Monatractides papuensis sp. nov. (Figs. 3, 4B) Type series. Holotype, male, dissected and slide mounted; Indonesia, New Guinea, Papua Province: Bion River, upstream, Pass Valley, 15.iii.2010, 3˚ 51.294 S 139˚ 05.733 E, 1962 m a.s.l. Paratypes: 1/5 (1/1 mounted), same data as holotype; 0/1/0, Bion River, 15.iii.2010, 3˚ 51.513 S 139˚ 05.570 E, 2007 m a.s.l.; 1/3 (0/1 mounted), same data as holotype, 02.iii.2010, 3˚ 51.267 S 139˚ 05.789 E, 1962 m a.s.l. Further records: Indonesia, New Guinea, Papua Province, unnamed creek crossing road to Pass Valley, 13.iii.2010, 3˚ 52.849 S 139˚ 04.194 E, 2253 m a.s.l. 0/1. Diagnosis. Idiosoma dimensions large (L> 900 in male,> 1000 in female); idiosoma elongated (dorsal shield L/W 1.6 – 1.7); capitular bay rectangular at its proximal end; distal margins of P-3 bearing at least one denticle, P-4 with well developed tubercles near the insertion of the ventral hairs; Cx-4 with well accentuated posterior suture line; postgenital area large; excretory pore close to the line of primary sclerotization, Vgl-2 posterior and well away from the excretory pore. Description. Male (holotype, in parentheses paratype): Idiosoma (ventral view: Fig. 3B) L 931 (969), W 600 (625); dorsal shield (Fig. 3A) L 809 (825), W 478 (475), L/W ratio 1.69 (1.74); dorsal plate 769 (794); shoulder plate L 205 (200), W 74 (72), L/W ratio 2.77 (2.77); frontal plate L 144 (153), W 66 (61), L/W ratio 2.18 (2.5); shoulder/frontal plate L ratio 1.42 (1.31); capitular bay L 166 (184), W 94, L/W ratio 1.8; Cx-1 total L 297 (322), Cx-1 medial L 129 (134), Cx-2+3 medial 61 (52); ratio Cx-1 L/Cx-2+3 medial L 4.9 (6.2); Cx-1 medial L/Cx-2+3 medial L 2.1 (2.6); genital field L/W 184 (181)/139 (141), L/W ratio 1.32 (1.28); ejaculatory complex (Fig. 3F) L 197 (219); distance genital field–excretory pore 191 (197), genital field–caudal idiosoma margin 381 (398); capitulum (Fig. 3C) ventral L 214 (215); chelicera total L 262 (266); palp (Fig. 3D – E): total L 258 (260), dL: P-1, 32 (29); P-2, 73 (75); P-3, 50 (49); P-4, 69 (72); P-5, 34 (35); %L: P-1, 12.4 (8.1); P-2, 28.3 (28.9); P-3, 19.4 (18.9); P- 4, 26.7 (27.7); P-5, 13.2 (13.5); P-2/P-4 ratio, 1.06 (1.06); L I-L-4-6 (Fig. 3G): 129 (140), 147 (154), 143 (151). Female (from Bion River, upstream, n = 2): Idiosoma (ventral view: Fig. 4B) L 1013 – 1059, W 619; dorsal shield L 881 – 894, W 519 – 531, L/W ratio 1.68 – 1.7; dorsal plate 846 – 856; shoulder plate L 209 – 212, W 72 – 77, L/ W ratio 2.7 – 2.9; frontal plate L 153, W 62 – 63, L/W ratio 2.43 – 2.47; shoulder/frontal plate L ratio 1.37 – 1.39; capitular bay L 178, W 84, L/W ratio 2.1; Cx-1 total L 322 – 341, Cx-1 medial L 144 – 147, Cx-2+3 medial 33 – 37; ratio Cx-1 L/Cx-2+3 medial L 9.2 – 9.8; Cx-1 medial L/Cx-2+3 medial L 4.0 – 4.4; genital field L/W 203 – 209/169 – 172, L/W ratio 1.18 – 1.24; distance genital field–excretory pore 230, genital field–caudal idiosoma margin 444 – 453; capitulum ventral L 223 – 245; chelicera total L 275 – 284; palp: total L 267 – 288, dL and %L (in parentheses): P-1, 31 – 36 (11.6 – 12.5); P-2, 78 – 85 (29.2 – 29.5); P-3, 57 – 57 (19.8 – 21.3); P-4, 66 – 74 (24.7 – 25.7); P-5, 35 – 36 (12.5 – 13.1); L P-2/P-4 ratio, 1.15 – 1.18; L I-L-4-6: 135 – 142, 150 – 158, 149 – 154. Etymology. The species is named after the country where it was collected. Discussion. See discussion section under the preceeding species. Distribution. New Guinea.

Published as part of Pešić, Vladimir & Smit, Harry, 2011, Water mites of the genus Monatractides Viets (Acari: Hydrachnidia, Torrenticolidae) from New Guinea, with descriptions of nine new species, pp. 39-62 in Zootaxa 2779 on page 43, DOI: 10.5281/zenodo.207512