四川动物  2016, Vol. 35 Issue (): 227-230

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陈会明, 余志刚, 郭轩
CHEN Huiming, YU Zhigang, GUO Xuan
贵州贝尔蛛属一新种记述(蜘蛛目:幽灵蛛科)
One New Spider Species of Genus Belisana (Araneae: Pholcidae) from Guizhou, China
四川动物, 2016, 35(): 227-230
Sichuan Journal of Zoology, 2016, 35(): 227-230
10.11984/j.issn.1000-7083.20150275

文章历史

收稿日期: 2015-09-09
接受日期: 2015-11-21
贵州贝尔蛛属一新种记述(蜘蛛目:幽灵蛛科)
陈会明, 余志刚, 郭轩*     
贵州科学院生物研究所, 贵阳 550009
摘要: 记述采自贵州省施秉县贝尔蛛属Belisana一新种,李氏贝尔蛛Belisana lii sp. nov.。该新种近似于沿河贝尔蛛Belisana yanhe Chen et al.,2009,主要区别有:本种跗前突末端为3层膜片叠加,且顶部形成具2个小的椎形结构,而后者仅有2层膜片叠加,顶部只形成1个三角形结构;雄蛛螯肢末突长而末端强烈向后弯曲,雄蛛螯肢下侧突向内弯曲等特征区分。模式标本保存于贵州科学院生物研究所。
关键词: 幽灵蛛科     新种     贵州    
One New Spider Species of Genus Belisana (Araneae: Pholcidae) from Guizhou, China
CHEN Huiming, YU Zhigang, GUO Xuan*     
Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, China
Abstract: A new species, Belisana lii sp. nov., collected from Shibing county, Guizhou province, was described, photographed and illustrated. Type specimens are deposited in the Institute of Biology, Guizhou Academy of Sciences, Guiyang, China. All measurements are given in mm.
Belisana lii sp. nov. (Plate Ⅰ: 1~4; Plate Ⅱ: 5~9)
Type material. Holotype: ♂, Tankan cave, Labatong, Niudachang town, Shibing county, Guizhou province, China, 27°12.495'N, 108°01.884'E, Alt.: 1 051 m, 19 July 2012, collected by H.M. Chen and X. Guo. Paratype: 1♂ and 3 ♀♀, same data as holotype.
Etymology: The specific name a patronym in honor of the Pro. Zhumei Li; noun in genitive case.
Diagnosis: Distinguished from those relatives by the shapes of procursus (Plate Ⅰ: 3~4; Plate Ⅱ: 5~6), bulbul projections (Plate Ⅰ: 3, Plate Ⅱ: 5) on the male, and the female genitalia (external aspect and internal structures, Plate Ⅱ: 8). The new species is similar to B. yanhe Chen et al., 2009 by the tile-shape embolus and membranous end part of procursus. Distinguished from B. yanhe by 3 layered membranes at the end (Plate Ⅱ: 5), and 2 subuliform formations on the tip of procursus (Plate Ⅱ: 6), while in B. yanhe, only 2 layered membranes and 1 triangular formation; the distal apophysis on male chelicerae (DA) bend entad at the end (Plate Ⅱ: 9) and the proximolateral apophysis on male chelicerae (PLA) bend forth at the end (Plate Ⅱ: 9), the DA bend forth at the end and PLA without bend in B. yanhe.
Description: Male holotype. Total length 1.22 (1.32 with clypeus), carapace width 0.36. Leg Ⅰ: 7.45 (2.20+0.15+2.34+2.43+0.33), tibia Ⅱ: 1.52, tibia Ⅲ: 1.70, tibia Ⅳ: 1.36; tibia Ⅰ L/d: 67. Habitus as in Plate Ⅰ: 1. Carapace cream-colored, with dark lateral marks down the carapace. Thoracic furrow absent (Plate Ⅰ: 1). Sternum yellowish, legs yellowish, without darker rings on coxa. Opisthosoma milk-white, with darker spots (Plate Ⅰ: 1), without sparse hairs. Ocular area not elevated, six eyes in two triads, distance PME-PME 0.07; diameter PME 0.05; distance PME-ALE 0.01. Clypeus modified. Sternum 0.29 long, 0.30 wide. Chelicerae as in Fig. 9, with pair of curved apophyses, tips modified, 0.33 apart. Palps as in Plate Ⅰ: 3~4; Plate Ⅱ: 5~6; trochanter with retrolateral apophysis, procursus without spine (Plate Ⅰ: 3~4; Plate Ⅱ: 5~6) and with ventral membranous flap (broad), bulb with hooked apophysis (Plate Ⅰ: 3, Plate Ⅱ: 5). Retrolateral trichobothrium of tibia Ⅰ lost maybe; legs without spines and curved hairs; tarsus Ⅰ with approximately 24 pseudosegments.
Female paratype. In general similar to male. Epigynum simple externally (Plate Ⅱ: 7), dorsal view as in Plate Ⅱ: 8. Opisthosoma milk-white, with some slightly darker spots visible through cuticle dorso-laterally.
Key words: Pholcidae     new species     Guizhou    

贝尔蛛属Belisana由T. Thorell于1898年建立,后来Huber(2005)作了全面的修订并描述了一些新的种类。到目前为止,全球已知有贝尔蛛属111种(World Spider Catalog,2015),主要分布于中国(贵州、海南、安徽、广东、广西、云南、福建、西藏),帕劳群岛,日本,韩国,印度尼西亚,泰国,菲律宾,澳大利亚,越南,斯里兰卡,老挝,印度,斐济,巴布亚新几内亚,新加坡,马来西亚,缅甸,加罗林群岛(Thorell,1898Simon,1909Komatsu,1961Paik,1978王家福,1983徐亚君,王家福,1984胡金林,1985屠黑锁,1994Huber,20012005Irie,2002Zhang et al.,2006;Tong & Li,200720082009Zhang et al.,2008Chen et al.,2009Yao & Li,2013Yao et al.,20142015),中国已报道30种。

陈会明等:贵州贝尔蛛属一新种记述(蜘蛛目:幽灵蛛科)贝尔蛛类群属于热带分布类型的蜘蛛,主要分布于东南亚地区。分布贵州的种类已知有5种,大部分(4种)都采集于喀斯特洞穴中,本新种也采集于喀斯特洞穴。

作者在鉴定采自贵州省的幽灵蛛科标本时,发现贝尔蛛属一新种,将其命名为李氏贝尔蛛Belisana lii sp. nov.。本文测量单位均为mm。分类学描述和术语根据Huber(2005)的标准。模式标本保存于贵州科学院生物研究所。

李氏贝尔蛛Belisana lii sp. nov.( 图版 Ⅰ :1~4;图版 Ⅱ :5~9)

图版 Ⅰ 李氏贝尔蛛, 新种Belisana lii sp. nov. Plate Ⅰ Belisana lii sp. nov. 1. 雄蛛Male body, 背面观dorsal view; 2. 雌蛛Female body, 背面观dorsal view; 3. 雄蛛左触肢器Left male palp, 内侧面观prolateral view; 4. 雄蛛左触肢器Left male palp, 外侧面观retrolateral view.
图版Ⅱ 李氏贝尔蛛, 新种Belisana lii sp. nov. Plate Ⅱ Belisana lii sp. nov. 5. 雄蛛左触肢器Left male palp, 内侧面观prolateral view; 6. 雄蛛左触肢器Left male palp, 外侧面观retrolateral view; 7. 雌蛛外雌器,腹面观Female genitalia, ventral view; 8. 雌蛛外雌器, 背面观Female genitalia, dorsal view; 9. 雄蛛螯肢, 前面观Male chelicerae, frontal view; BA. 雄蛛触肢球突bulbal apophysis,DA. 雄蛛螯肢末突distal apophysis on male chelicerae,E. 插入器embolus,F. 跗前突膜membranous flap on procursus,PLA. 雄蛛螯肢下侧突proximolateral apophysis on male chelicerae,PP. 孔板pore plate,PR. 跗前突procursus.

正模 ♂,贵州省施秉县牛大场镇喇叭筒塘坎洞(27°12.495′N,108°01.884′E,海拔:1 051 m),2012年7月19日,陈会明、郭轩采。副模:1 ♂,3♀♀,采集信息同正模。

词源学: 新种种名源自贵州科学院生物研究所李筑眉教授的姓氏“Li”,以此感谢他多年来对我们研究工作的鼓励和支持。

鉴别特征: 区别于其他种的特征是,跗前突的形状(PR,图版 Ⅰ:3~4,图版Ⅱ:5~6),生殖球突形状(BA,图版 Ⅰ:3,图版Ⅱ:5),外雌器结构(图版Ⅱ:7~8)。本新种类似于B. yanhe Chen et al.,2009雄蛛触肢都具有瓦状插入器及跗前突末端的相似膜状结构,这也是与本属其他种的最大区别。但本种跗前突末端为3层膜片叠加,且顶部形成具2个小的锥形结构,而后者仅有2层膜片叠加,顶部只形成1个三角形结构;雄蛛螯肢末突(DA)末端部分强烈向后弯曲(图版Ⅱ:9),雄蛛螯肢下侧突(PLA)向外弯曲(图版Ⅱ:9),而B. yanhe雄蛛螯肢末突末端是向前弯曲,螯肢下侧突不弯曲。

描述: 正模(图版 Ⅰ:1),雄蛛,体长1.8(包括额1.9)。头胸部宽0.36。步足Ⅰ:7.45(2.20+0.15+2.34+2.43+0.33),胫节Ⅱ 1.52,胫节Ⅲ 1.70,胫节Ⅳ 1.36;胫节Ⅰ长:宽=67。体形如图版 Ⅰ:1。背甲乳黄色,具暗色侧斑,无中沟(图版 Ⅰ:1);胸板乳黄色。步足淡黄色,基节无暗色环。腹部乳白色,具暗色斑(图版Ⅰ:1),无毛。眼域不隆起,6眼2丛;眼距,PME-PME 0.07;眼径,PME 0.05;眼距,PME-ALE 0.01。额末特化。胸板长0.29,宽0.30。螯肢如图版Ⅱ:9,具1对曲突,末端特化,相互距离为0.33。触肢如图版 Ⅰ:3~4,图版Ⅱ:5~6;转节具后侧突;跗前突无刺(图版 Ⅰ:3~4,图版 Ⅰ:5~6);具宽阔的腹膜;生殖球具钩状突(图版 Ⅰ:3、图版Ⅱ:5)。胫节Ⅰ后侧听毛可能脱落;步足无刺和曲毛;跗节Ⅰ具约24个伪节。

副模,雌蛛,总体类似于雄蛛。外雌器外观简单(图版Ⅱ:7);背面观如图版Ⅱ:8。腹部乳白色,具暗色斑,透过表皮可见。

分布: 目前仅知分布于模式标本的采集地。

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