Psechrus cebu Murphy, 1986

Bayer, Steffen, 2012, The lace-sheet-weavers — a long story (Araneae: Psechridae: Psechrus), Zootaxa 3379 (1), pp. 1-170 : 143-144

publication ID	https://doi.org/ 10.11646/zootaxa.3379.1.1
DOI	https://doi.org/10.5281/zenodo.6303194
persistent identifier	https://treatment.plazi.org/id/D0272654-FF0E-58CC-FF20-29DFFDB840D4
treatment provided by	Felipe
scientific name	Psechrus cebu Murphy, 1986
status

Treatment

Psechrus cebu Murphy, 1986 View in CoL

Figs 79a–d View FIGURES 79 , 80a–f View FIGURES 80 , 86l View FIGURES 86 , 89l View FIGURES 89 , 92l View FIGURES 92

Psechrus cebu Murphy 1986: 66 View in CoL , figs 3–6 (Description of ♂ and ♀, illustration of ♂ and ♀). [Holotype ♂ ( SB 149 ) from PHILIPPINES: Cebu: Cebu Province: White Cave , camp 7; Fr. Schoenig (accompanied by Tumilap + company) leg. 17.I.1984; MCZ; Paratypes: 2 ♀♀ ( SB 150 [epigyne dissected and lost], 151), with same data as for holotype; MCZ; 1 ♀ ( SB 177 ), PHILIPPINES: Cebu: Cebu Province: near Cebu City, Cave 7, camp 7, cave, near entrance; G. Alberti leg. III.1983; MCZ, all type material examined].

Additional material examined. PHILIPPINES: Cebu: Cebu Province: White Cave , camp 7; Fr. Schoenig (accompanied by Tumilap + company) leg. 17.I.1984; 1 s.a. ♀ ( SB 152 ), MCZ .

Revised diagnosis. Males with margins of tegulum (T) continuously converging from proximal to distal section. Embolus (E) dorsally with characteristic, small, pointed apophysis ( Figs 79a–c View FIGURES 79 ). Conductor (C) membranous, simple and in prolateral view S-shaped and wound around E ( Figs 79a,c View FIGURES 79 ). Females with trapezoid median septum (MS). Anterior margins of lateral lobes strongly diverging ( Figs 80a,f View FIGURES 80 , 89l View FIGURES 89 ). Copulatory ducts (CD) short, broad and with distinctly rough surface ( Figs 80b View FIGURES 80 , 92l View FIGURES 92 ).

Description. Male:

Body and eye measurements. Carapace length 6.3, carapace width 4.3, anterior width of carapace 2.4, opisthosoma length 9.0, opisthosoma width 2.8. Eyes: AME 0.35, ALE 0.40, PME 0.45, PLE 0.40, AME–AME 0.23, AME–ALE 0.06, PME–PME 0.27, PME–PLE 0.36, AME–PME 0.47, ALE–PLE 0.46, clypeus height at AME 0.74, clypeus height at ALE 0.64.

Cheliceral furrow with three promarginal and four retromarginal teeth.

Measurements of palp and legs. Leg formula: 1423. Palp: 7.5 [2.7, 1.2, 1.2, 2.4]; Legs: I 73.4 [20.0, 3.0, 19.8, 21.9, 8.7], II 52.3 [14.7, 2.5, 12.6, 16.4, 7.1], III 36.0 [10.6, 2.0, 8.6, 10.2, 4.6], IV 57.4 [15.5, 2.4, 14.0, 17.7, 7.8]. Spination. Palp: 141, 010, 0100; legs: femur I 657{656}, II 656, III 646, IV 756{646}; patella I–IV 000; tibia I–II 3038, III 3138, IV 3235{3138}; metatarsus I–III 3036, IV 3035.

Palpal femur modified with ventral bulge ( Fig. 79d View FIGURES 79 ). MC-I–II & MT-I absent.

Copulatory organ. Embolus- (E) length and width medium-sized, conductor (C) thin, rounded apically ( Fig. 79b View FIGURES 79 ). Sperm duct U-shaped ( Fig. 79b View FIGURES 79 ). Cymbium dorsally with very dense scopula, covering 1/2 of cymbium. Palpal tibia medium-sized and broadest distally ( Figs 79a–c View FIGURES 79 ).

Female:

Body and eye measurements. Carapace length 6.1–7.1, carapace width 4.2–4.6, anterior width of carapace 2.7–3.0, opisthosoma length 10.0–10.8, opisthosoma width 3.4–3.8. Eyes: AME 0.37–0.43, ALE 0.44–0.48, PME 0.46–0.47, PLE 0.46–0.48, AME–AME 0.21–0.24, AME–ALE 0.06–0.08, PME–PME 0.23–0.28, PME–PLE 0.34–0.39, AME–PME 0.47–0.52, ALE–PLE 0.42–0.46, clypeus height at AME 0.84–0.93, clypeus height at ALE 0.64–0.78.

Cheliceral furrow with three promarginal and four retromarginal teeth.

Measurements of palp and legs. Leg formula: 1423. Palp: 7.8–8.6 [2.7–3.0, 1.1–1.2, 1.5–1.6, 2.5–2.8]; Legs: I 50.0–55.7 [14.2–15.6, 2.6–3.1, 13.8–15.4, 13.5–15.1, 5.9–6.5], II 37.6–42.4 [10.8–12.2, 2.3–2.7, 9.9–11.2, 10.1–11.3, 4.5–5.0], III 25.6–28.8 [7.9–8.9, 1.8–2.1, 6.1–6.9, 6.6–7.4, 3.2–3.5], IV 39.5–44.4 [11.4–12.8, 2.2–2.5, 10.2–11.5, 10.6–12.0, 5.1–5.6]. Thus, legs in females, in relation to other Psechrus species , rather long: FEM- I+MTT-I/CL: ca. 4.5.

Palpal claw with 13–14 teeth.

Spination. Palp: 131, 110, 1101, 1014 (1015); legs: femur I 667 (766), II 666 (656,667,665), III 656 (646,666), IV 655 (545,665); patella I–IV 000; tibia I 3036 (3038), II 3038 (3038), III 3136 (313,3135), IV 3137 (3137,3138); metatarsus I–II 3037, III 3035 (3035,3036), IV 3034.

Copulatory organ. Epigynal field (EF) relatively high ( Fig. 80a View FIGURES 80 ). Epigynal muscle sigilla and slit sense organs outside EF. Spermathecal heads relatively small, arising anterio-medial on receptacula ( Fig. 80b View FIGURES 80 ).

Primordial copulatory organ. Pre-epigyne: Pre-septum broader than long, the distal endings of its lateral margins as well as the ones of the lateral lobes just slightly extending medially. Pre-copulatory openings broad ( Fig. 80d View FIGURES 80 ). Pre-EF absent.

Pre-vulva: Pre-CD broader than pre-receptacula ( Fig. 80e View FIGURES 80 ).

Colouration of male and female (see also description for Psechrus ). Sternum light yellowish brown at lateral margins and with brown, tapered patch centrally. Median bands on carapace serrated. Lateral bands (very) broad (1.5–2.5x diameter of PME) and serrated. Light longitudinal line ventrally on opisthosoma continuous and rather narrow. If measured centrally on opisthosoma, its width is 0.3–0.5 times the width of one half of the cribellum.

Variation of copulatory organs. Females: In one specimen posterior margin of MS slightly concave ( Fig. 80f View FIGURES 80 ). Vulvae without significant variation.

Distribution. Philippines ( Fig. 102 View FIGURE 102 ).