Atractides (Atractides) allgaier Gerecke, 2003

Erman, Orhan, Pešić, Vladimir, Esen, Yunus & Özkan, Muhlis, 2010, A checklist of the water mites of Turkey (Acari: Hydrachnidia) with description of two new species, Zootaxa 2624, pp. 1-48 : 20-21

Atractides (Atractides) allgaier Gerecke, 2003

New records: Antalya Province, Boġa stream, 14.viii.2007, 36˚52ˏ06˝N 30˚38ˏ52˝E, 5 m asl., Erman 1/1/0; Rize Province, small stream (tributary of Iyidere stream) near Iyidere town, 22.vii.2005, Pešić, Turan & Vukašinović-Pešić 1/0/0 (mounted).

Records from Turkey: Rize Province ( Turan & Pešić 2005a; Pešić et al. 2007). Habitat: Rhithrobiont.

Distribution: Central and SE Europe, Balkan, Asia Minor .

Atractides (Atractides) anatolicus Peši ć, Erman & Esen sp. nov. ( Figs. 1 – 2 )

Material examined: Holotype: male, dissected and slide mounted in Hoyer’s fluid, Turkey: Bingöl Province, stream in Kuruca village, 38°57'24"N 40°14'47"E, 1550 m asl. 18.v.2009 leg. Esen. Paratypes: 10/51/0, same data as holotype, one male and one female of them dissected and slide mounted in Hoyer’s fluid.

Diagnosis. Dorsal integument striated; muscle attachment plates unsclerotized; Coxal field: enlarged Cx- I with median suture very short ( Fig. 1A – B ); palp: weak sexual dimorphism, P-2 with nose-shaped ventrodistal protrusion, with rugose surface, separated by a small sulcus from a convexly rounded lateral area, P-3 ventral margin straight and with a rough surface distally; P-4 ventral margin with denticles near hair insertion, sword seta between ventral hairs; excretory pore unsclerotized; Vgl-1 not fused to Vgl-2; genital field: Ac relatively large. I-L: I-L-5 basally slender, slightly thickened near insertion of S-1 and -2; S-1 and -2 homoiomorphic, slender and short, blunt, close to each other; I-L-6 weakly curved, stout, only slightly narrowed in the centre.

Description. Male (holotype, in parentheses measurements of one paratype specimen): Idiosoma L/W 594 – 610/512 – 519; coxal field L 303 (305); Cx-III W 409 (422); Cx-I+II mL 64 (60); lL Cx-I+II 213 (208). Genital field ( Fig. 1A ): anterior margin straight, L/W 123 (118)/150 (132), L Ac- 1–3 41 (37), 46 (42), 43 (42), genital setae: 67.

Palp ( Fig. 2A – B ): total L 320 (317), dL: P-1, 31 (31); P-2, 77 (76); P-3, 73 (75); P-4, 103 (100); P-5, 36 (35); %L: P-1, 9.7 (9.8); P-2, 24.1 (24.0); P-3, 22.8 (23.7); P-4, 32.2 (31.6); P-5, 11.3 (11.0); L ratio P-2/P-4, 0.75 (0.76).

I-L ( Fig. 2C ): I-L-5 dL 162 (162), vL 101 (103), dL/vL ratio 1.61 (1.57), HB 51 (48), dL/HB 3.18 (3.4), S- 1 L 86 (83), L/ W 11.3 (10.8), S-2 L 59 – 62 (59), L/ W 9.4 – 9.9 (9.4), distance S- 1-2 15 – 16 (14), L ratio S-1/2, 1.39 – 1.46 (1.42); I-L-6 L 138 (140), HB 29 (26), L/HB ratio 4.8 (5.4); L ratio I-L-5/6 1.17 (1.15).

Female: Idiosoma L/W 775 – 869/631 – 700 (n=3); coxal field L 352; Cx-III W 492; Cx-I+II mL 73; lL Cx- I+II 218. Genital field ( Fig. 1C ): pregenital sclerite curved, W 92, gonopore extending far over the anterior margins of the genital plates, L/W, 218/229; individual genital plate L 143; L Ac- 1–3 42 -45, 45 – 52, 44 – 46.

Palp ( Fig. 2D ): total L 393, dL and %L (in parentheses): P-1, 36 (9.2); P-2, 94 (23.9); P-3, 95 (24.2); P-4, 126 (32.1); P-5, 42 (10.7); L ratio P-2/P-4, 0.75.

I-L ( Fig. 2E ): I-L-5 dL 205, vL 145, dL/vL ratio 1.42, HB 52, dL/HB 3.93, S-1 L 92, L/ W 10.8, S-2 L 77, L/ W 10.0, distance S- 1-2 13, L ratio S-1/2 1.2; I-L-6 L 168, HB 26, L/HB ratio 6.4; L ratio I-L-5/6 1.22.

Discussion. Due to the striated integument, Ac not very enlarged, unfused Vgl-1/2, homoimorphic S-1 and -2, with small interspace, strongly curved but stocky I-L-6, and a palp with weak sexual dimorphism, the new species is similar to Atractides samsoni (Sokolow, 1936) (known from Northern Russia, Sweden and Poland, Gerecke 2003) and to A. samsonellus Tuzovskij 2006 (known from Northern Caucassus, Tuzovskij 2006). From both species, Atractides anatolicus sp. nov. can be distinguished by a very short medial suture of Cx-1 and -2. Furthermore, both sexes of A. anatolicus differ from A. samsonellus in a distinct extending ventrodistal projection of P-2 (rounded ventrodistal protrusion in A. samsonellus) and a smooth excretory pore (surrounded by narrow slightly sclerotized ring in A. samsonellus). It’s worth to note that a very short median suture of Cx-I and -II characterize some hyporheobiontic species, members of the cisternarum species group (e.g., Atractides cisternarum, A. denticulatus , A. similis , see Gerecke 2003).

Etymology: Named after the country of the type locality.

Habitat: Rhithrobiont.

Distribution: Known only from the type locality in Bingöl Province, Turkey.

Figures

FIGURE 1 A – C. Atractides anatolicus sp. nov. (A = male, B – C = female): A = coxal and genital field; B = coxal field; C = genital field. Scale bar = 100 μm.

FIGURE 2 A – E. Atractides anatolicus sp. nov. (A – C = male, D – E = female): A = palp, medial view; B, D = palp, lateral view; C, E = I – L- 5 and - 6. Scale bar = 100 μm.