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

description: Psechrus hartmanni sp. nov.
Figs 71a–e, 72a–d, 81b, 82j,p, 83f, 86h, 89n, 92n
Psechrus torvus — Simon 1892: 225, figs 173, 175 (Description & illustration of ♂, misidentified). Levi 1982: 122, figs 16–28, ad part, figs 23–28 misidentified (figs 23–24: illustration of ♀).
Type material. Holotype ♀ (SB 1007), SRI LANKA: Central Province: Pattipola, Horton Plains National Park, N 06°50'34.5'', E 80°48'51.3'', ca. 2100 m, moutainous rainforest, fern-rich road bank; V. Hartmann leg. 10.I.2011; SMF; Paratype ♀ (SB 845), SRI LANKA: Central Province: Nuwara Eliya, N 06°58'30'', E 80°47'30'', ca. 2000 m, tea plantation; G. Schmidt leg. XII.1981; SMF 34520.
Type material of Tegenaria torva. Paralectotype ♀ (SB 275, designated here), SRI LANKA (‘Ceylon’); J. Nietner leg. ca. 1855; OUMNH.
Additional material examined (6 ♀♀, 1 ♂, 1 p. s.a. ♀, 2 juvs). SRI LANKA (‘ Ceylan’); E. Simon leg. before 1892; Simon det. P. torvus; Simon-Coll. No. 499; 1 ♂ (SB 624), 2 ♀♀ (SB 628–629), MNHN AR170/1; 2 ♀♀ (SB 625–626), 1 juv. (SB 627), MNHN AR170/2; 2 ♀♀ (SB 630, 632), MNHN AR170/3. SRI LANKA: Central Province: Nuwara Eliya, N 06°58'30'', E 80°47'30'', ca. 2000 m, tea plantation; G. Schmidt leg. XII.1981; 1 p. s.a. ♂ (SB 874), 1 juv. (SB 875), SMF 34496.
Additional doubtful material examined. SRI LANKA, with no further details; G. Schmidt leg. XII.1981; 1 juv. (SB 844), SMF 34495.
Etymology. The specific name is a patronym in honour of the collector of the holotype, Volker Hartmann; noun (name) in genitive case.
Diagnosis (see also diagnosis for torvus -group above). In males embolus (E) with one helical winding (Fig. 72c) and tip of harpago (H) pointing ventrally (Figs 72a,c). H dorsally with three ridges and shorter than in P. torvus. Females with branches of tegimentum (TM) pointing anterio-laterally (Fig. 71a). First loop of copulatory duct (CD) directed laterad, larger than second loop (Fig. 71b). Distal section of CD located lateral to SH, not medial.
Description. Male:
Body and eye measurements. Carapace length 5.6, carapace width 4.2, anterior width of carapace 2.2, opisthosoma length 9.5, opisthosoma width 2.8. Eyes: AME 0.35, ALE 0.36, PME 0.37, PLE 0.36, AME–AME 0.18, AME–ALE 0.03, PME–PME 0.21, PME–PLE 0.29, AME–PME 0.46, ALE–PLE 0.42, clypeus height at AME 0.78, clypeus height at ALE 0.65.
Cheliceral furrow with three promarginal and four retromarginal teeth.
Measurements of palp and legs. Leg formula: 1423. Palp: 7.8 [3.0, 1.2, 1.3, 2.3]; Legs: I 59.9 [15.9, 2.9, 15.9, 17.5, 7.7], II 43.0 [12.0, 2.4, 10.7, 12.1, 5.8], III 28.3 [8.4, 2.0, 6.8, 7.4, 3.7], IV 48.2 [12.7, 2.3, 11.2, 14.9, 7.1].
Spination. Palp: 122, 000, 0000; legs: femur I 666, II 646, III 546, IV 656{645}; patella I–IV 000; tibia I 3038, II 3038{3138}, III 3134, IV 3136; metatarsus I–II 3037, III 3035, IV 3036.
Palpal femur ventrally modified with flat bulge (Fig. 72d). MC-I present in form of two large apical ones (Fig. 82p; Simon 1892: fig. 173), MT-I rather narrow, indistinct and as apical row. MC-II absent.
Copulatory organ (see also diagnosis and general description for torvus -group). Harpago arising at 1:00 o’ clock position on tegulum. Embolus base protruding retrolaterally (Fig. 72b). Sperm duct diagonal U-shaped (Fig. 72b). Cymbium dorsally with very dense scopula, covering 6/7 of cymbium (Fig. 83f). Palpal tibia medium sized to long (Figs 72a–c), its distal retrolateral bulge corner-shaped (Fig. 72b).
Female (Measurements of holotype first, those of other females as range in parentheses):
Body and eye measurements. Carapace length 6.9 (5.5–8.2), carapace width 4.6 (4.0–5.3), anterior width of carapace 3.2 (2.6–3.7), opisthosoma length 9.8 (7.1–10.5), opisthosoma width 7.4 (4.4–7.5). Eyes: AME 0.41 (0.32–0.42), ALE 0.44 (0.40–0.47), PME 0.47 (0.41–0.46), PLE 0.45 (0.41–0.46), AME–AME 0.27 (0.18–0.28), AME–ALE 0.06 (0.03–0.07), PME–PME 0.29 (0.20–0.27), PME–PLE 0.37 (0.30–0.38), AME–PME 0.57 (0.53–0.62), ALE–PLE 0.48 (0.41–0.52), clypeus height at AME 1.01 (0.78–1.22), clypeus height at ALE 0.93 (0.73–1.08).
Cheliceral furrow in holotype with three promarginal and four (left) and five (right) retromarginal teeth. Other females with three promarginal and four retromarginal, one with three promarginal and five retromarginal teeth.
Measurements of palp and legs. Leg formula: 1243 (holotype), 1423 (other females). Palp: 9.3 (7.9–11.2) [3.2 (2.7–4.0), 1.2 (1.1–1.6), 1.8 (1.6–2.1), 3.1 (2.5–3.5)]; Legs: I 38.6 (32.0–44.4) [10.2 (8.4–11.4), 2.6 (2.4–3.4), 10.9 (9.0–12.7), 10.0 (7.9–11.5), 4.9 (4.3–5.4)], II 31.5 (25.0–35.6) [8.7 (7.2–9.8), 2.4 (2.2–3.2), 8.5 (6.7–9.5), 7.6 (5.9–8.9), 3.7 (3.0–4.2)], III 21.0 (17.4–24.4) [6.2 (5.4–7.2), 1.9 (1.5–2.4), 5.1 (4.3–5.8), 5.1 (4.0–6.0), 2.7 (2.2–3.0)], IV 30.9 (25.3–35.5) [8.7 (7.2–9.8), 2.2 (1.8–2.7), 7.9 (6.3–8.9), 7.8 (6.3–9.3), 4.3 (3.7–4.8)].
Palpal claw with 14 (13–15) teeth.
Spination. Palp: 131 (131,152), 110 (110), 1101 (1101), 1014 (1014); legs (—except for patella— variable, only most common states noted): femur I 555 (546,556), II 556 (556,546) III 545 (545,556), IV 553 (544,543); patella I 000 (000), II 000{100} (000), III–IV 000 (000); tibia I 40210 (3038), II 3038 (3038), III 2124 (2124), IV 3137 (3138,3037,3025); metatarsus I 3037 (3037,3036), II 3037 (3037), III 3035 (3035), IV 3046 (3046,3035).
Copulatory organ (see also diagnosis and general description of torvus -group). Epigyne without (distinct) epigynal field (EF) (Fig. 71a,d, 89n). Copulatory ducts distinctly larger than receptacula. Spermathecal heads arising anterio-medial on receptacula (Fig. 71b).
Colouration of male and female (see also description for torvus -group and Psechrus). Sternum unicoloured yellowish brown (Fig. 82j). Median bands on carapace serrated. Lateral bands broad to very broad (2–3x diameter of PME) and serrated. Light longitudinal line ventrally on opisthosoma mostly continuous, may be broken subdistally and narrow. If measured centrally on opisthosoma, its width is 0.2–0.4 times the width of one half of the cribellum.
Variation of copulatory organs. Females: Branches of tegimentum (TM) may be narrower (Fig. 71d) than generally. Spermathecal heads may differ slightly in direction (Figs 71a, 71e, 92n).
Distribution. Sri Lanka (Fig. 94).
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 129-132, DOI: 10.11646/zootaxa.3379.1.1, http://zenodo.org/record/6039832