Monatractides longiventris (K. Viets, 1939 )

Pešić, Vladimir & Smit, Harry, 2014, Torrenticolid water mites (Acari: Hydrachnidia: Torrenticolidae) from Malaysian Borneo, Zootaxa 3840 (1), pp. 1-72: 35-38

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Monatractides longiventris (K. Viets, 1939 )


Monatractides longiventris (K. Viets, 1939)  

( Figs. 28A–B View FIGURE 28 , 29A–B View FIGURE 29 , 30A View FIGURE 30 , Tab. 1 View TABLE 1 )

Atractides longiventris K. Viets 1939: 429   . Material   GoogleMaps examined. Malaysia, Borneo   GoogleMaps , Mahua   GoogleMaps stream, downstream of national park entrance, Crocker Range   GoogleMaps , 5º46.491 N, 116º25.770 E, alt. 865 m asl., 22.ix.2012 Smit 2/1/0 (1/1/0 mounted); Mahua stream, Mahua, Crocker Range, 5º47.838 N, 116º24.510 E, alt. 1052 m asl., 21.ix.2012 Smit 2/6/0; Mahua stream at crossing with main road, Crocker Range, 5º45.225 N, 116º26.085 E, alt. 752 m asl., 22.ix.2012 Smit 0/1(ov.)/0; Kipungit River   GoogleMaps , Poring Hot Springs, Mt Kinabalu   GoogleMaps , 6º02.776 N, 116º41.432 E, 568 m asl., 15.ix.2012 Smit 0/1/0; stream Kemantis, Sayap, Mt Kinabalu, 6º09.841 N, 116º33.936 E, alt. 928 m asl., 16.ix.2012 Smit 1/0/0; Great Lumotok stream, Mt Kinabalu, 6º09.336 N, 116º34.056 E, alt. 1087 m asl., 17.ix.2012 Smit 0/1/0.

Compared material

Monatractides longiventris (K. Viets, 1939)   : Holotype ♂, SMF 45744 View Materials Torrenticola longiventris   ♂, type, K.Viets 47716, Ost-Java, Idjen-Plateau, Goenoeng Blaoe, 1938 Lucht coll.


General features —Idiosoma elongated (dorsal shield L/W ratio 1.6-1.7); shoulder plates elongated (shoulder/ frontal plate L ratio 1.2-1.3); frontal margin with flat protrusions medial to the eyes; Cxgl-4 located far anteriorly, near tips of Cx-I; gnathosomal bay U-shaped; suture line of Cx-IV lightly accentuated, originating from lateral edge of genital field and extending posteriorly beyond posterior margin of genital field ( Figs. 29 View FIGURE 29 A-B); Vgl-2 posterior to excretory pore; P-2 and P-3 distal margins without pointed tips, P-4 without denticles near insertion of ventral setae. Male: medial margin of Cx-II/III relatively long; genital field subrectangular; ejaculatory complex normal in shape (proximal and distal arms and proximal chamber well developed, Fig. 30A View FIGURE 30 ); excretory pore and Vgl- 2 slightly away from the line of primary sclerotization, near posterior margin of idiosoma. Female: genital field pentagonal, anteriorly enlarged, laterally straight, tapering posteriorly ( Fig. 29B View FIGURE 29 ); excretory pore and Vgl- 2 located posterior to line of primary sclerification.

Remarks. The specimens from Borneo agree well in general morphology with Monatractides longiventris   , a species originally described from Java (K. Viets 1939). The original description was restricted to the male; a first description of the female from Central Java was given by Lundblad (1971). In comparison with the holotype, specimens examined in our study are smaller, but do not differ in proportions and general idiosoma and palp morphology ( Table 1 View TABLE 1 ).

Distribution. Java (“ Atractides longiventris ” K. Viets 1939   , “ T. longiventris ” Lundblad 1971   ). New for Borneo.














Monatractides longiventris (K. Viets, 1939 )

Pešić, Vladimir & Smit, Harry 2014

Atractides longiventris K. Viets 1939: 429

Viets, K. 1939: 429