Research Article |
Corresponding author: Dinh-Sac Pham ( phamdinhsac@gmail.com ) Academic editor: Shuqiang Li
© 2015 Dinh-Sac Pham.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Pham D-S (2015) One new species of the genus Belisana Thorell, 1898 (Araneae, Pholcidae) from northern Vietnam. ZooKeys 480: 41-47. https://doi.org/10.3897/zookeys.480.9046
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One new species Belisana denticulata sp. n. (♂) is reported from northern Vietnam based on material collected by fogging the forest canopy. This species resembles B. scharffi Huber, 2005, but can be distinguished by relatively long distance between proximal parts of proximo-lateral apophysis and distal apophysis on male chelicerae, by presence of a nearly saddle-shaped prolateral sclerite on procursus, and by different shape of retrolateral membranous flap on procursus. Type specimens are deposited in the Vietnam Academy of Science and Technology in Hanoi.
Taxonomy, pholcid, Southeast Asia, fogging, canopy
Belisana Thorell, 1898, the second largest genus in Pholcidae C.L. Koch, 1850, includes 110 species (
During examination of the spider material collected by fogging in Tam Dao National Park, a new species of the genus Belisana was founded. In the current paper, description of the new species is provided; the detailed structure of pedipalp is photographed and illustrated.
Specimens were examined and measured with a Leica M205 C stereomicroscope. Details were studied with an Olympus BX51 compound microscope. Illustrations were made using a camera lucida attached to the Olympus BX51 microscope, and inked using an ink jet plotter. Male copulatory organs were examined and illustrated after they were dissected from the spiders. Type specimens were preserved in 75% ethanol solution. Photographs were taken with an Olympus C7070 wide zoom digital camera (7.1 megapixels) mounted on a Leica M205 C stereomicroscope. The images were assembled using Helicon Focus 3.10 image stacking software. All measurements are given in millimeters. Leg measurements are shown as: Total length (femur + patella + tibia + metatarsus + tarsus). Leg segments were measured on their dorsal side. Distribution map was generated with ArcView GIS 3.2. Terminology and taxonomic descriptions follow
The following abbreviations are used in the description: ALE = anterior lateral eye, AME = anterior median eye, PME = posterior median eye, L/d = length/diameter.
Belisana tauricornis Thorell, 1898
Holotype: ♂, fogging, natural forest (21°31.501'N, 105°33.434'E, elevation 1060 m), Tam Dao National Park, Vinh Phuc, Vietnam, 26 July 2008, D.S. Pham leg. Paratype: 1 ♂, same data but disturbed forest (21°28.337'N, 105°38.094'E, elevation 1007 m).
The specific name is derived from the Latin denticulatus (with small teeth), in reference to the small teeth on the prolateral sclerite of the distal procursus; adjective.
This species resembles B. scharffi Huber, 2005 (see
Belisana denticulata sp. n., holotype male. A–B Pedipalp (A Prolateral view, arrow points at nearly saddle-shaped sclerite B Retrolateral view) C–D Distal part of procursus (C Prolateral view, arrow points at nearly saddle-shaped sclerite D Retrolateral view). b = bulb, ba = bulbal apophysis, e = embolus, pr = procursus.
Belisana denticulata sp. n., holotype (A–C) and paratype (D) males. A–B Pedipalp (A Prolateral view, arrow points at nearly saddle-shaped sclerite B Retrolateral view) C Chelicerae, frontal view D Bulb, prolateral view. b = bulb, ba = bulbal apophysis, e = embolus, f = membranous flap, pr = procursus.
Male (holotype): Total length 1.97 (2.09 with clypeus), prosoma 0.74 long, 0.80 wide, opisthosoma 1.23 long, 0.84 wide. Leg I: – (3.72 + 0.36 + – + – + –), leg II: 10.78 (2.95 + 0.34 + 2.62 + 3.89 + 0.98), leg III: 6.96 (1.87 + 0.30 + 1.72 + 2.41 + 0.66), leg IV: 9.22 (2.60 + 0.31 + 2.34 + 3.25 + 0.72). Habitus as in Fig.
Variation. In another male: Tibia I: 3.37; tibia I L/d: 45. Retrolateral trichobothrium of tibia I at 13% proximally; tarsus I with about 12 distinct pseudosegments.
Female. Unknown.
The manuscript benefited greatly from comments by Zhiyuan Yao (Institute of Zoology, Chinese Academy of Sciences) and Feng Zhang (Hebei University, Baoding). This study was supported by the NAFOSTED grant (code 106.12.2010.18 from the M.O.S.T. of Vietnam).