Torrenticola tetrapora ( Viets, 1935 )

Pesic, Vladimir & Smit, Harry, 2009, Water mites of the family Torrenticolidae Piersig, 1902 (Acari: Hydrachnidia) from Thailand, Part I. The genera Torrenticola Piersig, 1896, Neoatractides Lundblad, 1941 and Pseudotorrenticola Walter, 1906, Zootaxa 1982, pp. 38-62 : 45-47

Torrenticola tetrapora ( Viets, 1935)

( Figs. 37–41)

Material. Thailand, stream near Haewsai Waterfall , Nam Nao NP, alt. 425 m, 16.xi.2007, 16° 40.668 N 101° 41.856 E, leg. Smit (1/0/0) , dissected and slide mounted in Hoyer's fluid; stream W of Bankrang Camp, Kaeng Krachan NP, 30.xi.2007, 12° 48.106 N 99° 26.786 E, leg. Smit (2/0/0).

Morphology. Male: Idiosoma (ventral view: Fig. 38) L 669, W 519; dorsal shield ( Fig. 37) L 556, W 406, L/W ratio 1.37; dorsal plate 531; shoulder plate L 144, W 55, L/W ratio 2.6; frontal plate L 119, W 47, L/W ratio 2.5; shoulder/frontal plate L ratio 1.2; gnathosomal bay L 150, Cx-1 total L 256, Cx-1 medial L 106, Cx- 2+3 medial 78; ratio Cx-1 L/Cx-2+3 medial L 3.3; Cx-1 medial L/Cx-2+3 medial L 1.4; genital field L/W 144/122, L/W ratio 1.2, ejaculatory complex ( Fig. 40) L 209; distance genital field–excretory pore 128, genital field–caudal idiosoma margin 184; capitulum ( Fig. 41) ventral L 256; chelicera L 314; palp ( Fig. 39) total L 274, L and %L (in parentheses): P-1 33 (12.0), P-2 86 (31.4), P-3 50 (18.3), P-4 88 (32.1), P-5 17 (6.2); P-2/ P-4 ratio 0.98; ventral projections of P-2 and P-3 blunt, ventral protuberances of P-4 ending in two tips separated by a concavity.

Remarks. This species is characterised by the position of Cxgl-4 anterior to, and close to Cxgl-2 and Cx- 4 posteriorly extended well beyond genital field in both sexes.

Distribution. Sumatra, Peninsular Malaysia, Burma, India. New for Thailand.