Torrenticola neoindica, Pešić & Smit, 2014

Pešić, Vladimir & Smit, Harry, 2014, Torrenticolid water mites (Acari: Hydrachnidia: Torrenticolidae) from Malaysian Borneo, Zootaxa 3840 (1), pp. 1-72: 20-22

publication ID

http://dx.doi.org/10.11646/zootaxa.3840.1.1

publication LSID

lsid:zoobank.org:pub:CDF827EB-8A66-438F-AC5C-07A7D3D83BB9

DOI

http://doi.org/10.5281/zenodo.5110171

persistent identifier

http://treatment.plazi.org/id/F535879E-7E77-FFD4-FF0D-FF2DD4A0FEE5

treatment provided by

Felipe

scientific name

Torrenticola neoindica
status

n. sp.

Torrenticola neoindica   n. sp.

( Figs. 12A–D View FIGURE 12 , 13A–D View FIGURE 13 , 16C–D View FIGURE 16 , 17C–D View FIGURE 17 , 23F View FIGURE 23 )

Type series. Holotype male, dissected and slide mounted, Malaysia, Borneo , Mahua stream, downstream of national park entrance, Crocker Range, 5º46.491 N, 116º25.770 E, alt. 865 m asl., 22.ix.2012 Smit GoogleMaps   . Paratypes: 3/ 4[one juvenile]/0 (+ 5/0 in ethanol), same data as holotype, one female dissected and slide mounted GoogleMaps   .

Further records. Borneo : Great Lumotok stream, Mt Kinabalu , 6º09.336 N, 116º08.417 E, alt. 433 m asl., 18.ix.2012 Smit 2/1[one juvenile]/0 (1/0/0 mounted); Mahua stream, Mahua, GoogleMaps   Crocker Range, 5º47.838 N, 116º24.510 E, alt. 1052 m asl., 21.ix.2012 Smit 0/3/1 (+ 4/0 in ethanol); Mahua stream at crossing with main road, GoogleMaps   Crocker Range, 5º45.225 N, 116º26.085 E, alt. 752 m asl., 22.ix.2012 Smit 3[one juvenile]/0/1; Kibamabangan River , GoogleMaps   Crocker Range, 5º51.28 N, 116º08.417 E, alt. 433 m asl., 18.ix.2012 Smit 1[juvenile]/0/0 (mounted); GoogleMaps   Little Lumotok stream, Sayap, 6º09.497 N, 116º34.027 E, alt. 1065 m asl., 17.ix.2012 Smit 0/1/0; small stream waterfall trail GoogleMaps   Inobong, 5º51.306 N, 116º08.292 E, alt. 482 m asl., 19.ix.2012 Smit 1/0/0; small stream Layang Layang, GoogleMaps   Mt Kinabalu, 6º02.711 N, 116º33.627 E, alt. 2697 m asl., 12.ix.2012 Smit 0/1/[juvenile]0; first stream Minduk Sirung Trail, Alab, GoogleMaps   Crocker Range, 5º45.225 N, 116º26.085 E, alt. 752 m asl., 22.ix.2012 Smit 4[one juvenile]/0/0; SilauSilau stream, upstream, GoogleMaps   Mt Kinabalu, 6º00.681 N, 116º32.417 E, alt. 1592 m asl., 2.ix.2012 Smit 1/1/0 (damaged) GoogleMaps   .

Diagnosis. Idiosoma elongated-oval (dorsal shield L/W ratio 1.2–1.4); shoulder platelets fused to the large dorsal plate; dorsal shield with colour pattern as illustrated in Figs. 16C–D View FIGURE 16 ; Cxgl-4 subapical, only slightly posterior of Cx-I tips; suture lines of Cx-IV extending posteriorly beyond posterior margin of genital field. Male: medial suture line of Cx-II+III short.

Description

General features —Idiosoma elongated-oval; shoulder platelets fused to the large dorsal plate; dorsal shield with colour pattern as illustrated in Figs. 16C–D View FIGURE 16 ; gnathosomal bay U-shaped; Cxgl-4 subapical, only slightly posterior of Cx-I tips; suture line of Cx-IV distinct, extending posteriorly beyond posterior margin of genital field; excretory and Vgl-2 pore away from the line of primary sclerotization, excretory pore slightly anterior or on the level with Vgl-2; gnathosoma with curved ventral margin; rostrum well developed ( Fig. 12D View FIGURE 12 ); P-2 longer than P-4, P-2 ventral margin slightly convex, distally with a subrectangular, anteriorly directed and apically serrated hyaline extension (covering less than 30% of ventral margin) and a short seta laterally at base of projection; P-3 with a shorter, subrectangular, apically serrated ventrodistal projection, and a long seta laterally at base of projection; P-4 stout, with ventral tubercles pointed and separated, bearing one long and three short setae ( Figs. 12C View FIGURE 12 , 13C–D View FIGURE 13 ). Male: medial suture line of Cx-II+III short; genital field subrectangular in shape; ejaculatory complex normal in shape ( Fig. 23F View FIGURE 23 ). Female: genital field pentagonal in shape.

Measurements

Male (holotype, in parentheses from Great Lumotok stream)—Idiosoma (ventral view: Figs. 12A View FIGURE 12 , 13B View FIGURE 13 , 17C View FIGURE 17 ) L 563 (596), W 411 (469); dorsal shield ( Fig. 13A View FIGURE 13 , 16C View FIGURE 16 ) L 477 (500), W 360 (404), L/W ratio 1.32 (1.24); dorsal plate L 453 (469); frontal plate L 105–111 (116–117), W 37–38 (44), L/W ratio 2.8–3.0 (2.6–2.7). Gnathosomal bay L 109 (109), Cx-I total L 231 (232), Cx-I mL 121 (123), Cx-II+III mL 62 (69); ratio Cx-I L/Cx-II+III mL 3.7 (3.4); Cx-I mL/Cx-II+III mL 2.0 (1.8). Genital field L/W 119 (130)/94 (98), ratio 1.27 (1.32); ejaculatory complex L 143 (177); distance genital field-excretory pore 116 (103), genital field-caudal idiosoma margin 150 (163). Gnathosoma vL 265 (305); chelicera total L 297 (328); palp total L 250 (271), dL/H, dL/H ratio: P-1, 28/26, 1.08 (32/29, 1.1); P-2, 86/50, 1.72 (95/48-49, 1.95); P-3, 46/45, 1.03 (48/45, 1.06); P-4, 72/26, 2.73 (80/25, 3.28); P-5, 18/12, 1.46 (16/11, 1.48); P-2/P-4 ratio 1.2 (1.18).

Female (paratype from Mahua stream, downstream of national park entrance)—Idiosoma (ventral view: Figs. 12B View FIGURE 12 , 17D View FIGURE 17 ) L 609, W 411; dorsal shield ( Fig. 16D View FIGURE 16 ) L 508, W 350, L/W ratio 1.45; dorsal plate L 481; frontal plate L 115, W 40, L/W ratio 2.9–3.1. Gnathosomal bay L 113, Cx-I total L 229, Cx-I mL 116, Cx-II+III mL 55; ratio CxI L/Cx-II+III mL 4.2; Cx-I mL/Cx-II+III mL 2.1. Genital field L/W 134/116, ratio 1.16; distance genital fieldexcretory pore 122, genital field-caudal idiosoma margin 191. Gnathosoma vL 281; palp total L 271, dL/H, dL/H ratio: P-1, 31/29, 1.06; P-2, 93/52, 1.78; P-3, 53/46, 1.16; P-4, 79/26, 3.0; P-5, 15/11, 1.44; P-2/P-4 ratio 1.18.

Etymology. Named after its similarity with T. indica   .

Discussion. The specimens from Borneo agree well in general morphology of the palp (P-2 and -3 with a subrectangular, anteriorly directed and apically serrated hyaline extensions) with Torrenticola indica Cook, 1967   , a species described from India ( Cook 1967). The latter species can be easily distinguished in a different colour pattern on the dorsal shield (see Cook 1967: fig. 222) and in the male having a longer medial suture line of CxII+III.

Wiles (1999) reported T. indica   from several sites in the catchment area of the Rivers Temburong and Belalong in Brunei Darussalem, without discussion on differences with the original description.

Habitat. Sandy/bouldery streams, shaded by rain forest ( Figs. 43A, C View FIGURE 43 ).

Distribution. Borneo.