Torrenticola sabahensis Pešić & Smit 2014, n. sp.
Creators: name: Pešić, Vladimir
name: Smit, Harry
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Torrenticolidae
Torrenticola
Torrenticola sabahensis

description: Torrenticola sabahensis n. sp.
(Figs. 6A–E, 7A–B, 9G–I, 10G–I, 23D)
Type series. Holotype male, dissected and slide mounted, Malaysia, Borneo, Great Lumotok stream, Mt Kinabalu, 6º09.336 N, 116º08.417 E, alt. 433 m asl., 18.ix.2012 Smit. Paratypes: one juvenile male, one female, same data as holotype, female dissected and slide mounted.
Further records. Malaysia, Borneo: Little Lumotok stream, Sayap, 6º09.497 N, 116º34.027 E, alt. 1065 m asl., 17.ix.2012 Smit 6/1/0 (1/0/0 mounted); Mahua stream, Mahua, Crocker Range, 5º47.838 N, 116º24.510 E, alt. 1052 m asl., 21.ix.2012 Smit 1/1/0; first stream Minduk Sirung Trail, Alab, Crocker Range, 5º45.225 N, 116º26.085 E, alt. 752 m asl., 22.ix.2012 Smit 0/1/0.
Diagnosis. Idiosoma elongated-oval (dorsal shield L/W ratio 1.3–1.4); shoulder platelets fused to the large dorsal plate; dorsal shield without colour pattern; Cxgl–4 anteriorly adjacent to Cxgl–2, posterior at margin of CxI/II; suture lines of Cx-IV extending posteriorly beyond posterior margin of genital field; excretory pore on the level with Vgl–2. Male: medial suture line of Cx-II+III moderately long.
Description
General features —Idiosoma elongated-oval; shoulder platelets fused to the large dorsal plate; dorsal shield without colour pattern (Figs. 9G–I); gnathosomal bay U-shaped; Cxgl–4 anteriorly adjacent to Cxgl–2, posterior at margin of Cx-I/II; 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 on the level with Vgl–2; gnathosoma with curved ventral margin (Fig. 6E); P-2 nearly equal in length as P-4, P-2 ventral margin concave, P-2 ventrodistal protrusion bluntly pointed, curved towards distal; P-3 ventrodistal protrusion pointed and cone-shaped; P-4 with well developed ventral protuberances, ending in two tips separated by a concavity (Figs. 6D, 7B). Male: medial suture line of Cx-II+III moderately long; genital field subrectangular in shape; ejaculatory complex conventional in shape (Figs. 6C, 23D). Female: genital field pentagonal in shape.
Measurements
Male (holotype, in parentheses specimen from Little Lumotok stream)—Idiosoma (ventral view: Figs. 6B, 10G–H) L 678 (672), W 481 (478); dorsal shield (Figs. 6A, 9G–H) L 556 (539), W 405 (411), L/W ratio 1.37 (1.31); dorsal plate L 519 (503); frontal plate L 143 (144), W 50 (50–53), L/W ratio 2.9 (2.7–2.9). Gnathosomal bay L 131 (148), Cx-I total L 250 (272), Cx-I mL 119 (122), Cx-II+III mL 106 (94); ratio Cx-I L/Cx-II+III mL 2.36 (2.9); Cx-I mL/Cx-II+III mL 1.12 (1.3). Genital field L/W 130 (131)/107 (109), ratio 1.2 (1.2); ejaculatory complex L 162 (149); distance genital field-excretory pore 125 (109), genital field-caudal idiosoma margin 192 (173). Gnathosoma vL 303 (306); chelicera total L 378 (351); palp total L 300–301 (302), dL/H, dL/H ratio: P-1, 37/31, 1.2 (44/34, 1.29); P-2, 92/48, 1.94 (92/48, 1.92); P-3, 59–60/42, 1.42 (57/45, 1.28); P-4, 94/30, 3.1 (89/31, 2.9); P-5, 18/16, 1.1 (20/15, 1.3); P-2/P-4 ratio 0.98 (1.03).
Female (paratype from Great Lumotok stream)—Idiosoma (ventral view: Figs. 7A, 10I) L 755, W 559; dorsal shield (Fig. 9I) L 616, W 469, L/W ratio 1.31; dorsal plate L 575; frontal plate L 152–155, W 56, L/W ratio 2.7–2.8. Gnathosomal bay L 172, Cx-I total L 305, Cx-I mL 133, Cx-II+III mL 73; ratio Cx-I L/Cx-II+III mL 4.2; Cx-I mL/Cx-II+III mL 1.8. Genital field L/W 156/146, ratio 1.07; distance genital field-excretory pore 144, genital field-caudal idiosoma margin 220. Gnathosoma vL 363; chelicera total L 450; palp total L 351–352, dL/H, dL/H ratio: P-1, 51/38, 1.3; P-2, 111/57, 1.95; P-3, 68-69/48, 1.44; P-4, 103/32, 3.2; P-5, 18/17, 1.06; P-2/P-4 ratio 1.07.
Etymology. Named after the province (Sabah) where the new species was found.
Discussion. The new species is most similar to Torrenticola longipalpis Wiles, 1997 (see below). The latter species can easily be separated from T. sabahensis n. sp. due to the less slender idiosoma, the characteristic colour pattern (see Figs. 9E–F), Cxgl–4 shifted more anteriorly, at margin of Cx-I/II, the longer ventral seta on P-2, and in males, medial suture line of Cx-II+III shorter and suture lines of Cx-IV extending less posteriorly beyond posterior margin of genital field.
Habitat. Sandy/bouldery streams, shaded by rain forest (Fig. 43A).
Distribution. Borneo.
description: Published as part of Pešić, Vladimir & Smit, Harry, 2014, Torrenticolid water mites (Acari: Hydrachnidia: Torrenticolidae) from Malaysian Borneo, pp. 1-72 in Zootaxa 3840 (1) on pages 11-13, DOI: 10.11646/zootaxa.3840.1.1, http://zenodo.org/record/4927892