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文章信息
- 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
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文章历史
- 收稿日期: 2015-09-09
- 接受日期: 2015-11-21
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.
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,1898;Simon,1909;Komatsu,1961;Paik,1978;王家福,1983;徐亚君,王家福,1984;胡金林,1985;屠黑锁,1994;Huber,2001,2005;Irie,2002;Zhang et al.,2006;Tong & Li,2007,2008,2009;Zhang et al.,2008;Chen et al.,2009;Yao & Li,2013;Yao et al.,2014,2015),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)
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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