New and little known pholcid spiders (Araneae: Pholcidae) from Laos Author Yao, Zhiyuan Author Li, Shuqiang text Zootaxa 2013 3709 1 1 51 journal article 10.11646/zootaxa.3709.1.1 c243c467-9461-4e50-9c8c-5f9bb81e4da8 1175-5326 248830 496843C1-1D75-4B55-BFF2-370ECBAC11BB Belisana crystallina sp. nov. Figs 4–6 , 41 Type material. Holotype : Male ( IZCAS ), Tham Kamouk [ 17°37.912′N , 105°07.459′E , alt. 193 m ], 30.02 km northeast of Thakhek Town, Ban Kouanphavang Khammouane , Laos , 24 November 2012 , leg. Z. Yao (Yao-LA 058–059). Paratype : 1 female ( IZCAS ), same data as holotype . Etymology. The specific name is from Latin crystallinus (of crystal), in reference to the large, membranous apophysis of procursus; adjective. Diagnosis. The species can be easily distinguished from all known congeners by different distal elements of procursus ( Figs 4 A–D and 6A–B) and presence of two sclerites on epigynum ( Figs 5 A and 6D). Description. Male ( holotype ): Total length 1.67 (1.73 with clypeus), prosoma 0.55 long, 0.77 wide, opisthosoma 1.12 long, 0.59 wide. Leg I: 17.24 (4.04 + 0.31 + 4.29 + 7.05 + 1.55), leg II: 10.86 (2.81 + 0.29 + 2.66 + 4.09 + 1.01), leg III: 6.69 (1.87 + 0.25 + 1.56 + 2.38 + 0.63), leg IV: 9.63 (2.72 + 0.28 + 2.38 + 3.56 + 0.69); tibia I L/d: 57. Habitus as in Fig. 5 E. Dorsal shield of prosoma whitish, with black lateral margins; sternum whitish, without marks. Legs yellowish, but dark brown on patellae and tibia-metatarsus joints, without darker rings. Opisthosoma yellowish, without spots. Distance PME-PME 0.14, diameter PME 0.08, distance PME-ALE 0.02, AME absent. Ocular area not elevated. Thoracic furrow absent. Sternum about as wide as long (0.48). Chelicerae as in Figs 5 D and 6C, with a pair of thumb-shaped apophyses proximally and a pair of long, curved apophyses distally (distance between tips: 0.49). Pedipalpi as in Figs 4 A–B and 6A–B; trochanter with a short retrolateroventral apophysis; femur with a dorsal apophysis; procursus simple proximally but complex distally, with a membranous flap retrolaterally and a bent spine; bulb with a hooked apophysis and a simple embolus. Retrolateral trichobothrium of tibia I at 13%; most hairs lost on legs; tarsus I with about 10 distinct pseudosegments. FIGURE 4. Belisana crystallina sp. nov. , male holotype. A–B. Pedipalpus (A. Prolateral view; B. Retrolateral view); C–D. Distal part of procursus (C. Prolateral view; D. Retrolateral view). FIGURE 5. Belisana crystallina sp. nov. , male holotype (C–E) and female paratype (A–B, F–G). A. Epigynum, ventral view; B. Vulva, dorsal view; C. Bulb, prolateral view; D. Chelicerae, frontal view; E–G. Habitus (E–F. Dorsal view; G. Ventral view). FIGURE 6. Belisana crystallina sp. nov. , male holotype (A–C) and female paratype (D–E). A–B. Pedipalpus (A. Prolateral view; B. Retrolateral view); C. Chelicerae, frontal view; D. Epigynum, ventral view; E. Vulva, dorsal view. Scale bars: 0.10. Variation: Unknown. Female: Similar to male, habitus as in Figs 5 F–G. Total length 1.62 (1.69 with clypeus), prosoma 0.56 long, 0.65 wide, opisthosoma 1.06 long, 0.72 wide; tibia I: 3.36. Distance PME-PME 0.13, diameter PME 0.07, distance PME-ALE 0.02, AME absent. Epigynum ( Figs 5 A and 6D) simple and flat externally, with dark internal shade, a pair of indistinct sclerites, and a pair of pockets 0.40 apart. Vulva ( Figs 5 B and 6E) with a ridge-shaped arch anteriorly and a pair of nearly triangular pore plates. Distribution. Known only from the type locality ( Fig. 41 ).