a coxal shield, including Vgl-3 ( Figure 8A ); genital plate with extended convex margin of secondary sclerotization, posterior margin indented, acetabula in an obtuse triangle ( Figure 8E ); P-4 thickened, slightly elevated near insertion of proximoventral seta ( Figures 8 C-D). Female. Coxal plates separate ( Figure 9A ); acetabula in a weakly curved line ( Figure 9B ); P-4 more slender ( Figures 9 C-D).

Measurements — Male (holotype; in parentheses paratypes, n = 2) — Idiosoma L (478- 491), W (350-353); maximum diameter Dgl 21 (22-23); coxal field: L 298 (302-322); Cx-III W 291 (288-311); genital field L/W 94/100 (86-88/92-95), maximum diameter Ac 1-3: 31 (24-27), 28 (22-23), 26 (24-23); ejaculatory complex L (105).

Gnathosoma — palp total L 276 (286); dL/H, dL/H ratio: P-1, 27/25, 1.06 (27/27, 1.0); P-2, 58/42, 1.38 (63/42, 1.48); P-3, 67/34, 1.95 (69/36, 1.92); P-4, 94/22, 4.28 (97/23, 4.2); P-5, 30/12, 2.6 (30/12, 2.5); L ratio P-2/P-4 0.62 (0.65). Gnathosomal base vL 89 (102); chelicera total L 161 (170).

Legs — I-L-5 dL 145 (145), vL 98 (101-103), dL/vL ratio 1.48 (1.4-1.43), maximum H 39 (38-40), dL/maximum H 3.7 (3.7-3.9), S-1 L 70 (70), L/W ratio 9.0 (8.1), S-2 L 63 (63-64), L/W ratio 6.7 (6.2-6.3), distance S-1-2 10 (9-10), L ratio S-1/2 1.1 (1.1); I-L-6 L 105 (106-108), central H 19 (20), L/central H ratio 5.4 (5.2-5.4); L ratio I-L-5/6, 1.38 (1.35-1.37).

Female (paratype, n = 1) — Idiosoma L 750, W 570; maximum diameter Dgl 22; coxal field: L 369; Cx-III W 441; Cx-I+II mL 125, lL 242; genital field L/W 159/175, genital plates L 109-114, pregenital sclerite W 79, maximum diameter Ac 1-3: 39, 34, 35.

Gnathosoma — palp total L 359; dL/H, dL/H ratio: P-1, 34/33, 1.04; P-2, 73/50, 1.47; P-3, 98/41, 2.4; P-4, 116/27, 4.35; P-5, 38/14, 2.66; L ratio P-2/P-4 0.63. Gnathosomal base vL

131; chelicera total L 248.

Legs — I-L-5 dL 213, vL 141, dL/vL ratio 1.52, maximum H 50, dL/maximum H 4.3, S-1 L 105, L/W ratio 11.1, S-2 L 75, L/W ratio 6.4, distance S-1-2 27, L ratio S-1/2 1.4; I-L-6 L 150, central H 22, L/central H ratio 6.7; L ratio I-L-5/6, 1.42.

Figures

Figure 8 Atractides sonkulensisn. sp., male (A, C-F holotype, B paratype): A – idiosoma, ventral view; B – posterior margin of coxal shield; C – palp, lateral view; D – palp, medial view; E – genital field; F – I-L-5 and -6. Scale bars = 100 μm.

Figure 9 Atractides sonkulensisn. sp., female paratype: A – coxal field; B – genital field; C – palp, lateral view; D – palp, lateral view; E – I-L-5 and -6. Scale bars = 100 μm.