Psechrus cebu Murphy 1986
Creators: name: Bayer, Steffen
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Psechridae
Psechrus
Psechrus cebu

description: Psechrus cebu Murphy, 1986
Figs 79a–d, 80a–f, 86l, 89l, 92l
Psechrus cebu Murphy 1986: 66, 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). Conductor (C) membranous, simple and in prolateral view S-shaped and wound around E (Figs 79a,c). Females with trapezoid median septum (MS). Anterior margins of lateral lobes strongly diverging (Figs 80a,f, 89l). Copulatory ducts (CD) short, broad and with distinctly rough surface (Figs 80b, 92l).
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). MC-I–II & MT-I absent.
Copulatory organ. Embolus- (E) length and width medium-sized, conductor (C) thin, rounded apically (Fig. 79b). Sperm duct U-shaped (Fig. 79b). Cymbium dorsally with very dense scopula, covering 1/2 of cymbium. Palpal tibia medium-sized and broadest distally (Figs 79a–c).
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). Epigynal muscle sigilla and slit sense organs outside EF. Spermathecal heads relatively small, arising anterio-medial on receptacula (Fig. 80b).
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). Pre-EF absent.
Pre-vulva: Pre-CD broader than pre-receptacula (Fig. 80e).
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). Vulvae without significant variation.
Distribution. Philippines (Fig. 102).
description: Published as part of Bayer, Steffen, 2012, The lace-sheet-weavers — a long story (Araneae: Psechridae: Psechrus), pp. 1-170 in Zootaxa 3379 (1) on pages 143-144, DOI: 10.11646/zootaxa.3379.1.1, http://zenodo.org/record/6039832