Psechrus hartmanni, Bayer, 2012

Bayer, Steffen, 2012, The lace-sheet-weavers — a long story (Araneae: Psechridae: Psechrus), Zootaxa 3379 (1), pp. 1-170 : 129-132

publication ID	https://doi.org/ 10.11646/zootaxa.3379.1.1
DOI	https://doi.org/10.5281/zenodo.6303183
persistent identifier	https://treatment.plazi.org/id/D0272654-FF00-58C0-FF20-29F9FD9E46FE
treatment provided by	Felipe
scientific name	Psechrus hartmanni
status	sp. nov.

Treatment

Psechrus hartmanni View in CoL sp. nov.

Figs 71a–e View FIGURES 71 , 72a–d View FIGURES 72 , 81b View FIGURES 81 , 82j,p View FIGURES 82 , 83f View FIGURES 83 , 86h View FIGURES 86 , 89n View FIGURES 89 , 92n View FIGURES 92

Psechrus torvus View in CoL — 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 GoogleMaps ; 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 GoogleMaps .

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 ) GoogleMaps , 1 juv. ( SB 875 ) GoogleMaps , SMF 34496 GoogleMaps .

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 View FIGURES 72 ) and tip of harpago (H) pointing ventrally ( Figs 72a,c View FIGURES 72 ). H dorsally with three ridges and shorter than in P. torvus . Females with branches of tegimentum (TM) pointing anterio-laterally ( Fig. 71a View FIGURES 71 ). First loop of copulatory duct (CD) directed laterad, larger than second loop ( Fig. 71b View FIGURES 71 ). 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 View FIGURES 72 ). MC-I present in form of two large apical ones ( Fig. 82p View FIGURES 82 ; 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 View FIGURES 72 ). Sperm duct diagonal U-shaped ( Fig. 72b View FIGURES 72 ). Cymbium dorsally with very dense scopula, covering 6/7 of cymbium ( Fig. 83f View FIGURES 83 ). Palpal tibia medium sized to long ( Figs 72a–c View FIGURES 72 ), its distal retrolateral bulge corner-shaped ( Fig. 72b View FIGURES 72 ).

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 View FIGURES 71 , 89n View FIGURES 89 ). Copulatory ducts distinctly larger than receptacula. Spermathecal heads arising anterio-medial on receptacula ( Fig. 71b View FIGURES 71 ).

Colouration of male and female (see also description for torvus -group and Psechrus ). Sternum unicoloured yellowish brown ( Fig. 82j View FIGURES 82 ). 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 View FIGURES 71 ) than generally. Spermathecal heads may differ slightly in direction ( Figs 71a, 71e View FIGURES 71 , 92n View FIGURES 92 ).

Distribution. Sri Lanka ( Fig. 94 View FIGURE 94 ).