Atractides (Atractides) sabahensis
- Dataset
- Water mites from Mount Kinabalu and the Crocker Range, Borneo, Malaysia (Acari: Hydrachnidia), with the description of 34 new species
- Rank
- SPECIES
- Published in
- Smit, Harry, Pešić, Vladimir (2014): Water mites from Mount Kinabalu and the Crocker Range, Borneo, Malaysia (Acari: Hydrachnidia), with the description of 34 new species. Zootaxa 3876 (1): 1-71, DOI: 10.11646/zootaxa.3876.1.1
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Arachnida
- order
- Trombidiformes
- family
- Hygrobatidae
- genus
- Atractides
- species
- Atractides sabahensis
description
Description. Integument dorsally striated, muscle insertions unsclerotized. Genital field: Ac in an obtuse triangle. Excretory pore smooth; vgl- 1 separate from vgl- 2. Palp (Figs. 14 C – D): Ventral margin of P 2 convex, P 3 proximally weakly concave, distally convex, P 4 elevated near insertion of proximoventral seta, sword seta between ventral setae. Legs: I-leg- 5 distally protruding near insertion S- 1, S- 1 and - 2 close to each other, S- 2 thicker than S- 1, I-leg- 6 curved, inflated proximally, from the centre to the claw furrow with parallel dorsal and ventral margins (Figs. 14 B, 15 A). Male: Genital field anterior margin slightly convex, posterior margin indented. Female: Genital field: genital plates slender, Ac- 3 smaller than Ac- 1 and - 3 (Fig. 15 D). Measurements. Male (holotype) — Idiosoma length / width 416 / 316; coxal field: length 256; Cx-III width 272; Cx-I + II medial length 103, lateral length 172; genital field length / width 77 / 91, length Ac 1 – 3: 23 – 27, 30 – 34, 29; ejaculatory complex length 76. Palp: Total length 225, dorsal length / height, dorsal length / height ratio: P 1, 22 / 20, 1.1; P 2, 49 / 37, 1.3; P 3, 54 / 34, 1.59; P 4, 71 / 20, 3.55; P 5, 29 / 11.5 / 2.55; length P 2 / P 4 ratio 0.68; capitulum ventral length 105; chelicera total length 139. Legs: I-leg- 5 dorsal length 129, ventral length 85, dorsal length / ventral length ratio 1.51, maximum height 43, dorsal length / maximum height 3.0, S- 1 length 72, length / width ratio 10.0, S- 2 length 60, length / width ratio 5.1, distance S- 1 - 2 11, length ratio S- 1 / 2 1.2; I-leg- 6 length 96, central height 17, length / central height ratio 5.5; length I-leg- 5 / 6 ratio 1.35. Female (paratype) — Idiosoma length / width 644 / 525; coxal field: length 300; Cx-III width 394; Cx-I + II medial length 117, lateral length 202; genital field length / width 140 / 146, genital plates length 100, length Ac 1 – 3: 35 – 36, 35 – 39, 29 – 32. Palp: Total length 277, dorsal length / height, dorsal length / height ratio: P 1, 25 / 25, 1.0; P 2, 57 / 40, 1.43; P 3, 72 / 33, 2.18; P 4, 89 / 21.5, 4.1; P 5, 34 / 14, 2.4; length P- 2 / P- 4 ratio 0.64; capitulum ventral length 109; chelicera total length 169. Legs: I-leg- 5 dorsal length 175, ventral length 116, dorsal length / ventral length ratio 1.51, maximum height 52, dorsal length / maximum height 3.4, S- 1 length 97, length / width ratio 9.0, S- 2 length 78, length / width ratio 5.2, distance S- 1 - 2 18, length ratio S- 1 / 2 1.24; I-L- 6 length 128, central height 18.5, length / central height ratio 6.9; length I-L- 5 / 6 ratio 1.37.
diagnosis
Diagnosis. Palp without sexual dimorphism, ventral margin P 2 convex, P 3 weakly concave proximally, distally convexly protruding, P 4 elevated near insertion of proximoventral seta; S- 1 and - 2 close to each other, S- 2 thicker than S- 1, I-L- 6 curved and relatively long (length ratio I-leg- 5 / 6 1.35 - 1.4).
discussion
Remarks. The new species closely resembles Atractides propatulus (K. Viets, 1935) (South Sumatra, K. Viets 1935) in the small S- 1 / 2 interspace, I-leg- 6 curved and stocky, and a palp without sexual dimorphism. The latter species can be distinguished by more slender palp segments, with almost straight ventral margins of P- 2 – 4 (compare Figs. 11 E and 14 C – D), and by a shorter and more stout I-L- 6 (Fig. 11 F). Malformation. I-leg of one female shows particular deformation (lacking sword setae S- 1 and - 2 — Fig. 15 B).
distribution
Distribution. Borneo.
etymology
Etymology. Named after the province (Sabah) where the new species was found.
materials_examined
Type series. Holotype male, dissected and slide mounted, Mahua stream at crossing with main road, Crocker Range, Borneo, Malaysia, 5 º 45.225 N 116 º 26.085 E, alt. 752 m asl., 22 - ix- 2012 (RMNH). Paratypes: 1 / 5 (1 juvenile) / 0, same data as holotype, one female dissected and slide mounted; 1 / 6 / 0, Mahua stream, downstream of national park entrance, Crocker Range, Borneo, Malaysia, 5 º 46.491 N 116 º 25.770 E, alt. 865 m asl., 22 - ix- 2012 (RMNH).
Name
- Homonyms
- Atractides (Atractides) sabahensis