2015, Vol. 34扩展功能
文章信息
- 蒋玄空, 陈会明
- JIANG Xuankong, CHEN Huiming
- 贵州龙角蛛属一新种记述(蜘蛛目:漏斗蛛科)
- One New Spider Species of Genus Draconarius (Araneae, Agelenidae) from Guizhou, China
- 四川动物, 2015, 34: 418-420
- Sichuan Journal of Zoology, 2015, 34: 418-420
- 10.3969/j.issn.1000-7083.2015.03.018
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文章历史
- 收稿日期：2014-11-11
- 接受日期：2014-12-25
2. 贵州科学院生物研究所, 贵阳550009
2. Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, China
Draconarius drepanoides sp. nov.
Holotype. Male, Mt. Taiyang, Congjiang county, Qiandongnan Miao and Dong Autonomous Prefecture, Guizhou province, 25°36.402'N, 108°18.718'E, Alt. 1120 m, 28 September 2014, collected by Huiming Chen and Tian Lu.
Etymology: The specific name comes from the Latin words "drepanoides", meaning "sickle-shaped" and refers to the shape of the conductor; adjective.
Diagnosis: This new species is similar to D. bifarius Wang & Martens, 2009 (Page 462, figs 4~5), but can be distinguished by the sickle-shaped conductor, the closely connected median apophysis with tegular sclerite and the absence of patellar apophysis (Figs 2, 3, 5, 6). This new species is also similar to D. falcatus Xu & Li, 2006 (Page 5, figs 5~7), but can be recognized by the spoon-like median apophysis, the absence of patellar apophysis and the not bifurcated distal of conductor (Figs 2, 3, 5, 6).
Description: holotype male (Fig 7). Total length 8.44: carapace 4.58 long, 3.28 wide; abdomen 3.87 long, 2.59 wide. Eye sizes and interdistances: diameter of anterior median eyes (AME) 0.13, diameter of anterior lateral eyes (ALE) 0.21, diameter of posterior median eyes (PME) 0.17, diameter of posterior lateral eyes (PLE) 0.20; distance between AME and AME (AME-AME) 0.07, distance between AME and ALE (AME-ALE) 0.05, distance between PME and PME (PME-PME) 0.10, distance between PME and PLE (PME-PLE) 0.18, distance between ALE and PLE (ALE-PLE) 0.06. Median ocular area (MOA) 0.48 long, 0.47 front width, 0.34 back width. Clypeus 0.16 height. Chelicerae with 3 promarginal and 2 retromarginal teeth. Leg measurements: Ⅰ 12.96 (3.56+4.19+3.17+2.04), Ⅱ 11.54 (3.21+3.79+2.80+1.74), Ⅲ 11.40 (3.29+3.57+3.04+1.50), Ⅳ 14.32 (3.88+4.74+3.96+1.74). Leg formula: 4123. Male palp (Figs 1~6) with the absence of patellar apophysis, RTA strong, lateral apophysis small. Embolus slender. Conductor with transparent lamella and sickle-shaped end. Conductor dorsal apophysis present. Median apophysis spoon-like. Cymbial furrow deep, its length was about a half of cymbium.
Female: unknown.
Distribution: China (Guizhou province).
龙角蛛属Draconarius由Ovtchinnikov于1999年建立，隶属于漏斗蛛科Agelenidae隙蛛亚科Coelotinae(Miller et al.，2010)，是目前隙蛛亚科多样性最丰富的属。全世界已知241种，主要分布于东亚和周边区域，其中在中国分布的有151种(Platnick，2014)。王新平曾对全世界的隙蛛亚科进行了属级和部分属的种级修订(Wang，2002，2003)。由他修订后的龙角蛛属与亚隙蛛属Iwogumoa Kishida，1955相似:跗舟沟长，插入器细长;纳精囊长且强烈盘绕。雌蛛区别于亚隙蛛属的特征为:龙角蛛属交配管后位起源，纳精囊相互远离;雄蛛具有引导器背突(Wang，2002;朱明生，陈会明，2009)。近十几年来，除王新平(Wang et al.，2010)外，国内学者张志升(张志升等，2002;Zhang et al.，2005)、徐湘(Xu & Li，2006，2007，2008)、陈会明(Chen et al.，2008;朱明生，陈会明，2009)和刘杰(Liu & Li，2009)等都对该属进行过研究或种类报道，但我国龙角蛛的生物多样性调查仍未完成。作者在鉴定采自贵州省黔东南月亮山保护区的标本时，发现该属一新种，将其命名为镰刀龙角蛛Draconarius drepanoides sp. nov.。本文测量单位均为mm。模式标本保存于西南大学生命科学学院。 镰刀龙角蛛Draconarius drepanoides sp. nov.
正模♂，贵州省从江县月亮山自然保护区加牙村太阳山(25°36.402'N，108°18.718'E，Alt.: 1120 m)，2014年9月28日，陈会明、陆天采。
词源学:新种种名源自希腊来源的拉丁词"drepanoides"，意为"镰刀状的"，指的是本新种引导器的形状。
鉴别特征:该新种近似于双龙角蛛D. bifarius Wang & Martens，2009(Page 462，figs 4~5)，主要区别有:引导器(C)末端腹面观时向后弯曲呈镰刀状(后者稍弯曲)，中突(MA)腹面观时前端靠近盾板骨片(后者远离)，膝节无突起(后者具1个较大的突起)(图版Ⅰ: 2，3，5，6)。该新种还近似于镰状龙角蛛D. falcatus Xu & Li，2006(Page 5，figs 5~7)，但可通过中突勺状(后者为一小且尖锐的突起)、无膝节突(后者具2个膝节突)和引导器末端不分叉(后者末端分叉)等特征(图版Ⅰ: 2，3，5，6)区分。
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图版 Ⅰ 镰刀龙角蛛，新种Draconarius drepanoides sp. nov.
1，4. 雄蛛左触肢器，内侧面观(left male palp，prolateral view); 2，5. 雄蛛左触肢器，腹面观(left male palp，ventral view); 3，6. 雄蛛左触肢器，外侧面观(left male palp，retrolateral view); 7. 雄蛛背面观(male body，dorsal view)。 C. conductor 引导器; CDA. conductor dorsal apophysis 引导器背突; CF. cymbial furrow 跗舟沟; CL. conductor lamella 引导器薄片; E. embolus 插入器; LTA. lateral tibial apophysis 胫节侧突; MA. median apophysis 中突; RTA. retrolateral tibial apophysis 胫节外侧突; ST. subtegulum 亚盾板; T. tegulum 盾板; TS. tegular sclerite 盾板骨片。 |
描述:正模(图版Ⅰ:7)体长8.44。头胸部长4.58，头胸部宽3.28;腹部长3.87，腹部宽2.59。背甲黄褐色，梨形。螯肢粗壮，红褐色。螯肢前齿堤具3齿，后齿堤2齿。8眼两列，集中于头区前方。前中眼直径0.13;前侧眼直径0.21;后中眼直径0.17;后侧眼直径0.20。前中眼至前中眼距离0.07;前中眼至前侧眼距离0.05;后中眼至后中眼距离0.10;后中眼至后侧眼距离0.18;前侧眼至后侧眼距离0.06。中眼域长0.48;前边宽0.47;后边宽0.34。额高0.16。中窝深，纵向;颈沟、放射沟明显。步足细长，黄褐色，多刺。步足测量:Ⅰ 12.96(3.56+4.19+3.17+2.04)，Ⅱ 11.54(3.21+3.79+2.80+1.74)，Ⅲ 11.40(3.29+3.57+3.04+1.50)，Ⅳ 14.32(3.88+4.74+3.96+1.74)。步足式:4123。腹部卵圆形，黄色，有不规则黑色斑点。密被黑色细毛。腹部背面心脏斑和"人"字斑不明显。后侧纺器2节，淡黄色。
触肢器(图版 Ⅰ:1~6)无膝节突;具有胫节外侧突和胫节侧突;跗舟沟深，长度长于跗舟长度的一半;中突勺状，基部有一突起;引导器末端弯曲，呈镰刀状;具引导器背突;插入器细长，起源于6点钟方向。
雌蛛未知。
分布:贵州省(从江县)。
致谢:感谢西南大学生命科学学院研究生陆天参与了标本采集。| 张志升, 朱明生, 宋大祥. 2002. 湖北神农架隙蛛亚科(蜘蛛目: 暗蛛科)三新种[J]. 保定师范专科学校学报, 15(2): 52-55. |
| 朱明生, 陈会明. 2009. 贵州洞穴龙隙蛛属2新种(蜘蛛目: 暗蛛科: 隙蛛亚科)[J]. 河北大学学报: 自然科学版, 29(2): 184-187. |
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