New records of water mites of the genus Atractides Koch, 1837 (Acari: Hydrachnidia, Hygrobatidae) from Thailand, Malaysia and Sulawesi (Indonesia), with the description of four new species Author Pesic, Vladimir Author Smit, Harry text Zootaxa 2009 2240 1 30 journal article 10.5281/zenodo.190536 d7ff8abd-bb96-4ea4-b61a-66aa70982a9b 1175-5326 190536 Atractides ( Atractides ) cf. tenuipalpis Lundblad, 1969 ( Figs. 14A–D ) Material. THAILAND : unnamed creek crossing track from watchtower, Khao Yai NP 11.xi.2007 , 14° 27.533 N 101° 20.386 E , leg. Smit, 0/1/0 (0/1/0 mounted). FIGURE 14A–D . Atractides tenuipalpis Lundblad, 1969 , female, unnamed creek crossing track from watchtower, Thailand: A = coxal and genital field; B = genital field; C = palp, medial view; D = I-Leg-5 and - 6. Scale bar = 100 μm. Morphology. General features. Integument dorsally striated. Muscle attachment plates unsclerotized. Genital field: Ac in triangular arrangement; excretory pore smooth; Vgl-1 separated from Vgl-2. Palp with a weak sexual dimorphism; P-2 ventral margin straight, sword seta of P-4 between ventral hair insertions. I- Leg: setae S-1 and -2 long, narrow setal interspace, S-1 slender, truncated at tip, S-2 slightly enlarged in the middle, with pointed tip; I-Leg-6 slender, slightly thickened basally, distally narrowed. Female: Idiosoma L/W 663/519. Coxal field ( Fig. 14A ): L 256, Cx-3 W 297, Cx-1+2 Ml 88, Cx-1+2 lL 184. Palp ( Fig. 14C ): total L 234, dL and %L (in parentheses): P-1 23 (9.8), P-2 47 (20.1), P-3 55 (23.5), P-4 82 (35.0), P-5 27 (11.5); L P-2/P-4 0.57. Genital field ( Fig. 14B ): L 118, genital plate 67-71, L Ac-1-3: 24: 24- 27: 27. I-Leg ( Fig. 14D ): I-Leg-5 dL 129, vL 100, dL/vL 1.29, HB 42, dL/HB 3.1, S-1 L 96, L/ W 12.6 , S-2 L 92, L/ W 10.0 , distance of sword setae at I-Leg-5 8, L S-1/2 1.04; I-Leg-6 L 108, HB 13, L/HB 8.3; L I-Leg-5/6 1.19. Remarks. Due to the similar shape of palp (weak sexual dimorphism of P-2) and I-Leg (setae S-1 and -2 long, with short setal interspace, S-1 slender, truncated at tip, S-2 slightly enlarged in the middle, with pointed tip; I-Leg-6 slender, slightly thickened basally and narrowed distally), the specimens from Thailand show general conformity with Atractides tenuipalpis Lundblad, 1969 from Burma . However, due to the fact that we do not have male specimens, this is only a tentative assignment based mainly on the approved non-identity with the alternative species. Distribution. Burma ( Lundblad 1969 ). New for Thailand .