Torrenticola longipalpis Wiles, 1997

Pešić, Vladimir & Smit, Harry, 2014, Torrenticolid water mites (Acari: Hydrachnidia: Torrenticolidae) from Malaysian Borneo, Zootaxa 3840 (1), pp. 1-72 : 13-17

Torrenticola longipalpis Wiles, 1997

( Figs. 8A–D , 9E–F , 10F , 23C )

Torrenticola longipalpis Wiles 1997: 215 .

New records. 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 1/0/0 (mounted) .

Morphology

Male. General features —Idiosoma roundish (dorsal shield L/W ratio 1.2); shoulder platelets fused to the large dorsal plate; dorsal shield with colour pattern as illustrated in Figs. 9E–F ; gnathosomal bay U-shaped, proximally pointed; Cxgl–4 far posterior at margin of Cx-I/II, near insertion of II-L; medial suture line of Cx-II+III short; suture line of Cx-IV distinct, medially starting from posterior margin of genital field in a right angle to the main idiosoma axis; genital field subrectangular in shape; ejaculatory complex conventional in shape (with well developed anterior keel and proximal arms— Figs. 8D , 23C ); excretory and Vgl–2 pore away from the line of primary sclerotization, excretory pore anterior to Vgl–2; gnathosoma with curved ventral margin; P-2 longer than P-4, P-2 ventral margin straight, P-2 and P-3 ventrodistal protrusions bluntly pointed and cone-shaped, P-4 with well developed ventral protuberances, ending in two tips separated by a concavity ( Fig. 8C ).

Measurements —Idiosoma (ventral view: Figs. 8B , 10F ) L 713, W 556; dorsal shield ( Figs. 8A , 9E–F ) L 584, W 485, L/W ratio 1.2; dorsal plate L 558; frontal plate L 130–141, W 47, L/W ratio 2.8–3.0. Gnathosomal bay L 167, Cx-I total L 320, Cx-I mL 153, Cx-II+III mL 56; ratio Cx-I L/Cx-II+III mL 5.7; Cx-I mL/Cx-II+III mL 2.7. Genital field L/W 159/128, ratio 1.25; ejaculatory complex L 223; distance genital field-excretory pore 119, genital field-caudal idiosoma margin 173. Gnathosoma vL 364; chelicera total L 402; palp total L 335, dL/H, dL/H ratio: P-1, 38-39/36, 1.07; P-2, 115/65, 1.79; P-3, 59/55, 1.08; P-4, 100/37, 2.7; P-5, 23/19, 1.22; P-2/P-4 ratio 1.15.

Remarks. Wiles (1999) reported T. longipalpis from several sites in the catchment area of the Rivers Temburong and Belalong in North Brunei. He mentioned that his specimens differ from those from Sulawesi in having Cxgl–4 closer to, but still anterior to Cxgl–2 and a slightly longer medial suture line of Cx-II+III. However, he considered that to be a case of intraspecific variability.

Distribution. Sulawesi ( Wiles 1997, Pešić & Smit 2011), Borneo ( Wiles 1999, our study).

Figures

FIGURE 8A–D. Torrenticola longipalpis Wiles, 1997, male, Mahua stream: A = dorsal shield; B = idiosoma, ventral view; C = palp, medial view; D = ejaculatory complex. 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.