Selenops muehlmannorum, Jäger, Peter & Praxaysombath, Bounthob, 2011

Jäger, Peter & Praxaysombath, Bounthob, 2011, Selenops muehlmannorum spec. nov. from Southern Laos (Araneae: Selenopidae), Zootaxa 2883, pp. 65-68 : 65-68

Selenops muehlmannorum spec. nov.

Figs 1–14

Type material. Holotype: Male, Laos, Champasak Province, Muang Pathoumphone, 2.5 km S of Pakse, Vat Phou Salao, N 15°05´38.8´´, E 105°48´34.6´´, 149 m altitude, secondary forest, dry bed of stream, rocks, by hand, at night, 23 November 2009, P. Jäger & S. Bayer leg. ( SMF).

Paratypes: 1 male, 1 female ( SMF), same data as for holotype (tissue sample for molecular analysis available—SD 696: male, two legs; SD 680: female, 1 leg).

Further material examined: 1 juvenile ( SMF), same data as for holotype.

Etymology. The species is named in honour of family Mühlmann from Germany for supporting the systematic research, description of biodiversity and nature conservation in Laos; noun in genitive case plural.

Diagnosis. Males can be recognised by having 1. a massive RTA making palpal tibia distinctly wider than long, 2. median apophysis with two apices, the distal one hook-shaped, the retrolateral one tapering, and 3. embolus broad and blunt ( Figs 1–4 ). Female epigyne similar to that of S. ollarius Zhu, Sha and Chen, 1990 (see Zhu et al. 1990), but 1.

lateral lobes closer together and wider, 2. epigynal field wider than long and without undulated epigynal furrows ( Figs 5– 7 , 13 ).

Description. Male (holotype, with data of paratype in parentheses): PL 4.7 (3.7), PW 5.2 (4.3), AW 2.5 (1.9), OL 5.4 (5.0), OW 3.9 (3.3). Eye diametres: AME 0.31, ALE 0.21, PME 0.30, PLE 0.46. Eye interdistances: AME–AME 0.19, AME–PME 0.10, ALE–PLE 0.21. Leg and pedipalpus measurements: pedipalpus 5.1 (1.4, 0.8, 1.3, -, 1.6); leg I 19.9 (5.5, 2.5, 5.6, 4.4, 1.9); leg II 22.5 (6.6, 2.5, 6.6, 5.0, 1.8); leg III 22.1 (7.2, 2.3, 6.2, 4.6, 1.8); leg IV 20.0 (6.8, 2.1, 5.2, 4.2, 1.7); leg formula 2341. Spination: Femur I p110, d111, r001, II–III d111; Tibia I r110, v2221, II r100, v2220, III v1200, IV 1100; Metatarsus I v120, II v220, III v200. Chelicerae with 3 anterior and 2 posterior teeth.

Palp as in diagnosis. Tibia short, RTA with short and broad ventral part and slender dorsal branch. Cymbium subcircular. Embolus arising in 8-o’clock-position, median apophysis in 4-o’clock-position, and conductor 2-o’clockposition; the latter with concave retrolateral margin ( Figs 1–4 ).

Colouration in ethanol ( Figs 8–9 ). Dorsal prosoma light reddish brown, indistinct pattern of marginal and central patches. Ventral prosoma and opisthosoma yellowish brown without pattern. Legs yellowish brown; femora and tibiae with each two dark annulate patches, the latter not continued ventrally; distal femora with small dark patch. Dorsal opisthosoma mottled with dark and bright irregular patches. For colour pattern of living specimens see Fig. 10 .

Female (paratype): PL 4.0, PW 4.4, AW 2.1, OL 6.3, OW 4.1. Eye diametres: AME 0.28, ALE 0.18, PME 0.29, PLE 0.40. Eye interdistances: AME–AME 0.20, AME–PME 0.06, ALE–PLE 0.24. Leg and pedipalpus measurements: pedipalpus 3.9 (1.1, 0.7, 1.0, -, 1.1); leg I 13.7 (4.1, 1.7, 4.0, 2.7, 1.2); leg II 16.3 (5.2, 2.0, 4.6, 3.1, 1.4); leg III 16.2 (5.6, 1.7, 4.4, 3.2, 1.3); leg IV 14.3 (5.1, 1.5, 3.8, 2.6, 1.3); leg formula 2341. Spination (as in male, only exceptions given): Femur I p1100, d111; Tibia I V2220, II v2220, III v1100, Metatarsus I v220, III v100. Chelicerae with 3 anterior and 2 posterior teeth ( Fig. 12 ). Palpal claw with 11 teeth. Copulatory organ as in diagnosis. Lateral lobes each with one median pocket, and strongly arched in posterior view. Internal duct system short and simple, in posterior view with a distinct Vshaped part (arrow) ( Figs 5–7 , 13 ).

Colouration as in male, but pattern of dorsal prosoma more distinct and ventral opisthosoma grey. For colour pattern of living specimens see Fig. 11 .

Natural history. The holotype of Selenops muehlmannorum spec. nov. has been collected on a wall of a staircase of a temple (Vat Phou Salao), both paratypes from rocks in a dry stream bed in a forest ( Fig. 14 ).

Distribution. Known only from the type locality.

Figures

FIGURES 1 – 7. Selenops muehlmannorum spec. nov. from Southern Laos, Champasak Province, Phou Salao (1 – 4 Holotype male; 5 – 7 Paratype female). 1 – 4 Left male palp (1 prolateral, 2 ventral, 3 retrolateral, 4 tibia, dorsal); 5 – 6 Epigyne (5 ventral, 6 posterior; arrow pointing to V-shaped part of internal duct system); 7 Vulva, dorsal. C—Conductor, E—Embolus, MA—median apophsyis.

FIGURES 8 – 14. Selenops muehlmannorum spec. nov. from Southern Laos, Champasak Province, Phou Salao (8 – 10 Holotype male; 11 – 13 Paratype female). 8 – 9 Habitus in ethanol (8 dorsal, 9 ventral); 10 – 11 Habitus of live specimens in original habitat, dorsal; 12 Chelicerae, ventral; 13 Epigyne, ventral; 14 Phou Salao, dry stream bed with rocks where paratypes were collected.