Psechrus fuscai Bayer 2012, sp. nov.
Creators: name: Bayer, Steffen
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Psechridae
Psechrus
Psechrus fuscai

description: Psechrus fuscai sp. nov.
Figs 59a–c, 82d, 89e, 92e
Type material. Holotype ♀ (SB 954), CHINA: Yunnan Province: Gongshan Co., Bingzhongluo Township, trail between Niwaluo and Fuscai, N 28°01'24'', E 98°32'59'', 2345 m; J.A. Miller leg. 16.VIII.2006; field no. JM 06081601, | GLGS06-006 |; CAS 9032230.
Etymology. The specific name refers to the type locality; term (name of village) in apposition.
Diagnosis (see also diagnosis for sinensis -group above). Female similar to P. tingpingensis in having median septum (MS), not longer than broad (Fig. 59a) but minimally broader than long, and twisted copulatory ducts (CD) with their initial sections running more or less transversally medially (Fig. 59b). Distinguished by the sack-like MS, the peculiar, flattened, glossy fields in the areas of copulatory openings (CO) (Fig. 59a, 89e) and the clearly broader distal sections (in comparison with the proximal sections) of copulatory ducts (CD) (Fig. 59b).
Description. Male: unknown.
Female:
Body and eye measurements. Carapace length 10.0, carapace width 6.9, anterior width of carapace 4.3, opisthosoma length 12.5, opisthosoma width 6.6. Eyes: AME 0.46, ALE 0.51, PME 0.51, PLE 0.51, AME–AME 0.29, AME–ALE 0.09, PME–PME 0.42, PME–PLE 0.50, AME–PME 0.83, ALE–PLE 0.70, clypeus height at AME 1.22, clypeus height at ALE 1.18.
Cheliceral furrow with three promarginal and four retromarginal teeth.
Measurements of palp and legs. Leg formula: 1243. Palp: 12.5 [4.3, 1.8, 2.2, 4.2]; Legs: I 56.9 [16.3, 4.2, 15.5, 14.7, 6.2], II 45.6 [13.2, 3.8, 12.3, 11.4, 4.9], III 32.6 [9.9, 3.0, 8.1, 7.9, 3.7], IV 43.8 [12.7, 3.4, 11.5, 11.4, 4.8].
Palpal claw with 14 teeth.
Spination. Palp: 131, 110, 1101, 1014; legs: femur I– II 516, III 435, IV 434; patella I–IV 000; tibia I 3036, II 3036 {3035} III 2034, IV 2035; metatarsus I– IV 3035.
Copulatory organ (see also diagnosis and general description of sinensis -group). Slit sense organs and epigynal muscle sigilla outside epigynal field (Fig. 59a). Spermathecal heads upon short stalks. Entire vulva irregularly shaped, right CD distinctly larger than left one (Fig. 59b).
Colouration (see also description for sinensis -group and Psechrus). Median bands on carapace hardly serrated (Fig. 82d). Lateral bands very narrow (at most 0.3 diameter of PME) and —if at all— slightly serrated (Fig. 82d). Light longitudinal line ventrally on opisthosoma constricted subdistally and medium sized to broad. If measured centrally on opisthosoma, its width is ca. 0.7 of one half of the cribellum. Distal part of longitudinal line slightly broader than main section.
Remarks: At present it cannot be clarified if the irregular shape of the vulva is a species-specific character or if it should be regarded as malformation of this particular female. The latter seems more likely because in all other Psechrus species, the female copulatory organ is bilaterally symmetrical.
Distribution. China (Fig. 96).
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 109-110, DOI: 10.11646/zootaxa.3379.1.1, http://zenodo.org/record/6039832