Atractides (Atractides) lunipes Lundblad, 1956

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 : 24-27

Atractides (Atractides) lunipes Lundblad, 1956

Records from Turkey: Malatya Province (Pesic & Erman 2006). Habitat: Rhithrobiont.

Distribution: Mediterranean, Asia Minor , Iran.

Atractides (Atractides) martini Peši ć, Erman & Esen sp. nov. ( Figs. 3 – 4 )

Material examined: Holotype: male, conserved in Koenike’s fluid, Turkey: Erzurum Province, Ilıca, Sırlı stream, 24.ix.2006, 40˚14ˏ39˝N 41˚07ˏ00˝E, 2200 m asl., leg. Erman. Paratype: one male, same data as holotype, 14.ix.2006, dissected (coxal field and one palp partly damaged during dissection) and slide mounted in Hoyer’s fluid.

Diagnosis (female unknown). Dorsal integument striated; dorsum without shield and muscle attachment plates, but glandularia platelets rather large ( Fig. 3B ); Coxal field ( Fig. 3A ): Cx-IV with extended caudal and lateral border of secondary sclerotization including the anterior half of Vgl-3; palp ( Fig. 4A ): P-2 with noseshaped ventrodistal protrusion, P-3 ventral margin straight; P-4 ventral margin 2: 2: 1, sword seta between ventral hairs; gnathosoma with pointed, protruding rostrum ( Fig. 4B ); chelicera with long, needle-like claw ( Fig. 4C ); excretory pore unsclerotized; Vgl-1 not fused to Vgl-2; genital field: Ac relatively large, in triangular position; anterior margin with secondary sclerotization, posterior margin medially indented. I-L ( Fig. 4E ): I-L-5 S-1 and -2 close together, both blunt; S-1 thickened basally, curved, S-2 shorter and thicker; I- L-6 weakly curved, slightly narrowed in the centre.

Description. Male (paratype, in parentheses some measurements of holotype): Idiosoma L/W 650 (634)/ 514 (507); glandularia maximum diameter 43 (44); coxal field L 334 (303); Cx-III W 341 (336); Cx-I+II mL 122 (121); lL Cx-I+II 218 (203). Genital field ( Fig. 4D ): L/W 105 (117)/ 130 (138); L Ac- 1–3 32 (40), 46 (44), 45 (47), genital setae: 40.

Palp ( Fig. 4A ): total L 281, dL and %L (in parentheses): P-1, 28 (10.0); P-2, 63 (22.4); P-3, 69 (24.6); P- 4, 91 (32.4); P-5, 30 (10.7); L ratio P-2/P-4, 0.69. Gnathosoma ventral L 131; chelicera total L 239, ratio L basal segment/claw 1.89.

I-L ( Fig. 4E ): I-L-5 dL 165, vL 108, dL/vL ratio 1.53, HB 54, dL/HB 3.06, S-1 L 78, L/ W 7.8, S-2 L 60, L/ W 5.4, distance S- 1-2 18, L ratio S-1/2 1.3; I-L-6 L 107, HB 23, L/HB ratio 4.65; L ratio I-L-5/6 1.54. Female: unknown.

Discussion. The new species belongs to the ‘ subasper species group’ which includes Atractides subasper, A. octoporus , A. digitatus and A. heversi, characterized by a pointed, protruding gnathosomal rostrum and chelicerae with a long, needle-like claw ( Gerecke 2003). Due to the presence of three pairs of acetabula (four pairs of Ac in A. octoporus , more than 4 pairs of Ac in A. heversi) the new species is similar to A. subasper and A. digitatus, from which it can be easily distinguished in the absence of unsclerotized muscle attachment plates and thus no dorsal shield in males (dorsal muscle attachments plates sclerotized, fused forming an anterior and a posterior dorsal shield in A. digitatus, an extended dorsal shield or two shields separated by a transverse suture in the centre of the idiosoma in A. subasper). Additional differences are found in more strongly expressed heteromorphy of S-1 and -2, more thicker I-L-6 and the strong and narrow, finger-like distoventral protrusion of P- 2 in A. digitatus; in setae S-1 and - 2 rather homoimorphic and Ac arranged in a weakly curved line in A. subasper.

Etymology: Named after Dr Peter Martin (Kiel) in appreciation of his studies of water mites.

Habitat: Rhithrobiont.

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

Figures

FIGURE 3 A – B. Atractides martini sp. nov., male (A = holotype, B = paratype): A = idiosoma, ventral view; B = idiosoma, dorsal view. Scale bar = 100 μm.

FIGURE 4 A – E. Atractides martini sp. nov., male paratype: A = palp, medial view; B = gnathosoma; C = chelicera; D = genital field; E = I – L- 5 - and- 6. Scale bars = 100 μm.