Psechrus jaegeri Bayer, 2012

Bayer, Steffen, 2014, Seven new species of Psechrus and additional taxonomic contributions to the knowledge of the spider family Psechridae (Araneae), Zootaxa 3826 (1), pp. 1-54 : 20-21

Psechrus jaegeri Bayer, 2012

Figs 25 C, 26C

Psechrus jaegeri Bayer 2012: 90 , figs 48a–d, 49a–g, 50f, 81g, 83c, 85n, 88n, 91n (Description & illustration of ♂ and ♀).

Material examined (1 ♂, 1 s.a. ♂): LAOS: Champasak Prov.: Bolaven Plateu , Muang Bachieng , Ban Lak 35, That I-Tou, 15°11'37.7''N, 106°06'06.3''E, 810 m, coffee plantation with remnants of secondary forest, in vegetation, P. Jäger leg. at night, 16.XI.2012, ♂ ( SB 1248 ), s.a. ♂ ( SB 1249 ), SMF 64074 .

Remarks. In Bayer (2012) only one male of this species was available for examination. To provide readers with some appreciation of the intraspecific variation a description of the male listed above and images of its copulatory organ ( Figs 25 C, 26C) are given.

Description. Male: Body and eye measurements: Carapace length 7.0, maximal carapace width 4.8, anterior width of carapace 2.9, opisthosoma length 10.2, opisthosoma width 3.6. Eyes: AME 0.37, ALE 0.43, PME 0.44, PLE 0.44, AME–AME 0.16, AME–ALE 0.04, PME–PME 0.22, PME–PLE 0.34, AME–PME 0.61, ALE–PLE 0.39, clypeus height at AME 0.86, clypeus height at ALE 0.76.

Cheliceral furrow with three promarginal and four retromarginal teeth.

Spination: Palp: 131, 0 10, 1101 (all spines less than half as long as those on palpal femur); legs: femur I 566{555}, II 556{566}, III–IV 555; patella I–IV 000; tibia I–II 3038, III 3034, IV 3036{3035}; metatarsus I–IV 3035.

Measurements of palp and legs: Palp 8.5 [3.2, 1.4, 1.1, 2.8], I 57.4 [15.1, 3.2, 15.7, 16.5, 6.9], II 46.3 [12.7, 2.9, 12.2, 13.0, 5.5], III 32.2 [9.5, 2.2, 7.9, 8.8, 3.8], IV 48.5 [13.2, 2.6, 12.6, 14.2, 5.9]. Leg formula: 1423. FEMI+MTT-I/CL=4.51. Thus, legs short to medium-sized. In males of the himalayanus -group this value is usually slightly higher (on average ca. 5).

Palpal femur without modification and virtually straight.

Intraspecific variation of male copulatory organs: This male only shows slight differences to the paratype male ( Bayer 2012, figs 48a–d, 50f, 85n). In comparison to the paratype male the position of the conductor of the present male seems slightly shifted retrolaterally ( Figs 25 C). The shape and position of the embolus is similar to that of the paratype male.

Colouration. As described in Bayer (2012, p. 94), but in the new male the lateral bands on carapace are not distinctly narrow (ca. 1.25 diameter of PME).

Distribution. Laos, Thailand.

Figures

FIGURE 25. Psechrus spp., photographic images of male pedipalps, ventral view. A. Psechrus rani. B. Psechrus arietinus sp. nov. (only bulb shown). C. Psechrus jaegeri. D. Psechrus insulanus sp. nov.. E. Psechrus ampullaceus sp. nov.. F. Psechrus obtectus. A. SB 1232, MHNG, from Ba Vi, Ha Noi Prov., Vietnam. B. Paratype SB 1186, AMNH, from Tra My, Quang Nam Prov., Vietnam. C. SB 1248, SMF 64074, from That I-Tou, Champasak Prov., Laos. D. Holotype (SB 1247, MHNG) from Ko Surin Nua, Phang Nga Prov., Thailand. E. Paratype SB 1241, MHNG, from Sa Pa, Lao Cai Prov., Vietnam. F. SB 1236, MHNG, from Doi Ngo, Bac Giang Prov., Vietnam.