Torrenticola minuta ( Lundblad, 1941 )

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

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.4927707

persistent identifier

http://treatment.plazi.org/id/F535879E-7E74-FFD1-FF0D-FDD9D6BCF84C

treatment provided by

Felipe

scientific name

Torrenticola minuta ( Lundblad, 1941 )
status

 

Torrenticola minuta ( Lundblad, 1941)  

( Figs. 11A–D View FIGURE 11 , 16A–B View FIGURE 16 , 17A–B View FIGURE 17 , Fig. 23E View FIGURE 23 )

Atractides minutus Lundblad 1941: 99   .

New records. Malaysia, Borneo , stream Kemantis , Sayap , Mt Kinabalu , 6º09.841 N, 116º33.936 E, alt. 928 m asl., 16.ix.2012 Smit 2[one juvenile]1/0 (1/0/0 mounted); Mahua stream, Mahua, GoogleMaps   Crocker Range, 5º47.838 N, 116º24.510 E, alt. 1052 m asl., 21.ix.2012 Smit 2/0/0 (1/0/0 mounted); Kibamabangan River, GoogleMaps   Crocker Range, 5º51.28 N, 116º08.417 E, alt. 433 m asl., 18.ix.2012 Smit 2/1/0; Great Lumotok stream, GoogleMaps   Mt Kinabalu, 6º09.336 N, 116º08.417 E, alt. 433 m asl., 18.ix.2012 Smit 0/1/0 (mounted) GoogleMaps   .

Morphology

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. 16A–B 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 on the level with Vgl–2; gnathosoma with curved ventral margin; P-2 longer than P-4, P-2 ventral margin slightly convex, P-2 ventrodistal protrusion, bluntly pointed, curved towards distal; P-3 ventrodistal protrusion bluntly pointed; P-4 with well developed ventral protuberances, ending in two tips separated by a concavity ( Figs. 11C–D View FIGURE 11 ). Male: medial suture line of Cx-II+III short; genital field subrectangular in shape; ejaculatory complex conventional in shape ( Fig. 23E View FIGURE 23 ). Female: genital field pentagonal in shape.

Measurements

Male (from stream Kemantis)—Idiosoma (ventral view: Figs. 11A View FIGURE 11 , 17A View FIGURE 17 ) L 628, W 459; dorsal shield ( Fig. 16A View FIGURE 16 ) L 511, W 413, L/W ratio 1.24; dorsal plate L 481; frontal plate L 127–128, W 44, L/W ratio 2.9. Gnathosomal bay L 125, Cx-I total L 266, Cx-I mL 142, Cx-II+III mL 58; ratio Cx-I L/Cx-II+III mL 4.6; Cx-I mL/ Cx-II+III mL 2.5. Genital field L/W 119/100, ratio 1.19; ejaculatory complex L; distance genital field-excretory pore 114, genital field-caudal idiosoma margin 183. Gnathosoma vL 293; chelicera total L 339; palp total L 289–291, dL/H, dL/H ratio: P-1, 31/31, 1.0; P-2, 101-102/55, 1.86; P-3, 52/46, 1.13; P-4, 88-89/28, 3.2; P-5, 17/9, 1.85; P-2/P-4 ratio 1.15.

Female (from Great Lumotok stream)—Idiosoma (ventral view: Figs. 11B View FIGURE 11 , 17B View FIGURE 17 ) L 625, W 459; dorsal shield ( Fig. 16B View FIGURE 16 ) L 497, W 412, L/W ratio 1.2; dorsal plate L 469; frontal plate L 128, W 41, L/W ratio 3.2. Gnathosomal bay L 130, Cx-I total L 266, Cx-I mL 136, Cx-II+III mL 37.5; ratio Cx-I L/Cx-II+III mL 7.1; Cx-I mL/Cx-II+III mL 3.6. Genital field L/W 129/114, ratio 1.13; distance genital field-excretory pore 113, genital field-caudal idiosoma margin 191. Gnathosoma vL 314; chelicera total L 358; palp total L 296–297, dL/H, dL/H ratio: P-1, 34/ 29, 1.16; P-2, 101-102/57, 1.78; P-3, 54/48, 1.13; P-4, 90/28, 3.25; P-5, 17/10, 1.7; P-2/P-4 ratio 1.13.

Remarks. Wiles (1999) reported T. minuta   from several sites in the catchment area of the River Temburong in North Brunei. He mentioned that his specimens differ from those from Peninsular Malaysia in having Cxgl-4 more posteriorly located, near I-L insertion, instead of being subapical (located just posterior of Cx-I tips).

Distribution. Sulawesi ( Wiles 1997), Borneo ( Wiles 1999, our study).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Trombidiformes

Family

Torrenticolidae

Genus

Torrenticola

Loc

Torrenticola minuta ( Lundblad, 1941 )

Pešić, Vladimir & Smit, Harry 2014
2014
Loc

Atractides minutus

Lundblad, O. 1941: 99
1941