Psechrus taiwanensis Wang & Yin, 2001

Bayer, Steffen, 2012, The lace-sheet-weavers — a long story (Araneae: Psechridae: Psechrus), Zootaxa 3379 (1), pp. 1-170 : 118-119

publication ID	https://doi.org/ 10.11646/zootaxa.3379.1.1
persistent identifier	https://treatment.plazi.org/id/D0272654-FFF5-5835-FF20-2D11FDF2418B
treatment provided by	Felipe
scientific name	Psechrus taiwanensis Wang & Yin, 2001
status

Treatment

Psechrus taiwanensis Wang & Yin, 2001 View in CoL

Figs 65a–c View FIGURES 65 , 89j View FIGURES 89 , 92j View FIGURES 92

Psechrus taiwanensis Wang and Yin 2001: 340 View in CoL , figs 29–30 (Description of ♀, illustration of ♀). [Holotype ♀ (SB 238) from TAIWAN (‘Formosa’); A.P. Holst leg. 1893–1894; NHM 1894•7•11•2, examined]. Ono 2009: 140, figs 2.2.24.1–3 (Non description & illustration of ♀, misidentified, see P. clavis View in CoL sp. nov.). Yoshida 2009: 7, figs 1–7 (Non description & illustration of ♂ and ♀, misidentified, see P.clavis View in CoL sp. nov.).

Note on holotype: In an ornithological publication La Touche (1895) stated that A.P. Holst —also an ornithologist— stayed mainly in the Southern part of Formosa (Taiwan) and about ten days in Kamana. This was a former station of English missionaries, presently Cishan in Tainan county. Possibly he had collected the female Psechrus View in CoL specimen there.

Psechrus torvus View in CoL — Lee 1966: 18, figs 3e–g (Description of ♂ and ♀, illustration of ♂ and ♀, misidentified). Hu 1984: 57, figs 51.1–3 (Description of ♂ and ♀, illustration of ♂ and ♀ after Lee 1966, misidentified).

Psechrus sinensis View in CoL — Levi 1982: 123, figs 34–39, ad part, figs 36–39 misidentified (Description of ♀, figs 38–39: illustration of ♀).

Revised diagnosis (see also diagnosis for sinensis -group above). Female very similar to P. kenting in having a relatively broad median septum (MS) (slightly broader than long) ( Fig. 65a View FIGURES 65 ), narrow and curved initial sections of copulatory ducts (CD) and the bulbous sections of CD in contact with the receptacula ( Fig. 65b View FIGURES 65 ). Distinguished by the posteriorly broader MS ( Fig. 65a View FIGURES 65 ), the slightly longer bulbous sections of CD exhibiting a small bulge anteriorly and the spermathecal heads with longer stalks. Additionally, in P. taiwanensis receptacula partly covered by CD ( Fig. 65b View FIGURES 65 ).

Description. Male: unknown.

Female:

Body and eye measurements. Carapace length 9.6, carapace width 6.6, anterior width of carapace 3.9, opisthosoma length 12.5, opisthosoma width 6.1. Eyes: AME 0.48, ALE 0.51, PME 0.50, PLE 0.51, AME–AME 0.27, AME–ALE 0.08, PME–PME 0.35, PME–PLE 0.45, AME–PME 0.69, ALE–PLE 0.53, clypeus height at AME 1.37, clypeus height at ALE 1.30.

Cheliceral furrow with three promarginal and four retromarginal teeth.

Measurements of palp and legs. Leg formula: 1243. Palp: 11.0 [3.9, 1.6, 2.0, 3.5]; Legs: I 52.8 [13.9, 4.1, 14.6, 14.1, 6.1], II 42.2 [12.3, 3.7, 11.0, 10.7, 4.9], III 29.8 [9.1, 2.8, 6.9, 7.5, 3.5], IV 41.0 [12.1, 3.2, 10.2, 10.5, 5.0].

Palpal claw with 16 teeth.

Spination. Palp: 141, 110, 1101, 1014; legs: femur I 646, II 546, III 545, IV 544; patella I–IV 000; tibia I–II 3038, III 3036, IV 3037{30310}; metatarsus I–III 3035, IV 3037.

Copulatory organ (see also diagnosis and general description of sinensis -group). Epigynal muscle sigilla and slit sense organs outside epigynal field (EF), but close by ( Fig. 65a View FIGURES 65 ). As well as in P. kenting receptacula clearly smaller than bulbous sections of CD ( Fig. 65b View FIGURES 65 ).

Colouration of female (see also description for sinensis -group and Psechrus ). Median bands on carapace not serrated. Lateral bands very narrow (ca. 0.3 diameter of PME). Light longitudinal line ventrally on opisthosoma broken subdistally and medium-sized to broad. If measured centrally on opisthosoma, its width is ca. 0.7 the width of one half of the cribellum. Distal patch broader than main section.

Remarks: Lee (1966) reported P. torvus from Taiwan. According to his illustrations ( Lee 1966, figs 3e–g) the specimens he had examined were definitely not P. torvus and might be P. taiwanensis . Unfortunately, there is no statement about deposition of the respective material. Since his illustrations are not really informative (too small, details of embolus and conductor of bulb not recognisable, vulva not illustrated) it cannot be clarified if he examined P. taiwanensis . According to his illustration of the epigyne (fig. 3.f) it is at least more likely that it was P. taiwanensis than P. clavis sp. nov. or P. kenting . The two latter species are also distributed throughout Taiwan.

Distribution. Taiwan ( Fig. 97 View FIGURE 97 ).

Kingdom	Animalia
Phylum	Arthropoda
Class	Arachnida
Order	Araneae
Family	Psechridae
Genus	Psechrus