Atractides (s. str.) nikooae Pesic , 2004

Esen, Yunus, Pesic, Vladimir, Erman, Orhan & Kaya, Yuecel, 2013, New water mites of the family Hygrobatidae (Acari, Hydrachnidia) from Turkey, ZooKeys 361, pp. 15-25 : 22-24

Atractides (s. str.) nikooae Pesic, 2004 Figs 5, 6

Material examined.

Siirt Province, Kezer stream, 37°57'42"N, 41°51'25"E, 545 m asl., 16.09.2012, (4/8/0); Başur stream, 37°57'42"N, 41°47'19"E, 525 m asl., 15.09.2012, (0/2/0).

Morphology.

General features. Integument dorsally finely striated; muscle attachment plates unsclerotized. Coxal field: mediocaudal margin of Cx-I+II with a slightly concave or convex area between the laterally directed apodemes of Cx-II. Palp: weak sexual dimorphism, P-2 and P-3 ventral margin straight; P-4 with maximum height near proximoventral hair, sword seta near distoventral hair, ventral margin divided by hair insertions 1:1:1. Genital field with Ac in a weakly curved line; excretory pore smooth; Vgl- 1 separate from Vgl-2. I-L-5: S-1 and -2 strongly heteromorphic and widely distanced, S-2 strongly thickened in the basal third; I-L-6 strongly curved, basally thickened.

Male (n = 2). Idiosoma L 470-527 W 420-432. Coxal field (Fig. 5A) L 320-311, Cx-III W 340-360, Cx-I+II medial suture line L 105-108. Palp (Fig. 5B) total L 285-296, dL and %L (in parentheses): P-1, 26-28 (9.0-9.5); P-2, 64-67 (22.2-22.6); P-3, 68-70 (23.6-23.7); P-4, 97-100 (33.8); P-5, 30-31 (10.5); chelicera L 170-187. Genital field apple shaped, L 90-92, W 100, anterior and posterior margin with shallow indentations (Fig. 5A). Legs: I-L-5 dL 192-193, vL 110-113, H 45-47; S-1 L 95, S-2 L 66-68; S-1-2 interspace 40-42; I-L-6 L 160-165, H 22-23; dL ratio I-L-5/6 1.2.

Female (n = 5). Idiosoma L 745-760 W 640-652. Coxal field (Fig. 6A) L 382-421, Cx-III W 465-480, Cx-I+II mL 135-142. Palp (Fig. 6B) total 417-445, dL and % L (in parentheses): P-1, 38-40 (9.0); P-2, 90-100 (22.1); P-3, 107-116 (30.0); P-4, 142-148 (33.4); P-5, 40-41 (9.5); P-4 more slender than in male; chelicera L 208. Genital field W 180-204, genital plate L 110-121. Legs: I-L-5 dL 263-280, vL 140-148, H 70-76; S-1 L 128-138, S-2 L 72-88, W 20-21 (ratio 3.6-4.2), ratio L S-1/2 1.78-1.57, S-1-2 interspace 70-72; I-L-6 L 217-230, H 28-30; dL ratio I-L-5/6 1.2.

Remarks.

Due to the similar morphology of the genital field (relatively small Ac arranged in a weakly curved line, male genital field apple-shaped with anterior an posterior margin slightly indented), I-L-5 and -6 (S-1 and S-2 with relatively wide setal interspace, I-L-6 strongly curved and slender) and palp (without sexual dimorphism, P-2 ventral margin straight in the both sexes), the specimens from Turkey shows conformity with Atractides nikooae Pešić, 2004, a species known from both sexes from the Markazi Province (western Iran, Pešić et al. 2004).

Atractides (s. str.) diastema (Szalay, 1935), a weakly defined species from Hungary and Poland, known only from a female sex, differs from Atractides nikooae (in parentheses data taken from Gerecke 2003) in a weakly S-shaped ventral margin of P-2, ventral margin P-4 divided by hair insertions in sections 2:2:1, more stouter palp segments (L/H P-3 2.77, P-4 4.2), and a less heteromorphic setae S-1/2 (L S-1/2 1.3).

Habitat.

Rhithrobiont.

Distribution.

Iran ( Pešić et al. 2004). New for Turkey.