Panjange pueh Huber

Bernhard A. Huber & Charles Leh Moi Ung, 2016, The Panjange nigrifrons group in Borneo (Araneae: Pholcidae): high diversity in Sarawak, apparent absence in Sabah, European Journal of Taxonomy 184 (184), pp. 1-32 : 6-11

Panjange pueh Huber , sp. nov.

urn:lsid:zoobank.org:act:792671DD-F7D9-4497-BD2B-84E925032C4C

Figs 2 , 8–9 , 16–28 , 52–54

Panjange Bor 96: Huber & Nuñeza 2015: 5, 43–44.

Diagnosis

Distinguished from similar species (with pair of pointed processes arising from near PME and ventral apophysis on male palpal femur: Pa. bako ; Pa. kapit sp. nov.; Pa. niah sp. nov.; Pa. sedgwicki ; Pa. tahai comb. nov.) by details of male pedipalp ( Figs 16–17 ; simple conical ventral femur apophysis; distinctive prolateral membranous process on procursus; shape of procursus tip; short appendix, similar only in Pa. niah sp. nov.); from Pa. kapit sp. nov. also by shorter palpal segments and shorter epigynal scape ( Figs 17, 19 ). Females are difficult to distinguish from Pa. bako and Pa. niah sp. nov. (internal transversal folds much more complex in Pa. bako , very similar in Pa. niah sp. nov.; unknown in Pa. sedgwicki ).

Etymology

Named for the type locality; noun in apposition.

Type material

MALAYSIA-BORNEO: holotype, Ƌ, Sarawak, Pueh foothills, forest along river (1.798– 1.800 ° N, 109.708– 109.718° E), 100–200 m a.s.l., 16 Jul. 2014 (B.A. Huber, S.B. Huber), ZFMK ( Ar 14575 ) .

Other material examined

MALAYSIA-BORNEO, Sarawak: 3 ƋƋ, 5 ♀♀, same data as holotype, ZFMK ( Ar 14576-77 ) ; 1 ♀, 3 juvs, in absolute ethanol, same data, ZFMK ( Bor 231 ) .

Description

Male (holotype)

MEASUREMENTS. Total body length 5.0, carapace width 1.1. Leg 1: 44.3 (9.9 + 0.5 + 10.2 + 21.1 + 2.6), tibia 2: 6.3, tibia 3: 3.5, tibia 4: 5.8; tibia 1 L/d: 106. Distance PME–PME 490 µm, diameter PME 105 µm, distance PME–ALE ~45 µm; AME absent.

COLOR. Carapace pale ochre yellow to whitish, posterior mark ( Fig. 8 ) lost in ethanol, ocular area and clypeus dark brown (black in life); sternum whitish; legs ochre-orange with dark brown patellae and tibia-metatarsus joints; abdomen ochre-gray, with black marks dorsally, monochromous ventrally.

BODY. Habitus as in Fig. 8 ; ocular area raised, each triad on long stalk, with pointed straight process arising from near PME ( Figs 2 , 18 ); carapace without median furrow; clypeus unmodified; sternum wider than long (0.7/0.6), unmodified. Gonopore with four epiandrous spigots ( Fig. 27 ). ALS as in Fig. 28 .

CHELICERAE. Similar to close relatives, with proximal pair of processes and with distinctively bipartite distal apophyses ( Fig. 18 ); without modified hairs; without stridulatory ridges.

PALPS. As in Figs 16–17 ; coxa unmodified; trochanter with slightly curved retrolatero-ventral apophysis and low retrolateral hump; femur with conical ventral process; procursus with row of about 26 ventral ridges ( Fig. 26 ), with distinctive prolateral membranous process and distal elements ( Figs 21–23 ); bulb with strong proximal sclerite, short curved appendix, and proximally widened and sclerotized embolus with distal processes and fringes ( Figs 24–26 ).

LEGS. Without spines and curved hairs; few vertical hairs; retrolateral trichobothrium on tibia 1 at 1.5%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 with> 40 indistinct pseudosegments.

Variation

Tibia 1 in 3 other males: 8.9, 9.3, 9.6.

Female

In general similar to male but eye triads on low humps, much closer together (distance PME–PME 235 µm), without pointed processes. Tibia 1 in 5 females: 7.6–8.3 (mean 7.9). Epigynum weakly sclerotized plate with large weakly sclerotized posterior ‘knob’ ( Figs 19 , 52 ), internal arch and transversal folds visible through cuticle; internal genitalia as in Figs 20 , 53–54 .

Distribution

Known from type locality in Sarawak only ( Fig. 1 ).

Figures

Fig. 1. Known distribution of the Panjange nigrifrons group.

Figs 2 – 7. Male prosomata, oblique frontal views. 2. Panjange pueh Huber, sp. nov. (ZFMK Ar 14576). 3. Pa. niah Huber, sp. nov. (ZFMK Ar 14579). 4. Pa. kapit Huber, sp. nov. (ZFMK Ar 14583). 5. Pa. nigrifrons Deeleman-Reinhold & Deeleman, 1983 (RMNH, Sepaku). 6. Pa. kubah Huber, sp. nov. (ZFMK Ar 14587). 7. Pa. seowi Huber, sp. nov. (ZFMK Ar 14590).

Figs 8 – 15. Live specimens. 8 – 9. Panjange pueh Huber, sp. nov., Ƌ and ♀ from Pueh. 10 – 14. Pa. kapit Huber, sp. nov. from Kapit. 10 – 11. Adult Ƌ, 12. Penultimate instar Ƌ, 13 – 14. ♀ with egg-sac. 15. Pa. niah Huber, sp. nov., ♀ with egg-sac from Niah.

Figs 16 – 20. Panjange pueh Huber, sp. nov. (ZFMK Ar 14576 – 77). 16 – 17. Left male palp, prolateral and retrolateral views. 18. Male ocular area, clypeus, and chelicerae, oblique frontal view (arrow points at distal cheliceral apophysis). 19 – 20. Cleared female genitalia, ventral and dorsal views. Abbreviations: a = appendix; b = genital bulb; e = embolus; f = femur; p = procursus; ps = proximal bulbal sclerite; tr = trochanter. Scale lines: 0.5 mm.

Figs 21 – 28. Panjange pueh Huber, sp. nov. (ZFMK Ar 14576). 21. Left procursus and bulb, prolateral view. 22. Left procursus, prolateral distal view (arrow points to distinctive process in distal pit). 23. Prolateral membranous process on left procursus. 24 – 25. Tip of embolus, distal views. 26. Left procursus and bulb, prolatero-distal view. 27. Male gonopore. 28. Male ALS. Abbreviations: a = appendix; b = genital bulb; e = embolus; p = procursus. Scale lines: 20 µm (28); 30 µm (25, 27); 40 µm (23); 60 µm (22, 24); 100 µm (26); 200 µm (21).

Figs 52 – 60. Female genitalia, untreated in ventral view, cleared in ventral and dorsal views. 52 – 54. Panjange pueh Huber, sp. nov. (ZFMK Ar 14577). 55 – 57. Pa. niah Huber, sp. nov. (ZFMK Ar 14580). 58 – 60. Pa. kapit Huber, sp. nov. (ZFMK Ar 14584).