Atractides baderi Schwoerbel & Sepasgozarian, 1976

Pesic, Vladimir, Saboori, Alireza, Asadi, Mahdieh & Vafaei, Reza, 2004, Studies on water mites of the family Hygrobatidae (Acari, Hydrachnidia) from Iran, I. The water mite genus Atractides Koch, with the description of five new species, Zootaxa 495, pp. 1-40 : 32-35

Atractides baderi Schwoerbel & Sepasgozarian, 1976

( Figs. 59–65 )

Type series: Holotype ɗ, Typ. P. J/25, Atractides (Iranomegapus) sepasi . ɗ. River near Delijan, 0 8.10.1974, coll. Schwoerbel. Paratype Ψ, P. J/26. Allotyp, label and state as holotype. Probably Schwoerbel planned to describe this species under the name of A. sepasi , but latter change in baderi before publication.

Diagnosis: dorsal integument: finely striated; muscle attachments: unsclerotized. I­L: I­L­5 with S­1and ­2 rather short, I­L­6 distally thickened, in the center narrowed. Genital field: Ac small and roundish, in a curved line. Excretory pore: smooth; Vgl­1: not fused with Vgl­2. Palp: P­2 and P­3 each with a ventral protrusion, P­4 sword seta inserted halfway between ventral hairs.

Description: Male (in parentheses data from Schwoerbel & Sepasgosarian 1976):Length of idiosoma (800), width (640). Dorsally the integument is finely striated; muscle attachments: unsclerotized. Coxal field ( Fig. 59 ); length between anterior end of first coxae and posterior end of fourth coxae 374; Cx­3 width 479, Cx­1+2 width 366; Cx­ 1+2 medial suture 83 in length. Measurements of mouthparts: chelicera 277 in length, claw 77 in length; palp total length 448, dorsal length and relative length (% total length, in parentheses) of single segments: P­1 40 (8.9), P­2 102 (22.8), P­3 123(27.5), P­4 140 (31.3), P­5 43 (9.6); length ratio P­2/P­4 is 0.73; palp ( Fig. 62 ): P­2 and P­3 each with a ventral protrusion more or less conus­shaped, P­4 sword seta inserted halfway between ventral hairs. Genital field ( Fig. 60 ): anterior margin straight, posterior margin convex; Ac small, in a curved line, approached to the distal edge of the genital field; 115 in length, 139 in width, Ac­1­3 length 14­12­13; excretory pore smooth; Vgl­1: separated from Vgl­2.

I­L ( Fig. 65 ): I­L­5 little modified, with S­1/2 rather short, I­L­6 distally thickened, in the center narrowed; I­L­5 dorsal length 205, I­L­5 central height 59 (40), ratio dorsal length I­L­5/central height 3.47 (5.1), S­1 length 80, ratio length S­1/width 12.0, S­2 length 66, ratio length S­2/width 10.7, distance between sword setae of I­L­5 14 (20); ratio length S­1/2 1.21; I­L­6 length 172, I­L­6 central height 39, ratio length I­L­6/central height 4.4; ratio length I­L­5/6 1.19.

Female (in parentheses data from Schwoerbel & Sepasgosarian 1976): Length of idiosoma (770), width (660). Dorsally the integument is finely striated; muscle attachments: unsclerotized. Coxal field: length between anterior end of first coxae and posterior end of fourth coxae 464; Cx­3 width 631; Cx­1+2 medial suture 86 in length; distance from lateralmost tips of Cx­2 to the medioposterior edge of Cx­1+2 300. Measurements of mouthparts: palp total length 562, dorsal length and relative length (% total length, in parentheses) of single segments: P­1 47 (8.4), P­2 130 (23.1), P­3 162 (28.8), P­4 175 (31.1), P­5 48 (8.5); length ratio P­2/P­4 is 0.74; palp ( Fig. 63 ): P­2 and P­3 each with a ventral protrusion more or less conus­shaped, P­4 sword seta inserted halfway between ventral hairs. Genital field ( Fig. 64 ): Ac small, in a curved line, approached to the distal edge of the plates; genital plates 119 in length, 32 in width, Ac­1­3 length 17­17­19; excretory pore smooth; Vgl­1: separated from Vgl­2.

I­L ( Fig. 61 ): I­L­5 dorsal length 269, I­L­5 central height 69 (32 [probably basal height]), ratio dorsal length I­L­5/central height 3.9, S­1 length 84, ratio length S­1/width 14.6, S­2 length 71, ratio length S­2/ width 8.7, distance between sword setae of I­L­5 15 (19); ratio length S­1/2 1.18; I­L­6 length 214, I­L­6 central height 47, ratio length I­L­6/ central height 4.6; ratio length I­L­5/6 1.26.

Remarks: Until now, this species has remained easily recogniceable on the base of the diagnostic features given here. It is the only species in Palaearctic with protruding ventral margin of P­ 3 in females. The differences between orginal description and our measurements are probably due to squeezing in the holotype preparation.

Distribution: Iran.

Figures

FIGURES 59 – 65. Atractides baderi Schwoerbel & Sepasgozarian, 1976, (59, 60, 62, 65 = male; 61, 63, 64 = female): 59 = coxal field; 60 = genital field; 61 = I­L­ 5 / 6; 62 = palp; 63 = palp; 64 = genital field; 65 = I­L­ 5 / 6. Scale bars = 0.1 mm.