Belisana yalong, 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 : 24

Belisana yalong sp. nov.

Figs 10–12 , 42–47

Type material: Holotype male, 2 males and 5 females paratypes, CHINA: Hainan Province, Dongfang City, Donghe Town, Yalong Village, a cave without special name (18°58.935´N, 108°53.196´E), 31 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. ketambe Huber, 2005 , but can be distinguished by the cheliceral distal apophyses (tips close together), the shape of procursus and the long bulbal apophyses.

Description: Male (holotype). Total length 1.08 (1.14 with clypeus), carapace width 0.5. Leg 1: 5.58 (1.46+0.18+1.48+1.7+0.76), tibia 2: 0.98, tibia 3: 0.46, tibia 4: 0.76; tibia 1 L/d: 25. Habitus as in figs 10 and 11. Carapace yellowish white, with indistinctive pair of brownish marks laterally, and a narrow median line on ocular area. Sternum whitish. Legs yellowish white, without darker rings. Opisthosoma whitish gray, without marks. Ocular area not elevated, thoracic furrow absent; distance PME-PME 0.04; diameter PME 0.06; distance PME-ALE 0.02; AME absent. Clypeus unmodified. Sternum slightly wider than long (0.4/0.36). Chelicerae as in fig. 45, with pair of curved apophyses, tips 0.13 apart. Palps as in figs 42, 43 and 44; 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 36%; legs without spines, vertical hairs, and curved hairs; tarsus 1 apparently with about 20 pseudosegments, but only about 10 quite distinct distally.

Variation. Tibia 1 in other two males: 1.32, 1.45. Distance between tips of distal cheliceral apophyses in other two males: 0.11, 0.12.

Females (paratypes). In general similar to male. Tibia 1 (n = 5): 1.06–1.22 (mean: 1.13). Epigynum simple and flat externally, with indistinctive internal dark structures visible through cuticle ( Figs 12 , 46 ), pockets 0.18 apart. Dorsal view as in fig. 47.

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 42 – 47. Belisana yalong sp. nov. 42 – 43. Male left palp, prolateral (42) and retrolateral (43) views; 44. Male left procursus, prolateral view; 45. Male chelicerae, frontal view; 46 – 47. Cleared epigynum, ventral (46) and dorsal (47) views. Scale lines: 0.1 mm.