Belisana exian, Tong, Yanfeng & Li, Shuqiang, 2009

Tong, Yanfeng & Li, Shuqiang, 2009, Six new cave-dwelling pholcid spiders (Araneae: Pholcidae) from Hainan Island, with two newly recorded genera from China, Zootaxa 1988, pp. 17-32 : 18-19

Belisana exian sp. nov.

Figs 4–6 , 30–34

Type material: Holotype male, 1 male and 7 females paratypes, CHINA: Hainan Province, Dongfang City, Donghe Town, Nanlang Village, E´xian Cave (19°00.426´N, 109°05.345´E), 29 March 2005, Y. Song, X. Han, Y. Tong and G. Deng leg.

Etymology: The specific name is a noun in apposition, taken from the type locality.

Diagnosis: The new species is similar to B. gedeh Huber, 2005 , but can be distinguished by the shapes of procursus, the narrowly separated cheliceral apophyses and the position of female epigynal pocket.

Description: Male (holotype). Total length 1.26 (1.36 with clypeus), carapace width 0.56. Leg 1: 8.33 (2.02+0.22+2.13+2.87+1.09), tibia 2: 1.48, tibia 3: 0.98, tibia 4: 1.36; tibia 1 L/d: 35. Habitus as in figs 4 and 5. Whole body yellowish white; carapace and opisthosoma both without marks. Ocular area not elevated, thoracic furrow absent; distance PME-PME 0.11; diameter PME 0.04; distance PME-ALE 0.01; AME absent. Clypeus unmodified. Sternum slightly wider than long (0.41/0.35). Chelicerae as in fig. 32, with pair of curved apophyses, tips 0.24 apart. Palps as in figs 30 and 31; trochanter with short retrolateral apophysis, femur with indistinct hump proximo-dorsally, procursus complicated distally, with ventral membranous flap, bulb with hooked apophysis and simple embolus. Retrolateral trichobothrium of tibia 1 at 30%; legs without spines, vertical hairs, and curved hairs; tarsus 1 apparently with about 15 pseudosegments, but only about 10 quite distinct distally.

Variation. Tibia 1 in other male: 2.37. Distance between tips of distal cheliceral apophyses in other male: 0.23.

Females (paratypes). In general similar to male. Tibia 1 (n = 7): 1.8–2.12 (mean: 1.94). Epigynum simple and flat externally, with internal structures visible through cuticle ( Figs 6 , 33 ), pockets 0.15 apart. Dorsal view as in fig. 34.

Figures

FIGURES 1 – 23. Belisana desciscens sp. nov., 1 – 3; Belisana exian sp. nov., 4 – 6; Belisana maogan sp. nov., 7 – 9; Belisana yalong sp. nov., 10 – 12; Modisimus culicinus (Simon, 1893), 13 – 15; Pholcus exceptus sp. nov., 16 – 19; Holocneminus huangdi sp. nov., 20 – 23. (1, 4, 7, 10, 13, 16, 20, male habitus, dorsal view; 2, 5, 8, 11, 14, 17, 21, male habitus, lateral view; 3, 6, 9, 12, 15, 18, 23, female abdomen, ventral view; 19, 22, male sternum, ventral view.)

FIGURES 30 – 34. Belisana exian sp. nov. 30 – 31. Male left palp, prolateral (30) and retrolateral (31) views; 32. Male chelicerae, frontal view; 33 – 34. Cleared epigynum, ventral (33) and dorsal (34) views. Scale lines: 0.1 mm.