Monatractides papillatus ( Smit, 1996 )

Pešić, Vladimir & Smit, Harry, 2011, Water mites of the genus Monatractides Viets (Acari: Hydrachnidia, Torrenticolidae) from New Guinea, with descriptions of nine new species, Zootaxa 2779, pp. 39-62 : 61

Monatractides papillatus ( Smit, 1996)

( Fig. 18 )

Material examined. Holotype male, Torrenticola papillata, River Rumei, Waigeo , Indonesia, 17.x.1993, leg. M. Argeloo (slide INDON 31, ZMAN).

Morphology. Male (in parentheses measurements taken from the original description): Idiosoma (ventral view: Fig. 18B ) L 766, W 691; dorsal shield ( Fig. 18A ) L 706, W 509, L/W ratio 1.39; dorsal plate 644 (689); shoulder plate L 209 (204-213), W 97, L/W ratio 2.2; frontal plate L 138-141 (132), W 75-78, L/W ratio 1.8-1.84; shoulder/frontal plate L ratio 1.48; capitular bay L 128; Cx-1 total L 233 (233), Cx-1 medial L 103, Cx-2+3 medial 55 (60); ratio Cx-1 L/Cx-2+3 medial L 4.2; Cx-1 medial L/Cx-2+3 medial L 1.87; genital field L/W 148 (155)/120 (126), L/W ratio 1.23; ejaculatory complex conventional in shape, L 178; distance genital field–excretory pore 176, genital field–caudal idiosoma margin 325; capitulum ventral L 181; chelicera total L 229; palp ( Fig. 18C ) total L 224, dL: P-1, 29 (29); P-2, 66 (67); P-3, 42 (43); P-4, 61 (58); P-5, 26 (26); L P-2/P-4 ratio, 1.08; P-4 with well developed setal tubercles; postgenital area large; excretory pore on the line of primary sclerotization, Vgl-2 posterior and well away from the excretory pore; L I-5-6 ( Fig. 18D ): 135 (127), 136 (108).

Remarks. Due to the broad frontal platelets (L/W 1.8), shoulder dorsal plates which are swollen anteriorly, and P-4 with large setal tubercles, Monatractides papillatus can be easily distinguished from the other members of this genus from New Guinea.

Distribution. Waigeo ( Indonesia).

Figures

FIGURE 18 A – D. Monatractides papillatus (Smit, 1996), male: A = dorsal shield; B = ventral shield; C = palp, medial view; D = I-L- 5 and - 6. Scale bars = 100 µm.