Psechrus norops, Bayer, 2012

Bayer, Steffen, 2012, The lace-sheet-weavers — a long story (Araneae: Psechridae: Psechrus), Zootaxa 3379 (1), pp. 1-170 : 44-45

Psechrus norops sp. nov.

Figs 19a–c , 87j , 90j

Type material: Holotype ♀ ( SB 860 ), MALAYSIA: Pahang Province: Fraser’s Hill , ca. N 03°42'30'', E 101°44'30'', ca. 1200 m; Coll. Rae Sherriffs; Tilg. 27-9-1962; ZMUC 5730 .

Etymology. The specific name refers to the bright receptacula seminis in the holotype female (Ancient Greek “norops” means “bright, flashing, gleaming”); term (adjective) in apposition.

Diagnosis (see also diagnosis for singaporensis -group above). Females similar to P. singaporensis in having a rather simple median septum (MS) and medium sized copulatory ducts (CD). Distinguished by the spermathecal heads (SH) arising upon spermatheca and the narrower copulatory ducts (CD) ( Fig. 19b ).

Description. Male: unknown.

Female:

Body and eye measurements. Carapace length 5.5, carapace width 3.8, anterior width of carapace 2.4, opisthosoma length 7.8, opisthosoma width 3.1. Eyes: AME 0.34, ALE 0.37, PME 0.39, PLE 0.37, AME–AME

0.19, AME–ALE 0.08, PME–PME 0.27, PME–PLE 0.35, AME–PME 0.52, ALE–PLE 0.43, clypeus height at AME 0.69, clypeus height at ALE 0.58.

Cheliceral furrow with three promarginal and four retromarginal teeth.

Measurements of palp and legs. Leg formula: 1423. Palp: 6.6 [2.2, 0.9, 1.2, 2.3]; Legs: I 37.3 [10.0, 2.3, 10.4, 9.3, 5.3], II 28.0 [8.0, 2.0, 7.4, 6.8, 3.8], III 20.3 [5.9, 1.4, 5.0, 4.8, 2.7], IV 30.3 [8.6, 1.8, 7.8, 7.6, 4.5].

Palpal claw with 14 teeth.

Spination. Palp: 131, 110, 1101, 1014; legs: femur I 656, II 655, III–IV 555; patella I–IV 000; tibia I–II 3038, III–IV 3136; metatarsus I–IV 3035.

Copulatory organ (see also diagnosis and general description of singaporensis -group). MS more or less rectangular. Copulatory openings small and narrow ( Fig. 19a ). Slit sense organs and epigynal muscle sigilla outside epigynal field, but close by. CD with ca. 1/3 winding until reaching receptaculum ( Fig. 19b ).

Colouration (see also description for singaporensis -group and Psechrus ). Median bands on carapace at most slightly serrated. Width of lateral bands ca. 1.2x diameter of PME and at most slightly serrated.

Distribution. Malaysia ( Fig. 99 ).

Figures

FIGURES 19a–c. Psechrus norops sp. nov., ♀ holotype SB 860 from Malaysia, Pahang Prov. a Epigyne, ventral view. b Vulva, dorsal view. c Schematic course of internal duct system.

FIGURES 87a–k. Psechrus spp., photos of epigyne, ventral view. a P. argentatus. b P. libelti. c P. mulu. d P. borneo. e P. annulatus. f P. aluco sp. nov. g P. decollatus sp. nov. h P. singaporensis. i P. elachys sp. nov. j P.norops sp. nov. k P. arcuatus sp. nov. a ♀ SB 608 from Indonesia, Maluku Prov. b ♀ SB 969 from Brunei Darussalam. c ♀ paratype SB 239 from Malaysia, Borneo, Sarawak Prov. d ♀ holotype SB 279 from Indonesia, Kalimantan Timur Prov. e ♀ lectotype SB 829 from Indonesia, Jawa Tengah Prov. f ♀ holotype SB 123 from Indonesia, Jawa Barat Prov. g ♀ holotype SB 501 from Indonesia, Jawa Timur Prov. h ♀ SB 864 from Malaysia, Selangor Prov. i ♀ holotype SB 861 from Thailand, Satun Prov. j ♀ holotype SB 860 from Malaysia, Pahang Prov. k ♀ holotype SB 333 from Indonesia, Sumatera Barat Prov.

FIGURES 90a–k. Psechrus spp., photos of vulva, dorsal view. a P. argentatus. b P. libelti. c P. mulu. d P. borneo. e P. annulatus. f P. aluco sp. nov. g P. decollatus sp. nov. h P. singaporensis. i P. elachys sp. nov. j P.norops sp. nov. k P. arcuatus sp. nov. a ♀ SB 551 from Papua New Guinea, Morobe Prov. b ♀ SB 87 from Indonesia, Sumatra, Mentawei Islds. c ♀ SB 253 from Malaysia, Borneo, Sarawak Prov. d ♀ holotype SB 279 from Indonesia, Kalimantan Timur Prov. e ♀ lectotype SB 829 from Indonesia, Jawa Tengah Prov. f ♀ holotype SB 123 from Indonesia, Jawa Barat Prov. g ♀ holotype SB 501 from Indonesia, Jawa Timur Prov. h ♀ SB 220 from Singapore. i ♀ holotype SB 861 from Thailand, Satun Prov. j ♀ holotype SB 860 from Malaysia, Pahang Prov. k ♀ holotype SB 333 from Indonesia, Sumatera Barat Prov.

FIGURE 99. Distribution of Psechrus in western Malaysia and Sumatra. Symbols: species belonging to the singaporensis- group. Arrow: Distribution of P. libelti (argentatus-group).