Torrenticola kinabaluensis, Pešić & Smit, 2014

Pešić, Vladimir & Smit, Harry, 2014, Torrenticolid water mites (Acari: Hydrachnidia: Torrenticolidae) from Malaysian Borneo, Zootaxa 3840 (1), pp. 1-72 : 8-11

Torrenticola kinabaluensis n. sp.

( Figs. 4A–E , 5A–B , 9C–D , 10C–E , 23B )

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 . Paratypes: one male, same data as holotype ; two males, one female, Little Lumotok stream, Sayap, Mt Kinabalu, 6º09.497 N, 116º34.027 E, alt. 1065 m asl., 17.ix.2012 Smit , one male and one female dissected and slide mounted; one male, Mahua river , upstream, 5º47.939 N, 116º24.317 E, 1050 m asl., 21.ix.2012 Smit .

Further records. Malaysia, Borneo : Great Lumotok stream, Mt Kinabalu , 6º09.336 N, 116º08.417 E, alt. 433 m asl., 18.ix.2012 Smit 0/1/0; unnamed stream Bansadon Trail , Inobong , Crocker Range , 5º51.456 N, 116º68.403 E, 18.ix.2012 Smit 0/1/0; Kipungit River , Poring Hot Springs , Mt. Kinabalu , 6º02.776 N, 116º41.432E, 568 m asl., 15.ix.2012 Smit 1/0/0; Kibamabangan River, Crocker Range, 5º51.28 N, 116º08.417 E, 433 m asl., 18.ix.2012 Smit 0/2[one juvenile]/0 .

Diagnosis. Idiosoma elongated (dorsal shield L/W ratio 1.5); shoulder platelets fused to the large dorsal plate; Cxgl–4 far posterior at margin of Cx-I/II, between I–L and II–L insertions, but closer to I–L insertion; P-2 with a laterally compressed, longish (> 30% of ventral margin), anteriorly directed ventrodistal extension.

Description

General features —Idiosoma elongated; shoulder platelets fused to the large dorsal plate; dorsal shield with colour pattern as illustrated in Figs. 9C–D ; gnathosomal bay U-shaped, proximally rounded; Cxgl–4 far posterior at margin of Cx-I/II, between I–L and II–L insertions, but closer to I–L insertion; suture lines of Cx-IV extending posteriorly beyond posterior margin of genital field, laterally curved; excretory and Vgl-2 pore away from the line of primary sclerotization, excretory pore slightly anterior, or on the level with Vgl-2; gnathosomal rostrum long, ventral margin in lateral view curved ( Fig. 4E ); P-2 shorter than P-4 (L P-2/P-4 ratio 0.9), ventral margin of P-2 distally with a laterally compressed, longish (>30% of ventral margin), anteriorly directed and apically serrated hyaline extension and a very short, denticle-like seta laterally at base of projection; P-3 with a shorter, subrectangular, apically serrated ventrodistal projection, and a moderately long seta laterally at base of projection; P-4 slender, with ventral tubercles pointed and separated, bearing one long and three short setae ( Figs. 4C–D ). Male: medial suture line of Cx-II+III relatively long; genital field subrectangular; ejaculatory complex conventional in shape ( Fig. 23B ). Female: genital field pentagonal in shape.

Measurements

Male (holotype)—Idiosoma (ventral view: Figs. 4B ) L 600, W 387; dorsal shield ( Figs. 4A , 9C ) L 492, W 336, L/W ratio 1.46; dorsal plate L 457; frontal plate L 119, W 41–43, L/W ratio 2.8–2.9. Gnathosomal bay L 108, Cx-I total L 214, Cx-I mL 106, Cx-II+III mL 109; ratio Cx-I L/Cx-II+III mL 2.0; Cx-I mL/Cx-II+III mL 0.97. Genital field L/W 103/87, ratio 1.19; distance genital field-excretory pore 128, genital field-caudal idiosoma margin 172. Gnathosoma vL 281; chelicera total L 319; palp total L 252, dL/H, dL/H ratio: P-1, 28/23, 1.2; P-2, 76/42, 1.8; P-3, 48/38, 1.27; P-4, 85/20, 4.2; P-5, 15/11, 1.35; P-2/P-4 ratio 0.90.

Female (paratype from Little Lumotok stream)—Idiosoma (ventral view: Figs. 5A , 10E ) L 703, W 418; dorsal shield ( Fig. 9D ) L 553, W 364, L/W ratio 1.52; dorsal plate L 510; frontal plate L 131–137, W 45–47, L/W ratio 2.9. Gnathosomal bay L 151, Cx-I total L 270, Cx-I mL119, Cx-II+III mL 103; ratio Cx-I L/Cx-II+III mL 2.62; Cx-I mL/Cx-II+III mL 1.16. Genital field L/W 136/114, ratio 1.19; distance genital field-excretory pore 143, genital field-caudal idiosoma margin 192. Gnathosoma vL 334; chelicera total L 378; palp total L 282, dL/H, dL/H ratio: P-1, 32/28, 1.17; P-2, 90/52, 1.73; P-3, 51/42, 1.21; P-4, 94/23, 4.1; P-5, 15/12, 1.25; P-2/P-4 ratio 0.96.

Etymology. Named after the mountain (Kinabalu) where the new species was found.

Discussion. See discussion under T. borneoensis .

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

Distribution. Borneo.

Figures

FIGURE 4A–E. Torrenticola kinabaluensis n. sp., holotype male, Mahua stream: A = dorsal shield; B = idiosoma, ventral view; C = palp, medial view; D = palp, lateral view; E = gnathosoma and chelicera. Scale bars = 100 µm.

FIGURE 5A–B. Torrenticola kinabaluensis n. sp., paratype female, Little Lumotok stream: A = idiosoma, ventral view; B = palp, lateral view. Scale bars = 100 µm.

FIGURE 9A–I. Photographs of dorsal shield. A–B Torrenticola borneoensis n. sp., Kemantis stream: A = male holotype; B = female paratype. C–D T. kinabaluensis n. sp.: C = male holotype; D = female paratype, Little Lumotok stream. E–F T. longipalpis Wiles, 1997, male, Mahua stream. G–I T. sabahensis n. sp.: G = male holotype; H = male, Little Lumotok stream; I = female paratype, Great Lumotok stream.

FIGURE 10A–I. Photographs of ventral shield. A–B Torrenticola borneoensis n. sp., Kemantis stream: A = male holotype; B = female paratype. C–E T. kinabaluensis n. sp.: C = male holotype; D = male paratype, Little Lumotok stream; E = female paratype, Little Lumotok stream. F T. longipalpis Wiles, 1997, male, Mahua stream. G–I T. sabahensis n. sp.: G = male holotype; H = male, Little Lumotok stream; I = female paratype, Great Lumotok stream.

FIGURE 23A–H. Photographs of ejaculatory complex. A Torrenticola borneoensis n. sp. B T. kinabaluensis n. sp.. C T. longipalpis Wiles, 1997. D T. sabahensis n. sp. E Torrenticola minuta (Lundblad, 1941). F T. neoindica n. sp. G Neoatractides uniscutatus n. sp. H Pseudotorrenticola borneoensis n. sp.

FIGURE 43A–D. Photographs of selected sampling sites: A—Mahua stream (type locality of Torrenticola kinabaluensis n. sp. and sampling site of Torrenticola borneoensis n. sp., T. sabahensis n. sp., T. minuta, T. neoindica n. sp., T. cf. pugionirostris, Monatractides longiventris, M. parviventris and M. morpheus n. sp.), B—Unnamed stream Bansadon Trail (type locality of Neoatractides uniscutatus n. sp. and sampling site of Torrenticola borneoensis n. sp., T. kinabaluensis n. sp., Monatractides cf. macroporus and M. parviventris). C—Kibamabangan River (type locality of Torrenticola schilthuizeni n. sp. and sampling site of Torrenticola borneoensis n. sp., T. kinabaluensis n. sp., T. minuta and T. neoindica n. sp., Monatractides cf. macroporus, M. oxystomus, M. parviventris and M. morpheus n. sp.). D—Kemantis stream (type locality of Torrenticola borneoensis n. sp., Neoatractides sundaensis n. sp. and Monatractides phantasos n. sp. and sampling site of T. minuta, Monatractides longiventris, M. parviventris and M. morpheus n. sp.). Photos. H. Smit.