Belisana lamellaris, Tong & Li, 2008

Tong, Yanfeng & Li, Shuqiang, 2008, Four New Species Of Six-Eyed Pholcid Spiders (Araneae: Pholcidae) From Hainan Island, China, Raffles Bulletin of Zoology 56 (1), pp. 45-53 : 47-52

Belisana lamellaris , new species

( Figs. 1 G–I, 4A–F)

Material examined. – Holotype: male ( IZCAS), Diaoluoshan Natural Reserve , Hainan Island, China, coll. Y. Song, X. Han and Y. Tong, 19 Apr.2005.

Paratypes: 2 males and 7 females ( IZCAS), same data as holotype .

Diagnosis. – The new species is similar to B. phurua Huber, 2005 , but can be distinguished by the absence of distal spine on procursus, the shape of bulbal apophyses, and the different female vulval structure.

Description. – Male (holotype). Total length 1.85 (1.94 with clypeus), carapace width 0.78. Leg 1: 13.48 (3.28+0.30+3.30+5.07+1.53), tibia 2: 1.87, tibia 3: 1.27, tibia 4: 1.90; tibia 1 L/d: 42. Habitus as in Fig. 1G and 1H . Carapace ochre-yellow, light brown margins laterally, sternum yellowish, Legs ochre-yellow except brown patella, without darker rings. Opisthosoma ochre-gray, with some dorsal darker spots. Ocular area not elevated, thoracic furrow absent; distance PME-PME 0.10; diameter PME 0.11; distance PME-ALE 0.02; AME absent. Clypeus unmodified. sternum slightly wider than long (0.57/0.53). Chelicerae as in Fig. 4B , with pair of curved apophyses, tips unmodified, 0.4 apart. Palps as in Fig. 4A, 4C and 4D ; trochanter with small retrolateral apophysis, femur with indistinct hump

THE RAFFLES BULLETIN OF ZOOLOGY 2008

THE RAFFLES BULLETIN OF ZOOLOGY 2008

proximo-dorsally, procursus with ventral membranous flap, bulb with hooked apophysis and complicated embolus. Retrolateral trichobothrium of tibia 1 at 14%; legs without spines, vertical hairs, and curved hairs; tarsus 1 apparently with> 20 pseudosegments, only about 15 quite distinct distally.

Variation. Tibia 1 in other males (n = 2): 3.37, 3.5. Distance between tips of distal cheliceral apophyses in other males (n = 2): 0.45, 0.38. Dorsal darker spots on opisthosoma indistinctive in one male.

Females. In general, similar to male. Tibia 1 in females (n = 7): 2.22–2.65 (mean: 2.48). Epigynum simple and flat externally, with distinctive internal dark structures visible through cuticle ( Figs. 1I and 4E ), pockets 0.33 apart. Dorsal view as in Fig. 4F .

Etymology. – The specific name is an adjective from Latin, and refers to the narrow sheet-like elongation on the bulbal apophysis of the male palp.

Distribution. – Hainan, China (present study).

Figures

Fig. 1. A–C, Belisana aliformis, new species; D–F, Belisana huberi, new species; G–I, Belisana lamellaris, new species; J–L, Khorata diaoluoshanensis, new species. A, D, G, J, male habitus, dorsal view; B, E, H, K, male habitus, lateral view; C, F, I, L, female abdomen, ventral view.

Fig. 4. A, Belisana lamellaris, new species, male left palp, prolateral view; B, male chelicerae, frontal view; C, male bulb with bulbal apophysis and embolus, laterodorsal view; D, male left palp, retrolateral view; E–F, cleared epigynum, ventral (E) and dorsal (F) views. Scale bars = 0.2 mm.