Psechrus borneo Levi, 1982

Bayer, Steffen, 2012, The lace-sheet-weavers — a long story (Araneae: Psechridae: Psechrus), Zootaxa 3379 (1), pp. 1-170 : 27-28

publication ID	https://doi.org/ 10.11646/zootaxa.3379.1.1
DOI	https://doi.org/10.5281/zenodo.5255906
persistent identifier	https://treatment.plazi.org/id/D0272654-FF9A-5858-FF20-2BE1FCC247FD
treatment provided by	Felipe
scientific name	Psechrus borneo Levi, 1982
status

Treatment

Psechrus borneo Levi, 1982 View in CoL

Figs 9a–c View FIGURES 9 , 87d View FIGURES 87 , 90d View FIGURES 90

Psechrus borneo Levi 1982: 126 View in CoL , figs 56–57 (Description and illustration of ♀). [Holotype ♀ ( SB 279 ) from INDONESIA: Borneo, Kalimantan Timur Province: Birang river (in the region of Berau GoogleMaps ), ca. N 12°11', E 117°28'; Dr. Erik Georg Mjöberg leg. 1920–1925; NRS; Paratype: 1 s.a. ♀ ( SB 280 ), INDONESIA: Borneo, Kalimantan Timur Province: Mt. Tibang GoogleMaps , 1300 m; Dr. E.G. Mjöberg leg. 1920–1925; NRS, all type material examined].

Revised diagnosis (see also diagnosis for mulu -group above). Females similar to P. mulu Levi, 1982 in diagnostic character states described for mulu -group (see above). Distinguished from the similar P. mulu by the lateral margins of median septum (MS) running steeper and by the copulatory openings (CO) more hidden, slit-like ( Fig. 9a View FIGURES 9 ) and not as close together as in mulu . CD of vulva curved and running into receptaculum from anterior ( Fig. 9b View FIGURES 9 ).

Description. Male: unknown.

Female:

Body and eye measurements. Carapace length 5.5, carapace width 3.8, anterior width of carapace 2.3, opisthosoma length 8.9, opisthosoma width 4.1. Eyes: AME 0.33, ALE 0.41, PME 0.38, PLE 0.38, AME–AME 0.18, AME–ALE 0.09, PME–PME 0.28, PME–PLE 0.31, AME–PME 0.43, ALE–PLE 0.38, clypeus height at AME 0.93, clypeus height at ALE 0.70.

Cheliceral furrow with three promarginal and four retromarginal teeth.

Measurements of palp and legs. Leg formula: 1423. Palp: 7.0 [2.3, 1.0, 1.3, 2.4]; Legs: I 48.3 [13.3, 2.3, 13.8, 12.7, 6.2], II 35.9 [10.3, 2.0, 9.7, 9.2, 4.7], III 24.9 [7.6, 1.6, 6.2, 6.3, 3.2], IV 37.9 [11.1, 1.9, 9.9, 9.7, 5.3].

Palpal claw with 15 teeth.

Spination. Palp: 131, 110, 1101, 1014; legs: femur I 666, II 656 III 556{655}, IV 555; patella I–IV 000; tibia I–II 3038, III 3134, IV 3136; metatarsus I–III 3035, IV 3034.

Copulatory organ (see also diagnosis and general description of mulu -group). MS posteriorly ca. 1.5x broader than anteriorly ( Fig. 9a View FIGURES 9 ). No statements about epigynal muscle sigilla and slit sense organs possible, because parts of epigynal field and surroundings were unfortunately cut along with dissection (presumably for the study in Levi 1982). Spermathecal heads (SH) without ‘stalks’, but relatively large in comparison to receptacula ( Fig. 9b View FIGURES 9 , 90d View FIGURES 90 ).

Colouration. See description for mulu -group and Psechrus .

Remark. It is uncertain, if the paratype (s.a. ♀, SB 280, not illustrated), indeed belongs to P. borneo . It may just as well belong to a different species. There is no further adult material from its recording locality, which is about 230 km away from the type locality.

Distribution. Indonesia [Eastern Borneo] ( Fig. 100 View FIGURE 100 ).