Belisana tadetuensis, Yao, Zhiyuan & Li, Shuqiang, 2013

Yao, Zhiyuan & Li, Shuqiang, 2013, New and little known pholcid spiders (Araneae: Pholcidae) from Laos, Zootaxa 3709 (1), pp. 1-51 : 20-27

Belisana tadetuensis sp. nov.

Figs 19–21 , 41

Type material. Holotype: Male ( IZCAS), underside of leaves, Tad Etu [15°11.526′N, 106°06.209′E, alt. 930 m], Champasak, Laos, 17 November 2012, leg. Z. Yao (Yao-LA 012–020).

Etymology. The specific name refers to the type locality; adjective.

Diagnosis. The species can be easily distinguished from all known congeners by different shape of distal apophyses of male chelicerae ( Figs 20 B and 21C) and different shape of distal sclerites of procursus ( Figs 19 A, C and 21A).

Description. Male (holotype): Total length 1.36 (1.45 with clypeus), prosoma 0.53 long, 0.56 wide, opisthosoma 0.83 long, 0.49 wide. Legs I and IV lost, leg II: 7.36 (2.01 + 0.25 + 1.80 + 2.50 + 0.80), leg III: 4.86 (1.40 + 0.21 + 1.20 + 1.55 + 0.50). Habitus as in Figs 20 C–E. Dorsal shield of prosoma and sternum whitish, without marks. Legs II and III yellowish, but dark brown on patellae and tibia-metatarsus joints, without darker rings. Opisthosoma whitish, without spots. Distance PME-PME 0.13, diameter PME 0.06, distance PME-ALE 0.01, AME absent. Ocular area not elevated. Thoracic furrow absent. Sternum about as wide as long (0.40). Chelicerae as in Figs 20 B and 21C, with a pair of thumb-shaped apophyses proximally and a pair of long, curved apophyses distally (distance between tips: 0.09). Pedipalpi as in Figs 19 A–B and 21A–B; trochanter with a short retrolatero-ventral apophysis; femur with a ventral apophysis; procursus simple proximally but complex distally, with a membranous flap retrolaterally; bulb with a hooked apophysis and a simple embolus. Legs II and III with short vertical hairs on metatarsi, without spines and curved hairs.

Variation: Unknown.

Female: Unknown.

Distribution. Known only from the type locality ( Fig. 41 ).

Figures

FIGURE 19. Belisana tadetuensis 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 20. Belisana tadetuensis sp. nov., male holotype. A. Bulb, prolateral view; B. Chelicerae, frontal view; C – E. Habitus (C. Dorsal view; D. Ventral view; E. Lateral view).

FIGURE 21. Belisana tadetuensis sp. nov., male holotype. A – B. Pedipalpus (A. Prolateral view; B. Retrolateral view); C. Chelicerae, frontal view; D. Bulb, prolateral view. Scale bars: 0.10.

FIGURE 41. Known distribution of new species of Pholcidae from Laos. 1. Belisana champasakensis sp. nov.; 2. B. crystallina sp. nov.; 3. B. gigantea sp. nov.; 4. B. khanensis sp. nov.; 5. B. lancea sp. nov.; 6. B. martensi sp. nov.; 7. B. tadetuensis sp. nov.; 8. B. xiangensis sp. nov.; 9. Calapnita longa sp. nov.; 10. Khorata circularis sp. nov.; 11. K. dupla sp. nov.; 12. Pholcus arcuatilis sp. nov.; 13. P. sublaksao sp. nov.; 14. Spermophora falcata sp. nov.