Psechrus luangprabang Jäger, 2007

Bayer, Steffen, 2012, The lace-sheet-weavers — a long story (Araneae: Psechridae: Psechrus), Zootaxa 3379 (1), pp. 1-170 : 83-87

publication ID

https://doi.org/ 10.11646/zootaxa.3379.1.1

DOI

https://doi.org/10.5281/zenodo.6303170

persistent identifier

https://treatment.plazi.org/id/D0272654-FFD2-5815-FF20-2DF0FDD6418F

treatment provided by

Felipe

scientific name

Psechrus luangprabang Jäger, 2007
status

 

Psechrus luangprabang Jäger, 2007

Figs 43a–d View FIGURES 43 , 44a–e View FIGURES 44 , 45a–e View FIGURES 45 , 81d View FIGURES 81 , 83b View FIGURES 83 , 85l View FIGURES 85 , 88m View FIGURES 88 , 91m View FIGURES 91 , 93a View FIGURES 93

Psechrus luangprabang Jäger 2007: 45 View Cited Treatment , figs 48–53, 68–72 (Description of ♂ and ♀, illustration of ♂ and ♀). [Holotype ♂ (SB 1030) from LAOS: Luangprabang Province: Xieng Ngeun District, Ban Keng Koung [L15], N 19°40'58'', E 102°18'27'', 372 m, disturbed forest at riverside of Nam Khan, between rocks; P. Jäger & J. Altmann leg. 07.III.2006; SMF 56389 View Materials ; Paratypes: 1 ♂ (SB 1031), 2 ♀♀ (SB 1032, 1034) with same data as for holotype; SMF 56390 View Materials (SB 1031–1032), SMF 56392 View Materials (SB 1034); 1 ♂ (SB 1033) with same data as for holotype, but: leg. 08.III.2006; SMF 56391 View Materials , all type material examined]. Bayer and Jäger 2010: 72.

Additional material examined (13 ♂♂, 24 ♀♀, 6 s.a. ♂♂, 10 s.a. ♀♀, 5 juvs). LAOS: Luang Nam Tha Province: Nam Ha Protected Area |2|, N 21°06'43'', E 101°20'36.1'', 693 m, under bridge; P. Jäger leg. 06.III.2008; GoogleMaps 2 ♂♂ ( SB 21–22 ), SMF ( SB 21 ), MHNG ( SB 22 ). Nam Ha Protected Area |3|, N 21°08'17.6'', E 101°24'07.3'', 746 m, under bridge; P. Jäger leg. 06.III GoogleMaps .2008; 1 ♀ ( SB 6 ), SMF . Nam Ha Protected Area |6|, N 21°03'32.1'', E 101°24'03'', 590 m, under bridges; P. Jäger leg. 07. III GoogleMaps .2008; 3 ♂♂ (48, 53–54), 3 ♀♀ ( SB 49 , 51–52 ), 4 s.a. ♀♀ ( SB 50 , 56–58 ), SMF . Same data as above, but: P. Jäger & S. Bayer leg. 19.XI.2009; 1 ♂ ( SB 459 ), 2 s.a. ♂♂ ( SB 352 , 359 ), SMF . Ban Tavan |3| (near Luang Nam Tha), N 20°58'57.6'', E 101°29'38'', 586 m, small stream with steep slopes at both sides, between roots and stones; P. Jäger & S. Bayer leg. 18.XI.2009; 1 ♂ ( SB 402 ), 1 ♀ ( SB508 ), 1 juv. ( SB 356 ), SMF GoogleMaps . Oudomxai Province: Lipi Provincial Protected Area , ca. 3.7 km S of Oudomxai, N 20°39'39.8'', E 101°59'47.3'', 741 m, under rock; L. Nophaseud leg. 18. IV.2011; 2 ♀♀ ( SB 1143–1144 ), SMF GoogleMaps . Luang Prabang Province: Nong Khiao, near Tham Pathok Cave , N 20°33'05'', E 102°37'55'', ca. 350 m, between rocks and stones; P. Jäger & S. Bayer leg. 16.XI.2009; 1 ♂ ( SB 353 ), 1 s.a. ♀ ( SB 346 ), 1 s.a. ♂ ( SB 358 ), SMF GoogleMaps . Luang Prabang, Phou Si , N 19°53'23'', E 102°08'04'', ca. 300 m, small, dry secondary forest, between stones; P. Jäger & S. Bayer leg. 14.XI.2009; 1 juv. ( SB 360 ), SMF GoogleMaps . Xieng Ngeun District, Ban Keng Koung [L15], N 19°40'58'', E 102°18'27'', 372 m, disturbed forest at riverside of Nam Khan, between rocks; P. Jäger & J. Altmann leg. 07. III.2006; 1 s.a. ♂ ( SB 1035 ), SMF 56391 View Materials GoogleMaps . Same data as above, but: P. Jäger leg. by night 23. II.2008; 2 ♀♀ ( SB 41–42 ), SMF . Ban Ean, That Se [L 13], N 19°50'34'', E 102°13'07'', 304 m; P. Jäger & J. Altmann leg. 05. III.2006; 1 ♀ ( SB 1036 ), SMF GoogleMaps . Ban Pak Bak (at Nam Khan river), Houay Kho , N 19°44'09.1'', E 102°16'37.5'', 328 m, forest along stream; P. Jäger leg. by night 23. III.2007; 1 ♀ ( SB 61 ), SMF GoogleMaps . Ban Nong Di (at Nam Khan river ), N 19°41'03.5'', E 102°21'31.2'', 280 m, forest along stream, between stones; P. Jäger leg. by night 21. III.2007; 1 ♂ ( SB 67 ), 2 ♀♀ ( SB 68–69 ), SMF GoogleMaps . Vientiane Province: Ban Phoxay (near Vang Vieng ), N 19°00'44'', E 102°26'46'', 260 m, in tunnel underneath the road; P. Jäger, M. Sandner & F. Steinmetz leg. 14. III.2007; 3 ♀♀ ( SB 76 , 91–92 ), SMF GoogleMaps , except SB92 ( MHNG). Same data as above, but: P. Jäger leg. 14.III.2008; 1 ♀ ( SB 20 ), SMF . Same data as above, but: P. Jäger & S. Bayer leg. 12.XI.2009; 1 ♀ ( SB 424 ), 1 s.a. ♀ ( SB 362 ), 3 juvs ( SB 332 , 361 , 363 ), SMF . Ban Don Makhay (near Vientiane), N 18°05'04'', E 102°40'15'', ca. 180 m, secondary forest; P. Jäger leg. by night 01. IV.2011; 2 ♂♂ ( SB 997 , 1001 ), 2 ♀♀ ( SB 998 , 1002 ), 1 s.a. ♀ ( SB 1003 ), SMF GoogleMaps , 1 ♂ ( SB 999 ), 1 ♀ ( SB 1000 ), CJW . Bolikhamsay Province: Nam Kading National Protected Area, Tad Vang Fong training centre, N 18°20'28.8'', E 104°08'37.5'', 150 m, disturbed secondary forest, in hole of a tree trunk; P. Jäger & L. Nophasead leg. 23. III.2011; 1 ♀ ( SB 986 ), SMF GoogleMaps . Lak Sao , N 18°13'38'', E 104°44'47'', ca. 530 m, between rocks, near cave entrance; P. Jäger & S. Bayer leg. 09.XI.2009; 1 s.a. ♀ ( SB 375 ), SMF GoogleMaps . Lak Sao , N 18°13'09.4'', E 104°56'36.9'', 556 m, rock wall; P. Jäger & S. Bayer leg. by night 08.XI.2009; 1 s.a. ♀ ( SB 371 ), 1 s.a. ♂ ( SB 342 ), SMF GoogleMaps . Houay Khiao (W of Lak Sao), N 18°12'47.8'', E 104°49'51.5'', 500 m, paddy fields, between stones; P. Jäger & J. Martens leg. 04. III.2010; 2 ♀♀ ( SB 516–517 ), SMF GoogleMaps .

Revised diagnosis (see also diagnosis for himalayanus -group above). Males: Embolus base (EB) with particular flat, elongated, distally curved extension (distally means here the section directed to the proximal margin of T [tegulum]). T clearly broader than palpal tibia ( Fig. 43b View FIGURES 43 ). Females similar to P. demiror sp. nov. in the shape of anterior part of epigyne, actually the anterior (distal) margins of lateral lobes (LL). These strongly sclerotised, semicircular and extending anterio-laterally ( Fig. 44a View FIGURES 44 , 45a View FIGURES 45 , 47a View FIGURES 47 , 88l–m View FIGURES 88 ). Distinguished by the distal endings of margins of LL pointing posteriorly and by the two distinctly developed longitudinal edges below copulatory openings (CO) ( Figs 44a View FIGURES 44 , 45a View FIGURES 45 , 88m View FIGURES 88 ). Vulva similar to P.demiror sp. nov. Distinguished by the larger (in relation to copulatory duct) and differently shaped spermatheca ( Fig. 44b View FIGURES 44 , 45b View FIGURES 45 ).

Description. Male (measurements of holotype first, those of other specimens given as ranges in parentheses): Body and eye measurements. Carapace length 6.2 (5.7–8.4), carapace width 4.7 (4.1–6.1), anterior width of carapace 2.6 (2.2–3.2), opisthosoma length 8.8 (7.5–11.6), opisthosoma width 3.8 (2.8–4.0). Eyes: AME 0.32 (0.27–0.39), ALE 0.40 (0.35–0.44), PME 0.43 (0.37–0.47), PLE 0.42 (0.36–0.45), AME–AME 0.19 (0.17–0.20), AME–ALE 0.09 (0.04–0.09), PME–PME 0.22 (0.22–0.29), PME–PLE 0.30 (0.30–0.35), AME–PME 0.57 (0.49–0.58), ALE–PLE 0.43 (0.34–0.48), clypeus height at AME 0.77 (0.63–0.94), clypeus height at ALE 0.72 (0.58–0.92).

Cheliceral furrow with three promarginal and four retromarginal teeth.

Measurements of palp and legs. Leg formula: 1423. Palp 8.3 (7.2–10.0) [3.0 (2.8–3.6), 1.5 (1.2–1.7), 1.3 (1.2–1.7), 2.5 (2.0–3.0)], I 51.7 (46.0–66.8) [13.4 (11.5–17.2), 3.1 (2.6–4.1), 14.5 (13.0–19.0), 14.4 (12.8–18.9), 6.3 (5.8–7.6)], II 39.6 (35.5–51.6) [10.9 (9.7–14.0), 2.8 (2.2–3.5), 10.5 (9.4–14.0), 10.5 (9.4–14.4), 4.9 (4.7–5.7)], III 26.9 (24.0–35.5) [7.6 (7.0–10.4), 2.0 (1.8–2.6), 6.7 (5.7–8.8), 7.0 (6.2–9.4), 3.6 (3.3–4.3)], IV 42.1 (36.6–53.6) [11.2 (9.8–14.6), 2.4 (2.1–3.1), 10.5 (9.0–14.0), 12.2 (10.7–15.3), 5.8 (5.2–6.6)].

Spination. Palp: 131 (131), 110 (110), 1101 (1101); legs: femur I 566 (566), II 556 (566,567,667) III 555 (545), IV 554 (654); patella I–IV 000; tibia I–II 3038 (3038), III 3135{3034} (3136,3035), IV 3036 (3036,3037); metatarsus I–III 3035 (3035), IV 3036{3035} (3036,3035).

Palpal femur without modification, broadest distally ( Fig. 43d View FIGURES 43 ).

Copulatory organ (see also diagnosis and general description for himalayanus -group). Conductor (C) and embolus (E) long, slightly S-shaped. T appears partly divided subdistally due to a curved ridge ( Fig. 43b View FIGURES 43 ) and protruding quite distinctly out of cymbium alveolus ( Figs 43a,c View FIGURES 43 ). Palpal tibia in lateral view medium sized ( Fig. 43c View FIGURES 43 ). Cymbium dorsally with moderate dense scopula, covering 1/3 of cymbium ( Fig. 83b View FIGURES 83 ).

Female:

Body and eye measurements. Carapace length 6.6–9.8, carapace width 4.4–7.3, anterior width of carapace 2.7–4.1, opisthosoma length 10.9–14.4, opisthosoma width 4.6–6.9. Eyes: AME 0.34–0.39, ALE 0.42–0.47, PME 0.42–0.48, PLE 0.42–0.47, AME–AME 0.21–0.32, AME–ALE 0.03–0.10, PME–PME 0.27–0.42, PME–PLE 0.37–0.53, AME–PME 0.58–0.83, ALE–PLE 0.42–0.67, clypeus height at AME 1.03–1.53, clypeus height at ALE 1.00–1.32.

Cheliceral furrow with three promarginal and four retromarginal teeth.

Measurements of palp and legs. Leg formula: 1423. Palp: 7.2–11.4 [2.5–3.9, 1.0–1.7, 1.3–2.1, 2.4–3.7]; Legs: I 33.8–54.4 [9.0–14.9, 2.6–4.1, 9.3–15.2, 8.6–14.0, 4.3–6.2], II 29.9–44.1 [8.3–12.5, 2.4–3.8, 8.1–11.8, 7.4–11.0, 3.7–5.0], III 21.2–32.2 [6.2–9.8, 1.9–3.0, 5.2–7.7, 5.2–7.9, 2.7–3.8], IV 29.9–46.3 [8.4–13.3, 2.1–3.3, 7.8–12.1, 7.8–11.9, 3.8–5.7]. Thus, legs in females, in relation to other Psechrus species , short: FEM-I+MTT-I/CL: 2.6–2.9.

Palpal claw with 13–16 teeth.

Spination. Palp: 131, 110, 1101, 1014; legs: femur I 566, II 566 (556,555), III–IV 555; patella I–IV 000; tibia I–II 3038, III 3036 (3035,3034), IV 3036; metatarsus I–III 3035, IV 3035 (3036).

Copulatory organ (see also diagnosis and general description of himalayanus -group). Median septum almost as long as broad ( Fig. 44a View FIGURES 44 ). Slit sense organs and epigynal muscle sigilla outside epigynal field.

Primordial copulatory organ. Pre-epigyne: Pre-septum broader than long, with distal margins of pre-LL pointing posteriorly ( Fig. 44e View FIGURES 44 ). Fine, transversal edges below pre-CO recognisable ( Fig. 44e View FIGURES 44 ).

Pre-vulva: Pre-vulva similar to P. marsyandi . Distinguished by the longer pre-CD and the smaller pre-SH (in relation to pre-receptaculum) ( Fig. 44d View FIGURES 44 ).

Colouration of male and female (see also description for himalayanus -group and Psechrus ). Median bands on carapace serrated. Rarely with narrow, dark extensions connecting them with the lateral bands. Lateral bands narrow to medium sized (ca. 1–1.2 diameter of PME) and serrated. Light longitudinal line ventrally on opisthosoma may be continuous, broken subdistally or constricted subdistally and medium- sized. If measured centrally on opisthosoma, its width is less than the width of one half of the cribellum (ca. 0.5–0.7 of one half of the cribellum).

Variation of copulatory organs. Males: Without significant variation. Females: Anterio-lateral curves of distal margins of LL may be larger and extending further laterally ( Fig. 45a View FIGURES 45 , 88m View FIGURES 88 ). Main sections of margins of LL may be approximately straight (not illustrated). Vulva with less variation: Position and length of SH may differ slightly ( Figs 44b View FIGURES 44 , 45b View FIGURES 45 , 91m View FIGURES 91 ) and margins of initial parts of CD may be less clearly visible ( Fig. 45b View FIGURES 45 ). Transition zone between CD and spermatheca may differ in shape ( Figs 44b View FIGURES 44 , 45b View FIGURES 45 , 91m View FIGURES 91 ).

Distribution. Laos ( Fig. 98 View FIGURE 98 ).

SMF

Forschungsinstitut und Natur-Museum Senckenberg

MHNG

Museum d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Psechridae

Genus

Psechrus

Loc

Psechrus luangprabang Jäger, 2007

Bayer, Steffen 2012
2012
Loc

Psechrus luangprabang Jäger 2007: 45

Bayer, S. & Jager, P. 2010: 72
Jager, P. 2007: 45
2007