生物多样性  2018 , 26 (3): 274-282 https://doi.org/10.17520/biods.2018062

生物编目

中国淡水蟹分类与分布名录(十足目: 拟地蟹科, 溪蟹科)

楚克林, 马晓萍, 张泽伟, 王鹏飞, 吕琳娜, 赵强, 孙红英*

南京师范大学生命科学学院, 江苏省生物多样性与生物技术重点实验室, 南京 210023

A checklist for the classification and distribution of China’s freshwater crabs

Kelin Chu, Xiaoping Ma, Zewei Zhang, Pengfei Wang, Linna Lü, Qiang Zhao, Hongying Sun*

Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing 210023

通讯作者:  * 通讯作者 Author for correspondence. E-mail: sunhongying@njnu.edu.cn

收稿日期: 2018-02-23

接受日期:  2018-03-29

网络出版日期:  2018-03-20

版权声明:  2018 《生物多样性》编辑部 版权所有.《生物多样性》编辑部

基金资助:  国家自然科学基金(31471972, 31772427)

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摘要

中国是世界上淡水蟹物种多样性最高的国家。然而, 迄今为止还没有一个系统的、涵盖全国范围的淡水蟹分类和分布名录。本文收集了涉及中国淡水蟹分类和分布的文献, 采用国际上更新的短尾下目淡水蟹类高级阶元分类系统, 通过系统梳理, 汇编成中国淡水蟹分类与分布名录。该名录共收录了截至2018年1月记述的所有中国淡水蟹类, 共计2科45属311种。其中, 拟地蟹科(Gecarcinucidae Rathbun, 1904) 1属28种; 溪蟹科(Potamidae Ortmann, 1896) 44属283种及亚种; 中国特有属共计38属, 占总数的84%; 特有种共计302种, 占97%。对各省淡水蟹的分布分析发现, 云南是中国淡水蟹物种多样性最丰富的省份, 已记述16属50种; 其次为台湾(4属41种)。本名录首次全面概括了中国淡水蟹类的分类和分布, 可为深入开展全国范围的淡水蟹类生物多样性保护提供科学依据。

关键词: 淡水蟹 ; 分类 ; 多样性 ; 特有 ; 名录

Abstract

China has the highest species-richness of freshwater crabs in the world. However, due to the recent and rapid discoveries of freshwater crab species in China there is currently no systematic checklist for classification. Here we present for the first time a checklist of all freshwater crab species found in China that follows the latest classification of Brachyura by Ng et al (2008). The checklist is based on the most recent taxonomic literature and provides updated distributions for each species. There are 311 species of Chinese freshwater crabs in 45 genera and two families. The Potamidae Ortmann, 1896, includes 44 genera and 283 species and subspecies, while the Gecarcinucidae Rathbun, 1904, includes one genus and 28 species. The degree of endemism was found to be high, with 302 species and subspecies (97%), and 38 genera (84%) that are found only in China. The highest species diversity occurs in Yunnan Province (16 genera and 50 species), followed by Taiwan (4 genera and 41 species). The checklist provides a baseline for further studies of the freshwater crabs of China and will be a particularly important reference point for future conservation projects.

Keywords: freshwater crab ; classification ; diversity ; endemic ; checklist

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楚克林, 马晓萍, 张泽伟, 王鹏飞, 吕琳娜, 赵强, 孙红英. 中国淡水蟹分类与分布名录(十足目: 拟地蟹科, 溪蟹科)[J]. 生物多样性, 2018, 26(3): 274-282 https://doi.org/10.17520/biods.2018062

Kelin Chu, Xiaoping Ma, Zewei Zhang, Pengfei Wang, Linna , Qiang Zhao, Hongying Sun. A checklist for the classification and distribution of China’s freshwater crabs[J]. Biodiversity Science, 2018, 26(3): 274-282 https://doi.org/10.17520/biods.2018062

淡水蟹俗称溪蟹或初生淡水蟹(primary freshwater crab), 系指整个生活史大都在陆地淡水环境中度过, 其卵直接发育成幼蟹而不经过浮游幼体阶段的蟹类, 隶属软甲纲(Malacostraca)十足目(Decapoda)短尾下目(Brachyura), 已记述的物种超过1,320种(Daniels et al, 2015)。淡水蟹是淡水底栖大型无脊椎动物类群中的关键种, 是健康水域生态环境重要的指示生物。中国是全球淡水蟹物种多样性最高的国家, 已记述的物种总数远超过位居其次的泰国和哥伦比亚(均为101种; Cumberlidge et al, 2009)。中国淡水蟹类包括溪蟹科(Potamidae Ortmann, 1896)和拟地蟹科(Gecarcinucidae Rathbun, 1904)两个科, 其物种多样性以溪蟹科占主导。对中国淡水蟹类的分类研究始于1798年, Fabricius第一次报道了中国淡水蟹1新种: 褶痕束腰蟹Somanniathelphusa plicatus (Fabricius, 1798)。1853年, H. Milne-Edwards报道了分布在长江中游地区的溪蟹科1新种: 锯齿华溪蟹[Sinopotamon denticulatum (H. Milne-Edwards, 1853)](戴爱云, 1999)。我国学者对国内淡水蟹的分类研究始于1934年, 由中国科学院水生生物学家伍献文先生早年在广西地区开展淡水蟹类调查, 并描述和发表了3个溪蟹科新种, 包括: 罗城近溪蟹[Potamiscus loshingensis (Wu, 1934)]、紫螯异掌溪蟹[Heterochelamon purpureomanuale (Wu, 1934)]和镜头华石蟹[Sinolapotamon patellifer (Wu, 1934)]。随后, 我国甲壳动物学研究的奠基人沈嘉瑞先生于1940年发表了在香港发现的溪蟹科1新种: 香港南海溪蟹[Nanhaipotamon hongkongense (Shen, 1940)]。此后, 中国淡水蟹分类和新种发现经历了近30年的停滞期(图1)。在此期间, 沈嘉瑞和戴爱云两位先生于1964年编著出版了《中国动物图谱: 甲壳动物》(第二册), 汇编和记述了此前在中国发现的淡水蟹类1科2属13种(沈嘉瑞和戴爱云, 1964)。进入20世纪70年代以来, 随着全国范围的并殖吸虫流行病学调查工作广泛开展, 中国科学院动物研究所在戴爱云先生领导下成立了中国淡水蟹类研究课题组, 开展了全国性的淡水蟹类调查, 新种发现和系统分类研究逐渐升温。特别是90年代, 中国淡水蟹的新种发现达到一个空前的井喷期, 共发现和描述160个新种(图1)。至1999年, 戴爱云编著出版的《中国动物志》(束腹蟹科、溪蟹科)共记载中国淡水蟹类228种及亚种, 分隶2科35属。此后, 国内外专家又陆续发表了中国淡水蟹47新种(Naruse et al, 2008, 2013; Zou et al, 2008; Zhu et al, 2010; Do et al, 2016; Chu et al, 2017a, b; Huang et al, 2017; Ng, 2017; Huang, 2018)(图1)。

图1   中国淡水蟹新种记述年代分布图(1798-1899和2010-2018分别做1个单元统计)

Fig. 1   Statistics of the number of new species of China’s freshwater crabs per ten year (1798-1899 and 2010-2018 as a unit separately)

Cumberlidge等(2011)归纳了中国淡水蟹类2科37属243种。然而, 该数据未包括我国香港和台湾的淡水蟹类物种。Shih和Ng (2011)对东亚淡水蟹类多样性的研究, 汇总了中国淡水蟹类2科36属247种。但是, 该数据同样未包括台湾的淡水蟹类。

中国是世界上生物多样性最为丰富的12个国家之一, 也是北半球生物多样性最丰富的国家, 同时也是生物多样性受到严重威胁的国家之一(徐海根等, 2013)。与其他生物类群相比, 中国的淡水蟹类物种多样性居世界第一。然而, 迄今为止还没有一个系统的、涵盖全国范围的淡水蟹分类和分布名录。

本文在《中国动物志》(束腹蟹科、溪蟹科)的基础上, 汇总最新分类研究进展, 对中国淡水蟹的主要分类类群进行了系统梳理和物种分类厘定, 并在此基础上系统归纳和整理了各物种的调查和采样记录, 以省为操作单元, 汇编完成中国淡水蟹类物种分布名录, 旨在为今后的中国淡水蟹系统分类、物种多样性保护研究, 包括建立全国范围的淡水蟹物种红色名录等提供必要的基础数据, 为将来进一步开展全国范围的淡水蟹生物多样性本底评估和长期观测提供基础依据。

1 研究方法

收集截至2018年1月31日发表的有关中国淡水蟹类分类的研究文献, 在《中国动物志》(束腹蟹科、溪蟹科)(戴爱云, 1999)描述的淡水蟹类物种及其分类基础上, 增补了新发现和记述的属、种, 包括属、种重新划分及其分类地位的厘定。同时, 参照《中国动物志》(束腹蟹科、溪蟹科)记录的地理分布资料, 查阅其他有关中国淡水蟹生物多样性的调查报告、文献等资料, 并参考本课题组自2000年以来的野外调查记录, 形成中国淡水蟹分类和地理分布编目。在此基础上统计特有属和特有种的数量。以省(包括自治区、直辖市、特别行政区等)为操作单元, 依据整理的分布名录, 统计各省淡水蟹的属、种数。

2 结果和讨论

2.1 种类

系统梳理和汇总已记述的中国淡水蟹类物种, 共计311种和亚种, 隶属2科45属。区系组成以溪蟹科为主, 包括44属283种及亚种(附录1), 占总数的91%; 拟地蟹科仅1属, 已记述28种(占9%)。各科物种的详细分类与分布名录见附录1。在这些淡水蟹类群中, 38属为中国特有(附录1), 占总数的84%; 其余7属还分布于东南亚、南亚和东亚其他国家; 302种为中国特有(附录1), 特有种比例高达97%, 其余9种还见于缅甸、越南以及老挝等国。在所有已记述的45属中, 华溪蟹属(Sinopotamon Bott, 1967)的物种多样性最高, 已描述85种和亚种, 占总数的27.3%。其次是泽蟹属(Geothelphusa Stimpson, 1858), 已记述37种(占11.9%)。此外, 有17属是单型属, 占所有已记述属的37.8%。

2.2 分类讨论

继戴爱云(1999)出版《中国动物志》(束腹蟹科、溪蟹科)之后, 国内外已陆续建立和描述了弓肢溪蟹属(Arquatopotamon Chu, Zhou & Sun, 2017)等10个新属(包括未收入动物志的1属)。此外, 一些属种的分类地位业已被重新厘定。本文对这些新属及其属征等进行了归纳(附录2), 并对分类地位有调整、物种划分存在分类争议或同物异名的一些属, 如清溪蟹属(Candidiopotamon Bott, 1967)、华溪蟹属等4属进行了一一梳理和讨论。

2.2.1 弓肢溪蟹属

地理分布: 中国云南

模式种: 鸡足山弓肢溪蟹(Arquatopotamon jizushanense Chu, Zhou & Sun, 2017)

中国1种。

2.2.2 清溪蟹属(Candidiopotamon Bott, 1967)

地理分布: 中国台湾; 琉球群岛

模式种: 拉氏清溪蟹[Candidiopotamon rathbunae (De Man, 1914)]

全球4种, 中国1种。

分类讨论: 戴爱云(1999)记录清溪蟹属共包括2种, 拉氏清溪蟹[Candidiopotamon rathbunae (De Man, 1914)]和广东清溪蟹(Candidiopotamon guangdongense Dai, 1999)。其中, 广东清溪蟹是依据来自广东的1个雄性标本建立的新种。该新种与拉氏清溪蟹之间的形态差异主要表现为雄性腹部基部4节相对较宽, 第一腹肢相对较细瘦。成濑贯博士对广东清溪蟹的正模标本与拉氏清溪蟹的标本进行了比较观察, 认为广东清溪蟹的各形态测量值均落在拉氏清溪蟹对应形态测量值的范围之内, 二者之间并无显著的形态差异。并推测该模式标本很可能采于台湾地区(施习德, 2008)。在此之后, 在中国大陆再无广东清溪蟹的采集记录。因此本文认为, 该物种很可能是拉氏清溪蟹的次定同物异名。本名录仅收录拉氏清溪蟹1种。

2.2.3 粤溪蟹属(Cantopotamon Huang, Ahyong & Shih, 2017)

地理分布: 中国广东

模式种: 珠海粤溪蟹(Cantopotamon zhuhaiense Huang, Ahyong & Shih, 2017)

中国4种。

2.2.4 隐溪蟹属(Cryptopotamon Ng, 1992)

地理分布: 中国香港

模式种: 鳃刺隐溪蟹[Cryptopotamon anacoluthon (Kemp, 1918)]

中国1种。

2.2.5 地狱溪蟹属(Diyutamon Huang, Shih & Ng, 2017)

地理分布: 中国贵州

模式种: 蜡白地狱溪蟹(Diyutamon cereum Huang, Shih & Ng, 2017)

中国1种。

2.2.6 东方溪蟹属(Eosamon Yeo & Ng, 2007)——

溪蟹属(Potamon Savigny, 1816)

别名: 胖溪蟹

地理分布: 中国西南部; 泰国东北部; 越南南部

模式种: [Potamon (Potamon) smithianum Kemp, 1923]

全球10种, 中国3种。

分类讨论: Yeo和Ng (2007)建立东方溪蟹属, 将戴爱云(1999)记述的溪蟹属中的胖溪蟹指名亚种[Potamon tumidum tumidum (Wood-Mason, 1871)]、胖溪蟹泸水亚种(Potamon tumidum lushuiense Dai & Chen, 1985)和胖溪蟹腾冲亚种(Potamon tumidum tengchongense Dai & Chen, 1985)划分到此新属中, 将已记述的3个亚种提升为种, 即胖东方溪蟹[Eosamon tumidum (Wood-Mason, 1871)]、泸水东方溪蟹[Eosamon lushuiense (Dai & Chen, 1985)]和腾冲东方溪蟹[Eosamon tengchongense (Dai & Chen, 1985)]。

2.2.7 东风溪蟹属(Eurusamon Huang, 2018)

地理分布: 中国广东

模式种: 广东东风溪蟹(Eurusamon guangdongense Dai & Tüerkay, 1997)

中国1种。

2.2.8 泽蟹属(Geothelphusa Stimpson, 1858)

地理分布: 中国台湾; 日本本岛; 琉球群岛

模式种: Geothelphusa obtusipes Stimpson, 1858

全球50种, 中国37种。

分类讨论: Stimpson (1858)建立溪蟹属泽蟹亚属并收录2种, 包括钝足泽蟹[Potamon (Geothelphusa) obtusipes Stimpson, 1858]和韩氏泽蟹[Potamon (Geothelphusa) dehaani (White, 1847)]。Bott (1967, 1970)将泽蟹亚属提升为属, 并将该属特征限定为G1为细长的剑形, 第二腹肢沟开口朝向腹方, 且末节为锥形。并认为该属仅分布于我国台湾和日本。韩氏泽蟹由Adam White于1847年发表, 是日本最早的淡水蟹记录。沈嘉瑞(1932)报道了一采自山东省的韩氏泽蟹, 之后, 沈嘉瑞和戴爱云将韩氏泽蟹收录于《中国动物图谱: 甲壳动物》(第二册)中, 认为该物种分布于我国山东、江西、台湾, 以及日本。但是, 该记录在此之后并未得到进一步的证实(Shy et al, 1994)。由物种描绘图显示, 其头胸甲和G1形态与泽蟹属的任何已知物种都不一致, 其头胸甲和华溪蟹属的一些物种相似, 但是其G1细长且末端尖锐, 不像华溪蟹属的任何物种(Shy et al, 1994)。Bott (1967, 1970)在该物种的地理分布记述中也未收录山东和江西两地。德国明兴国家动物收藏馆(慕尼黑)保存有两件非日本产的韩氏泽蟹, 其中一件为Hans Sauter于1906年所采, 采集点记载为“Yentempo, China”, 经查该地名并非中国大陆地名, 而是台湾地区的盐埕埔(今高雄市盐埕区)。经成濑贯博士鉴定, 此标本与屏东泽蟹十分相似。另一件(1雄、1雌)标签记载采自山东青岛(Tsingtau, China), 经成濑贯博士鉴定确实为韩氏泽蟹。由于山东仅产平原华溪蟹, 二者极易分辨, 因此推测可能是标签放置错误, 韩氏泽蟹仅分布于日本(施习德, 2008)。至此, 可以认为, 中国大陆无泽蟹属物种分布。戴爱云(1999)所著《中国动物志》(溪蟹科、束腹蟹科)也未收录该种。因此, 本文未将韩氏泽蟹列入中国淡水蟹分类与分布名录。

2.2.9 中印溪蟹属(Indochinamon Yeo & Ng, 2007)

——溪蟹属(Potamon Savigny, 1816)

地理分布: 中国西南部; 缅甸; 泰国; 老挝; 越南; 印度东北部。

模式种: Potamon villosum Yeo & Ng, 1998

全球30种, 中国15种。

分类讨论: Yeo和Ng (2007)对溪蟹属(Potamon Savigny, 1816)进行了分类厘定, 将原有的溪蟹属物种划分到18个新属以及8个其他已有的属中; 并将戴爱云(1999)记述的溪蟹属15个种及亚种划分到中印溪蟹属; 此外, 将原有的毛足溪蟹两亚种, 毛足溪蟹剑川亚种[Potamon hispidum jianchuanense (Dai & Chen, 1985)]和保山亚种[Potamon hispidum boshanense (Dai & Chen, 1985)]分别提升为种, 并归隶于中印溪蟹属。同时, 认为河口溪蟹[Potamon hokuoense Tai, Song, He, Cao, Xu & Zhong, 1975]是坦南特中印溪蟹[Indochinamon tannanti (Rathbun, 1904)]的同物异名(Yeo & Ng, 1998, 2007)。至此, 更新后分布在中国的中印溪蟹属共15种。

2.2.10 微溪蟹属(Minutomon Huang, Mao & Huang, 2014)

地理分布: 中国广东

模式种: 汕尾微溪蟹(Minutomon shanweiense Huang, Mao & Huang, 2014)

中国1种。

2.2.11 南海溪蟹属(Nanhaipotamon Bott, 1968)

地理分布: 中国浙江南部、福建、广东、台湾

模式种: 台湾南海溪蟹[Geothelphusa formosanum (Parisi, 1916)]

中国16种。

分类讨论: 1968年Bott建立了南海溪蟹属, 包括台湾南海溪蟹[Nanhaipotamon formosanum formosanum (Parisi, 1916)](分布于台湾地区), N. formosanum globosum (Parisi, 1916)(分布于琉球群岛)和(N. balssi Bott, 1968)(分布于菲律宾)。之后, 戴爱云对南海溪蟹属进行了修订, 认为南海溪蟹属仅分布于广东、福建、浙江和台湾等地, 并发表南海溪蟹属9个新种、修订1个物种(Dai & Turkay, 1997)。其中, 和平南海溪蟹(Nanhaipotamon hepingense Dai, 1997)与平和南海溪蟹(Nanhaipotamon pinghense Dai, 1997)采集于同一地点(广东和平), 标本均为单一雄性正模。Shih和Ng (2011)对这两物种正模的16S rDNA序列分析显示, 二者序列无差异。对这两物种的形态特征比较认为, 两物种之间的差异可能为和平南海溪蟹的种内差异, 认为这两物种很可能为同一种。Huang等(2012)发现广东南海溪蟹存在种内的形态差异。因此, 综合以上分析, 本研究认为平和南海溪蟹是和平南海溪蟹的次定同物异名。Huang等(2012)和Lin等(2012)先后记述发表了南海溪蟹属两新种, 珠海南海溪蟹(Nanhaipotamon zhuhaiense Huang, Huang & Ng, 2012)和平潭南海溪蟹(Nanhaipotamon pingtanense Lin, Cheng & Chen, 2012)。至此, 南海溪蟹属包括16种(附录1)。

2.2.12 黔桂溪蟹属(Qianguimon Huang, 2018)

地理分布: 中国贵州、广西

模式种: 无鞭黔桂溪蟹[Qianguimon aflagellum (Dai, Song, Li & Liang, 1980)]

中国3种。

2.2.13 华溪蟹属(Sinopotamon Bott, 1967)

地理分布: 中国长江流域南、北各省区

模式种: [Potamon (Potamon) davidi Rathbun, 1904]

中国85种和亚种。

分类讨论: 该属是我国物种多样性最丰富的特有属(戴爱云, 1999; Cumberlidge et al, 2011; Fang et al, 2013), 已记述85种和亚种(Chu et al, 2017)。其地理分布范围横跨18省, 分布区域大多介于长江流域。戴爱云(1999)主要依据头胸甲、大螯和G1末节两叶的结构, 将华溪蟹属的物种分为4个种组, 另有大螯指节末端呈匙形的两个物种, 匙指华溪蟹(Sinopotamon cochlearidigitum Dai, Chen, Zhang & Lin, 1986)和凹指华溪蟹(Sinopotamon introdigitum Dai, Chen, Zhang & Lin, 1986)。

Ji等(2016)对华溪蟹属分子系统关系和多样性发生的研究提示, 该属内部形成两个分支, 其一为四川盆地及其外围山地的圆叶组, 其余则聚为另一支。其结果不支持基于雄性第一腹肢末节两叶形态划分的四个种组的分类安排。此后, Shih等(2016)将华溪蟹属限定到仅有12个物种, 以光泽华溪蟹为模式物种; 并建立1个新属, 龙溪蟹属(Longpotamon Shih, Huang & Ng, 2016), 将大多数过去曾认为隶属于华溪蟹属的物种均归置到该新属中。Shih等(2016)提出狭义华溪蟹属(Sinopotamons. str.)的属征为: 雄性腹部尾节侧缘明显凹陷, G1直, 超越腹锁突, 末节指向上方或外方; 雌性生殖孔大, 宽, 深, 抵达五六胸甲缝。龙溪蟹属的属征为: 雄性腹部尾节侧缘较少凹陷, G1较直, 未抵达腹锁突, 末节指向上方或内方; 雌性生殖孔较小, 浅, 未抵达第5/6胸甲缝。

对Shih等(2016)提出的两个分类群组的物种形态观察发现, 这种分类安排存在一些明显的缺陷。在狭义华溪蟹属包含的物种当中, 匙指华溪蟹和凹指华溪蟹虽然雄性第一腹肢符合给出的属征, 但是凹指华溪蟹雌性生殖孔未抵达第五六胸甲缝(戴爱云, 1999), 与此分类安排不符, 且这两物种的G1末节分别呈近长方形和豆瓣状, 该特征也与其他物种G1末节呈圆柱状的特征差异显著。该分类安排也没有注意到匙指华溪蟹和凹指华溪蟹所具有的独特的螯足指末端呈匙形特征。在龙溪蟹属包含的物种中, 河南华溪蟹(Sinopotamon honanense Dai, Song, He, Cao, Xu & Zhong, 1975)和小华溪蟹(Sinopotamon parvum Dai, Song, Li, Chen, Wang & Hu, 1985) G1均明显超越腹锁突(戴爱云, 1999), 并不符合该分类群定义的未抵达腹锁突的归类属征, 且多个物种其G1为抵达腹锁突, 如长安华溪蟹(Sinopotamon changanense Dai, 1999)和兰氏华溪蟹[Sinopotamon lansi (Doflein, 1902)]等。因此, 该分类体系仍有待形态学和分子系统学研究的进一步检验。

值得注意的是, 本实验室周丽君(2017) (① 周丽君 (2017) 基于DNA条形码探讨中国的近溪蟹亚科淡水蟹类系统发生与物种界定. 硕士学位论文, 南京师范大学, 南京.)联合两条线粒体基因和两条核基因标记, 重建中国的近溪蟹亚科属种间系统发生关系, 认为狭义华溪蟹属物种(取样8种)在分子系统树上聚为一支, 并与浅胸溪蟹属(Vadosapotamon Dai & Tüerkay, 1997)形成单系群; 小华溪蟹与纺锤溪蟹属(Acartiapotamon Dai, 1999)构成1个单系群; 螯指末端匙指形的保康华溪蟹(Sinopotamon baokangense Chu, Sun & Sun, 2017)与宽胸溪蟹属(Latopotamon Dai & Tüerkay, 1997)关系较近; 其余的华溪蟹属物种(取样58种及亚种)构成1个单系类群。小华溪蟹在形态上与龙溪蟹属特征不符, 在分子系统树上形成一个单独分支, 因此不支持将小华溪蟹归置于龙溪蟹属的分类安排。本文认为对于华溪蟹属的分类安排仍需要结合形态和分子证据分析来进一步探讨。因此, 本研究仍沿用戴爱云(1999)提出的华溪蟹属分类系统。

华溪蟹属中还存在疑难种, 如挂墩华溪蟹[S. koatenense (Rathbun, 1904)]。该物种的模式标本不全、描述不清。Rathbun (1904)发表新种挂墩溪蟹(Potamon koatenense sp. nov.), 记录的模式标本为一只雌性个体, 并仅对其头胸甲、腹部、大螯、步足等进行了描述, 但图例仅绘制了大螯和第三颚足(引自Rathbun, 1904: P308, Fig. 35)。有关该物种雄性第一腹肢性状的所有信息均缺失。其模式产地记录为福建挂墩, 栖息地海拔约为1,200 m。Bott (1967)将挂墩溪蟹归为锯齿华溪蟹(Sinopotamon denticulatum (H. Milne-Edwards, 1853)(戴爱云和陈国孝, 1979)。戴爱云和陈国孝(1979)认为, Rathbun (1904)采自福建挂墩的标本与Bott (1967; 1970)所记述的福建福州的华溪蟹以及历次在福建各地所采集的标本应为新种福建华溪蟹(Sinopotamon fukienense sp. nov., Dai & Chen, 1979), 而不是之前认定的锯齿华溪蟹。戴爱云(1999)在《中国动物志》(束腹蟹科、溪蟹科)未收录挂墩华溪蟹。但Ng等(2008)将其收录于《短尾类系统(第一部分): 一个有注释的全球现生短尾类名录》之中, 同时也收录了福建华溪蟹。综合以上, 并考虑模式标本的完整性, 本文认为挂墩华溪蟹为福建华溪蟹的同种异名, 未予收录。

2.2.14 粤北溪蟹属(Yuebeipotamon Huang, Shih & Mao, 2016)

地理分布: 中国广东

模式种: 灰岩粤北溪蟹(Yuebeipotamon calciatile Huang, Shih & Mao, 2016)

中国1种。

2.3 地理分布

本文以省为操作单元对中国淡水蟹类地理分布的分析显示, 在全国有淡水蟹类分布的24个省(市、自治区)中, 云南的物种多样性最高, 已报道16属50种; 其次为台湾(4属41种), 之后依次为广西(13属37种), 福建(6属34种)和江西(4属33种)(表1, 附录1)。总体来看, 中国淡水蟹类物种多样性的地理分布, 除多样性最高的云南省以外, 主要集中在长江流域及其以南各省, 流域以北则多样性较低,

仅有个别种类其分布区可拓展至黄河流域及其以北(表1)。而我国广大的高、寒、旱地区, 包括除藏东南(主要是墨脱)的西藏大部、青海、新疆、内蒙古、宁夏、辽宁、吉林和黑龙江等地则无淡水蟹类分布。淡水蟹物种多样性在我国的地理分布与其择淡水而居、喜湿暖的生活习性相吻合。

表1   中国各省区的淡水蟹物种多样性分布情况

Table 1   Species diversity of freshwater crabs in each provincial region of China

拟地蟹科Gecarcinucidae溪蟹科
Potamidae
合计
Total
属/种数
No. of genus/
species
属/种数
No. of genus/ species
科/属/种数
No. of family/
genus/species
云南 Yunnan1/215/482/16/50
台湾 Taiwan1/13/402/4/41
广西 Guangxi1/712/302/13/37
福建 Fujian1/35/312/6/34
江西 Jiangxi1/63/272/4/33
湖北 Hubei4/301/4/30
贵州 Guizhou13/291/13/29
广东 Guangdong1/38/172/9/20
湖南 Hunan4/251/4/25
四川 Sichuan5/211/5/21
海南 Hainan1/43/102/4/14
重庆 Chongqing3/121/3/12
浙江 Zhejiang3/101/3/10
河南 Henan2/91/2/9
安徽 Anhui1/71/1/7
香港 Hongkong1/22/32/3/5
陕西 Shaanxi2/51/2/5
河北 Hebei1/31/1/3
山西 Shanxi1/31/1/3
甘肃 Gansu1/21/1/2
江苏 Jiangsu1/21/1/2
澳门 Macao1/11/1/1
山东 Shandong1/11/1/1
西藏 Xizang1/11/1/1

新窗口打开

岛屿物种多样性则以台湾岛较高, 除物种多样性最高的泽蟹属(已记述37种), 还见有南海溪蟹属2种, 清溪蟹属1种, 以及拟地蟹科的束腰蟹属1种。其中, 南海溪蟹属和束腰蟹属为大陆和台湾岛共有。相比之下, 海南岛的淡水蟹物种多样性不高, 仅2科4属14种和亚种。但分布在海南岛的溪蟹科属、种特有性极高, 已记述的3属10种(和亚种)都为当地特有(附录1); 而拟地蟹科束腰蟹属的物种多样性相较台湾岛高, 已记述的4种也均为海南岛特有。

自《中国动物志》(束腹蟹科、溪蟹科)(戴爱云, 1999)出版至今, 已记述9新属和47新种(截至2018年1月; 附录1, 图1)。可以说, 当今中国淡水蟹分类和系统学研究仍处在一个持续的新种发现阶段。从这些最近发表的分类单元在地理分布上的特点来看, 新属种主要发现于福建(4属12种)、广西(6属9种)、台湾(2属9种)、广东(6属8种)和云南(3属4种)。其中值得注意的是, 陈国孝和张春光(2002) (①陈国孝, 张春光 (2002) 广西天坑溶洞中国溪蟹新种记述. 见: 庆祝中国甲壳动物协会成立20周年并恭祝协会主席刘瑞玉院士成功进行55年的海洋研究. 中国甲壳动物学会和海洋研究所, 中国科学院, 青岛.)首次以会议摘要报道了采自广西乐业县大石围天坑底部的淡水蟹新种: 天坑中国溪蟹(Chinapotamon tiankengense sp. nov)。这项工作揭开了中国喀斯特地貌地下溶洞淡水蟹分类研究的序幕, 尽管此后该新种并未正式发表。直至2017年, Huang等首次报道了采自贵州安龙县天坑的一个新属种: 蜡白地狱溪蟹(Diyutamon cereum Huang, Shih &Ng, 2017)(Huang et al, 2017)。同年, Ng发表了采自广西凌云县岩流天坑和乐业县大石围天坑的两新种, 克拉克中国溪蟹(Chinapotamon clarkeiNg, 2017)和大石围中国溪蟹(Chinapotamon dashiweiNg, 2017)。并认为其中的大石围中国溪蟹很可能就是未正式发表的天坑中国溪蟹(Ng, 2017)。

尽管中国已然是全球淡水蟹物种多样性最高的国家, 已描述的物种数(45属311种)与整个新热带界的物种总数相当(46属320种; Peter K. L. Ng, 2018, 会议交流)。但是, 根据我们野外调查掌握的情况, 可以认为这些已知的物种多样性仍然被低估了。一些此前野外调查工作比较薄弱, 或极少受到关注、甚至尚未涉足的地区, 包括地处青藏高原东南部的横断山区, 以及西南喀斯特地貌地区水资源丰富的地下溶洞等特殊生境, 亟待开展深入的物种多样性本底调查。可以预见, 未来在这些地区将有许多新种或新属等类群的发现和报道。据估计, 中国淡水蟹类的物种数将达到400种(Peter K. L. Ng, 2018, 会议交流)。

附录 Supplementary Material

附录1 中国淡水蟹分类与分布名录

Appendix 1 A checklist on the classification and distribution of the freshwater crabs in China

http://www.biodiversity-science.net/fileup/PDF/2018062-1.pdf

附录2 中国淡水蟹分类与分布名录中14个属的属征

Appendix 2 The diagnosis of fourteen genera in the checklist

http://www.biodiversity-science.net/fileup/PDF/2018062-2.pdf

致谢:新加坡国立大学Peter K. L. Ng教授对本文初稿提出宝贵的建设性修改意见; 美国北密歇根大学Neil Cumberlidge 教授帮助润色英文摘要; 南京师范大学生命科学学院高伟副教授、孙玉芳博士、方芳博士、殷稼雯博士、纪永坤博士, 硕士研究生王光跃、朱琳、徐娟娟、潘达、贺姹、宋丹红、王玉娟等参与部分野外调查和标本采集工作。在此谨致谢忱!

作者声明没有竞争性利益冲突.


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Freshwater ecosystems in the tropics host a diverse endemic fauna including freshwater crabs, but the rapid loss and deterioration of habitat means that many species are now under imminent threat. Studies on freshwater fish and amphibians suggest a third to half of the species in some tropical freshwaters is either extinct or endangered, but the status of the freshwater crabs is not known. Freshwater crabs, with 1280 species, represent one-fifth of all the World鈥檚 brachyurans. We therefore undertook a comprehensive IUCN Red List assessment of the freshwater crabs, which was the first time that such a study had been attempted on a global scale for any group of freshwater invertebrates. The conservation status of all known species from the Americas, Africa, Europe, Asia, and Australasia revealed unexpectedly high threat levels. Here we show that about one-sixth of all freshwater crab species have an elevated risk of extinction, only one-third are not at-risk, and although none are actually extinct, almost half are too poorly known to assess. Out of 122 countries that have populations of freshwater crabs, 43 have species in need of protection. The majority of threatened species are restricted-range semi-terrestrial endemics living in habitats subjected to deforestation, alteration of drainage patterns, and pollution. This is illustrated with a case study of one such species found in Singapore. This underlines the need to prioritize and develop conservation measures before species decline to levels from which they cannot recover. The proportion of freshwater crabs threatened with extinction is equal to that of reef-building corals, and exceeds that of all other groups that have been assessed except for amphibians. These results represent a baseline that can be used to design strategies to save the World鈥檚 threatened freshwater crab species.
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. Integrative Zoology, 6, 45-55.

https://doi.org/10.1111/j.1749-4877.2010.00228.x      URL      PMID: 21392361      [本文引用: 2]      摘要

Abstract China lies at the heart of the global center of freshwater crab diversity in tropical Asia, where the 2 most diverse families occur: Potamidae (505 species, 95 genera) and Gecarcinucidae (344 species, 59 genera). China stands out as the country with the highest species richness of freshwater crabs globally. Its fauna comprises 243 species in 37 genera and in 2 families, and species discovery is still progressing at a rapid pace. The vast majority of the species are distributed in southwest, south central and eastern China in the Oriental zoogeographical region. China also stands out as having a highly endemic freshwater crab fauna at the species level (96%) and at the genus level (78%). Although the recent International Union for the Conservation of Nature (IUCN) red list conservation assessment found only 6 out of 228 species (2%) to be threatened (5 potamids and 1 gecarcinucid), the majority (more than 75%) of Chinese species are regarded as data deficient, so the number of threatened species is likely to be a serious underestimate. Threats from increasing habitat destruction and pollution are a major concern due to the rapidly growing economy and massive developments taking place in China. There is therefore an urgent need for increased species exploration and for the development of a conservation strategy for China's threatened (and potentially threatened) endemic freshwater crab species. 漏 2011 ISZS, Blackwell Publishing and IOZ/CAS.
[8] Dai AY (1999)

Fauna Sinica: Arthropoda: Crustacea: Malacostraca: Decapoda: Parathelphusidae, Potamidae

. Science Press, Beijing, 501 p, 238 figs, 30 pls. (in Chinese with English summary)

URL      [本文引用: 9]     

[戴爱云 (1999)

中国动物志节肢动物门甲壳动物亚门软甲纲十足目束腹蟹科溪蟹科

. 科学出版社, 北京.]

URL      [本文引用: 9]     

[9] Dai AY, Turkay M (1997)

Revision of the Chinese freshwater crabs previously placed in the genus Isolapotamon Bott, 1968 (Crustacea: Decapoda: Brachyura: Potamidae)

. Raffles Bulletin of Zoology, 45, 237-264.

URL      [本文引用: 6]      摘要

Abstract The taxonomy of the Chinese freshwater crab species previously assigned to the genus Isolapotamon Bott, 1966 (Potamidae) is revised. Isolapotamon is now restricted to taxa from Southeast Asia. The nine Chinese species are here referred to five new genera, viz. Neilupotamon, Yarepotamon, Minpotamon, Vadosapotamon and Latopotamon. Two new Chinese species are also described, Neilupotamon xinganense and Yarepotamon guangdongense.
[10] Dai AY, Chen GX (1979)

The investigation of freshwater crabs in Fujian Province

. Current Zoology, 25, 243-248. (in Chinese with English abstract)

[本文引用: 2]      摘要

[戴爱云, 陈国孝 (1979)

福建省淡水蟹类的调查研究

. 动物学报, 25, 243-248.]

[本文引用: 2]      摘要

[11] Daniels SR, Phiri EE, Klaus S, Albrecht C, Cumberlidge N (2015)

Multilocus phylogeny of the afrotropical freshwater crab fauna reveals historical drainage connectivity and transoceanic dispersal since the Eocene

. Systematic Biology, 64, 549-567.

https://doi.org/10.1093/sysbio/syv011      URL      PMID: 25649930      [本文引用: 1]      摘要

Phylogenetic reconstruction, divergence time estimations and ancestral range estimation were undertaken for 66% of the Afrotropical freshwater crab fauna (Potamonautidae) based on four partial DNA loci (12S rRNA, 16S rRNA, cytochrome oxidase one [COI], and histone 3). The present study represents the most comprehensive taxonomic sampling of any freshwater crab family globally, and explores the impact of paleodrainage interconnectivity on cladogenesis among freshwater crabs. Phylogenetic analyses of the total evidence data using maximum-likelihood (ML), maximum parsimony (MP), and Bayesian inference (BI) produced a robust statistically well-supported tree topology that reaffirmed the monophyly of the Afrotropical freshwater crab fauna. The estimated divergence times suggest that the Afrotropical Potamonautidae diverged during the Eocene. Cladogenesis within and among several genera occurred predominantly during the Miocene, which was associated with major tectonic and climatic ameliorations throughout the region. Paleodrainage connectivity was observed with specimens from the Nilo-Sudan and East African coast proving to be sister to specimens from the Upper Guinea Forests in West Africa. In addition, we observed strong sister taxon affinity between specimens from East Africa and the Congo basin, including specimens from Lake Tanganyika, while the southern African fauna was retrieved as sister to the Angolan taxa. Within the East African clade we observed two independent transoceanic dispersal events, one to the Seychelles Archipelago and a second to Madagascar, while we observe a single transoceanic dispersal event from West Africa to S茫o Tom茅. The ancestral area estimation suggested a West African/East African ancestral range for the family with multiple dispersal events between southern Africa and East Africa, and between East Africa and Central Africa The taxonomic implications of our results are discussed in light of the widespread paraphyly evident among a number of genera.
[12] Do VT, Shih HT, Huang C (2016)

A new species of freshwater crab of the genus Tiwaripotamon Bott, 1970 (Crustacea, Brachyura, Potamidae) from northern Vietnam and southern China

. Raffles Bulletin of Zoology, 64, 213-219.

URL      [本文引用: 1]      摘要

Abstract A new freshwater crab species of the family Potamidae is described from the boundaries of northern Vietnam and southern China. Tiwaripotamon pluviosum sp. nov. can be distinguished from other species by a suite of morphological characters, including a relatively flat carapace, relatively less slender legs, and distinct dorsal flaps on the male first gonopods. Molecular data using the mitochondrial cytochrome oxidase subunit I (COI) also supports this species as being new.
[13] Fang F, Sun HY, Zhao Q, Lin CT, Sun YF, Gao W, Xu JJ, Zhou JY, Ge F, Liu NF (2013)

Patterns of diversity, areas of endemism, and multiple glacial refuges for freshwater crabs of the genus Sinopotamon in China (Decapoda: Brachyura: Potamidae)

. PLoS ONE, 8, e53143.

https://doi.org/10.1371/journal.pone.0053143      URL      PMID: 3537761      [本文引用: 1]      摘要

Abstract Previous research has shown that the geographical distribution patterns of freshwater fishes and amphibians have been influenced by past climatic oscillations in China resulting from Pleistocene glacial activity. However, it remains unknown how these past changes have impacted the present-day distribution of Chinese freshwater crabs. This work describes the diversity and endemism of freshwater crabs belonging to Sinopotamon, a highly speciose genus endemic to China, and evaluates its distribution in terms of topography and past climatic fluctuations. Species diversity within Sinopotamon was found to be concentrated in an area from the northeastern edge of the Yunnan-Guizhou Plateau to the Jiangnan Hills, and three areas of endemism were identified. Multiple regression analysis between current climatic variables and Sinopotamon diversity suggested that regional annual precipitation, minimum temperature in the coldest month, and annual temperature range significantly influenced species diversity and may explain the diversity patterns of Sinopotamon. A comparison of ecological niche models (ENMs) between current conditions and the last glacial maximum (LGM) showed that suitable habitat for Sinopotamon in China severely contracted during the LGM. The coincidence of ENMs and the areas of endemism indicated that southeast of the Daba Mountains, and central and southeastern China, are potential Pleistocene refuges for Sinopotamon. The presence of multiple Pleistocene refuges within the range of this genus could further promote inter- and intraspecific differentiations, and may have led to high Sinopotamon species diversity, a high endemism rate and widespread distribution.
[14] Huang C (2018)

Revision of Yarepotamon Dai & Türkay, 1997 (Brachyura: Potamidae), freshwater crabs endemic to southern China, with descriptions of two new genera and four new species

. Journal of Crustacean Biology, 38, 173-189.

https://doi.org/10.1093/jcbiol/rux120      URL      [本文引用: 3]     

[15] Huang C, Shih HT, Ng PKL (2017)

A new genus and new species of Potamidea (Crustacea: Decapoda: Brachyura: Potamoidae), the first stygomorphic cave crab known from China and East Asia

. Zootaxa, 4232, 71-84.

https://doi.org/10.11646/zootaxa.4232.1.5      URL      PMID: 28264380      [本文引用: 7]      摘要

A new genus and species of freshwater crab, Diyutamon cereum n. gen., n. sp., is described from a cave in Guizhou, China. This is the first record of a true stygomorphic crab from China and East Asia, possessing pale body coloration, strongly reduced eyes, and long ambulatory legs. While superficially similar to Chinapotamon Dai & Naiyanetr, 1994, and Tiwaripotamon Bott, 1970, the new genus possesses a diagnostic combination of carapace, ambulatory leg, thoracic sternal, and male abdominal characters that easily distinguishes it from other genera. Molecular data derived from the mitochondrial 16S rDNA supports the establishment of the new genus.
[16] Ji YK, Sun YF, Gao W, Chu KL, Wang RC, Zhao Q, Sun HY (2016)

Out of the Sichuan Basin: Rapid species diversification of the freshwater crabs in Sinopotamon (Decapoda: Brachyura: Potamidae) endemic to China

. Molecular Phylogenetics and Evolution, 100, 80-94.

https://doi.org/10.1016/j.ympev.2016.04.003      URL      PMID: 27058122      摘要

Abstract Sinopotamon Bott, 1967 is the most speciose and widely distributed freshwater crab genus in East Asia. Our extensive sampling includes about 76% of the known Sinopotamon taxa, and nearly covers its entire distribution area. Based on mitochondrial cytochrome oxidase I (COI) and 16S rRNA, as well as nuclear 28S rRNA and histone H3, we reconstructed the Sinopotamon phylogeny using maximum likelihood and Bayesian approaches. The divergence time was estimated and multiple methods were used to conduct diversification analyses. The ancestral geographic distribution and character state were reconstructed. Three main clades (Clades I, II and III) that roughly correspond to their main geographic distribution ranges were recovered. Our results challenge the current view of the four major species groups based on the morphological differences in the male first gonopod (G1). The most recent common ancestor of Sinopotamon most likely originated from the Sichuan Basin and surrounding mountains (SBSM) and subsequently dispersed throughout central and eastern China. The exceptionally rapid, recent diversification was detected in Clade II. The high incidence of species-level non-monophyly found in Clade II can be explained by recent rapid radiation. Climatic changes, morphological innovations, range expansion and geographical heterogeneity may all contribute to the diversification in Sinopotamon. This study contributes to our knowledge on diversification of freshwater benthic macro-invertebrates in the East Asian inland ecosystem. Copyright 脗漏 2016 Elsevier Inc. All rights reserved.
[17] Lin GH, Cheng YZ, Chen SH (2012)

A new species of the genus Nanhaipotamon (Decapoda: Potamidae) from China

. Chinese Journal of Parasitology & Parasitic Diseases, 30, 434-437. (in Chinese with English abstract)

https://doi.org/10.3321/j.issn:0438-0479.2003.05.032      URL      [本文引用: 1]      摘要

记述了采自福建省武平县的淡水蟹类南海属Nanhaipotamon一新种武平南海溪蟹N.wupingensis sp.nov.本新种头胸甲显著隆起,雄性第1腹肢末部宽大,内侧呈半圆形扩张,外末角呈指状突出,末缘中部明显隆突.蟹体并殖吸虫囊蚴感染率27.3%(3/11).

[林国华, 程由注, 陈韶红 (2012)

南海溪蟹属一新种记述 (十足目: 溪蟹科)

. 中国寄生虫学与寄生虫病杂志, 30, 434-437.]

https://doi.org/10.3321/j.issn:0438-0479.2003.05.032      URL      [本文引用: 1]      摘要

记述了采自福建省武平县的淡水蟹类南海属Nanhaipotamon一新种武平南海溪蟹N.wupingensis sp.nov.本新种头胸甲显著隆起,雄性第1腹肢末部宽大,内侧呈半圆形扩张,外末角呈指状突出,末缘中部明显隆突.蟹体并殖吸虫囊蚴感染率27.3%(3/11).
[18] Miline Edwards H (1853)

Mémoire sur la famille des Ocypodides. Annales des Sciences Naturelles,

Series 3 (Zoology), 20, 163-228. (in French)

[本文引用: 2]     

[19] Naruse T, Yeo DCJ, Zhou XM (2008)

Five new species of freshwater crabs (Crustacea: Decapoda: Brachyura: Potamidae) from China

. Zootaxa, 1812, 49-68.

https://doi.org/10.5281/zenodo.182785      URL      [本文引用: 1]      摘要

Two species of Latopotamon Dai & Türkay, 1997, one species of Trichopotamon Dai & Chen, 1985, all from Yunnan Province, China, and two species of Sinopotamon Bott, 1967, from Hu’nan Province, China, are described as new. The new species are compared with the most similar congeners. This study brings the number of species of Latopotamon to three, Sinopotamon to 81, and Trichopotamon to two.
[20] Naruse T, Zhu C, Zhou XM (2013)

Two new species of freshwater crabs of the genus Heterochelamon Tüerkay & Dai, 1997 (Crustacea: Decapoda: Brachyura: Potamidae) from Guangxi Zhuang Autonomous Region, southern China

. Zootaxa, 3647, 567-576.

https://doi.org/10.11646/zootaxa.3647.4      URL      [本文引用: 1]     

[21] Ng PKL (2017)

Descriptions of two new cavernicolous species of Chinapotamon Dai & Naiyanetr, 1994 (Crustacea: Brachyura: Potamidae) from China

. Crustacean Research, 46, 1-16.

https://doi.org/10.18353/crustacea.46.0_1      URL      [本文引用: 6]     

[22] Ng PKL, Guinot D, Davie PJF (2008)

Systema Brachyurorum. Part I. An annotated checklist of extant Brachyuran crabs of the world

. Raffles Bulletin of Zoology, 17, 1-286.

URL      [本文引用: 1]      摘要

This is a title only record which contains no abstract. Please see the bibliographic details to the right.
[23] Rathbun MJ (1904)

Decapod crustaceans of the northwest coast of North America. Smithsonian Institution

.

[本文引用: 5]     

[24] Shen CJ (1932)

The Brachyura Crustacea of North China

. Zoologis Sinica, 9, 1-300.

URL     

[25] Shen CJ (1940)

The brachyuran fauna of Hong Kong

. Journal of the Hong Kong Fisheries Research Station, 1, 211-242.

[本文引用: 1]     

[26] Shen CJ, Dai AY (1964)

Chinese Animal Map: Crustacea

. Science Press, Beijing. (in Chinese)

[本文引用: 1]      摘要

[沈嘉瑞, 戴爱云 (1964)

中国动物图谱: 甲壳动物(第二册)

. 科学出版社, 北京.]

[本文引用: 1]      摘要

[27] Shih HT (2008)

Diversity of the freshwater crabs from the Ryukyus and Japan

. Wetlands Taiwan, 68, 1-23. (in Chinese)

[本文引用: 2]     

[施习德 (2008)

琉球与日本淡水蟹多样性

. 台湾湿地, 68, 1-23.]

[本文引用: 2]     

[28] Shih HT, Huang C, Ng PKL (2016)

A re-appraisal of the widely-distributed freshwater crab genus Sinopotamon Bott, 1967, from China, with establishment of a new genus (Crustacea: Decapoda: Potamidae)

. Zootaxa, 4138, 309-331.

https://doi.org/10.11646/zootaxa.4138.2.5      URL      PMID: 27470766      [本文引用: 3]      摘要

Freshwater crabs of the genus Sinopotamon Bott, 1967 (family Potamidae) are widely distributed along the Yangtze River (= Chang Jiang) drainage and are endemic to China. Two distinct clades can be distinguished within Sinopotamon s. lato. on the basis of morphological and molecular data. One clade corresponds to Sinopotamon s. str., with the type species Potamon (Potamon) davidi Rathbun, 1904, and 11 other species, all which occur in the Sichuan Basin (including Sichuan Province and Chongqing City) and reach the border areas of adjacent Shaanxi, Hubei, and Guizhou provinces. A new genus, Longpotamon gen. nov., is proposed for the second clade, with Sinopotamon exiguum Dai, 1997, designated as the type species. Sinopotamon s. str. can be distinguished from Longpotamon gen. nov. by the shape of the male telson and by characters of the male first gonopod and the female vulvae. These differences are supported by the mitochondrial 16S rDNA and cytochrome oxidase subunit I (COI) genetic data. Longpotamon gen. nov. is the largest clade, with 73 known species and a wide distribution along the Yangtze River drainage extending north to the Yellow River drainage and south to the eastern side of Wuyishan Range. The two genera overlap in the Sichuan Basin and the adjacent provinces.
[29] Shih HT, Ng PKL (2011)

Diversity and biogeography of freshwater crabs (Crustacea: Brachyura: Potamidae, Gecarcinucidae) from East Asia

. Systematics and Biodiversity, 9, 1-16.

https://doi.org/10.1080/14772000.2011.554457      URL      摘要

The diversity and biogeography of the two families of freshwater crabs in East Asia (China, Taiwan, Ryukyus and mainland Japan) were studied. The richness in different areas, as well as the distributions of all 40 genera and 311 species were analysed, the patterns examined and possible mechanisms discussed. The published data of freshwater crab species and their distributions in East Asia were analysed by using clustering, diversity index and graphical methods. Six biogeographical districts were recognized for the East Asian freshwater crabs based on similarity of distribution: (I) Hengduanshan Area, including Yunnan and Tibet; (II) Karst Area of Guizhou; (III) Yangtze River Basin, extending to Yellow River basin, with three subdivisions; (IV) Wuyishan Area and Pearl River Basin in Southeast and South China; (V) Hainan Island; and (VI) East Asian Islands, with subdivisions of Taiwan, Ryukyus and mainland Japan. The most diverse genera are the potamids Sinopotamon (84 species) and Geothelphusa (54 species), as well as the gecarcinucid Somanniathelphusa (27 species). Yunnan has the highest species richness (48 species) and diversity (Shannon index 2.21) in continental China, while Taiwan has the highest species richness (42 species) of the island systems. The distribution of the species of the potamid Sinopotamon and other genera along China''s longest drainage, the Yangtze River, can be subdivided into several zones corresponding to the upper, middle and lower reaches of the river basin. The freshwater crab fauna of continental China, the East Asian islands and Hainan Island were all different from each other, and this finding agreed with the findings of molecular phylogenetic studies. The distribution of freshwater crabs in the Yangtze River showed a similar pattern with other freshwater organisms in this drainage. The present biogeographical interpretation contrasts sharply with the traditional zoogeographical patterns proposed that are based on Chinese terrestrial vertebrates. The present analyses of crab distributions suggest that Yunnan is a possible centre of origin for the Potamidae of China and perhaps the whole of East Asia. The freshwater crab species richness in Yunnan is probably the result of its generally warmer climate, more diverse habitats and a long history of cladogenesis.
[30] Shy JY, Ng PKL, Yu HP (1994)

Crabs of the genus Geothelphusa Stimpson, 1858 (Crustacea, Decapoda, Brachyura, Potamidae) from Taiwan, with descriptions of 25 new species

. Raffles Bulletin of Zoology, 42, 781-846.

https://doi.org/10.1002/cne.903500411      URL      [本文引用: 2]      摘要

Twenty-eight potamid crabs of the genus Geothelphusa are reported from Taiwan. Of these, 25 are described as new, most of which have restricted distributions and occur in relatively low altitudes (less than 1000 m above sea level). Of the new species, only G. olea has a relatively wide distribution in western Taiwan, while G. eurysoma, G. monticola and G. takuan are found only in altitudes between 1000 to 2000 m above sea level.
[31] Stimpson W (1858)

Prodromus descriptionis animalium evertebratorum quoe in Expeditione ad Oceanum Pacificum eptentrionalem a Republica Federata Missa, Cadwaladaro Ringgold et Johann Rodgers Ducibus, observavit et descripsit. Part V. Crustacea Ocypodoidea

. Proceedings of the Academy of Natural Sciences of Philadelphia, 9, 93-110.

[本文引用: 2]     

[32] Wu HW (1934)

Enumeration of the river-crabs (Potamonidae) of China, with descriptions of three new species

. Sinensia, 4, 338-352.

[本文引用: 3]     

[33] Xu HG, Cao MC, Wu J, Ding H, Lei JC, Wu Y, Le ZF, Wang Z, Chen L, Cui P (2013)

An Assessment Report of County level Biodiversity in China

. Science Press, Beijing. (in Chinese)

URL      [本文引用: 1]      摘要

本书介绍了在我国首次系统采集的基于县级行政区域的物种分布数据库, 详细分析了中国野生微管植物、哺乳动物、鸟类、爬行动物、两栖动物和鱼类的现状、空间分布特征及主要威胁因素, 明确了影响野生微管植物和脊椎动物分布的主要因素, 识别了生物多样性保护空缺, 提出了有针对性的对策建议, 并配有大量物种空间分布图。

[徐海根, 曹铭昌, 吴军, 丁晖, 雷军成, 吴翼, 乐志芳, 王智, 陈练, 崔鹏 (2013)

中国生物多样性本底评估报告

. 科学出版社, 北京.]

URL      [本文引用: 1]      摘要

本书介绍了在我国首次系统采集的基于县级行政区域的物种分布数据库, 详细分析了中国野生微管植物、哺乳动物、鸟类、爬行动物、两栖动物和鱼类的现状、空间分布特征及主要威胁因素, 明确了影响野生微管植物和脊椎动物分布的主要因素, 识别了生物多样性保护空缺, 提出了有针对性的对策建议, 并配有大量物种空间分布图。
[34] Yeo DCJ, Ng PKL (1998)

Freshwater crabs of the Potamon tannanti species group (Crustacea: Decapoda: Brachyura: Potamidae) from northern Indochina

. Raffles Bulletin of Zoology, 46, 627-650.

URL      [本文引用: 1]      摘要

Several species of potamid crabs with aquatic habits have been confused with Potamon tannanti Rathbun, 1904. The present study separates P. tannanti s. str., from these congeners, some of which occur in the southern Chinese province of Yunnan as well, by using carapace, gonopodal and male telson characters. Potamon tannanti is redescribed; P. orleansi Rathbun, 1904, a species previously synonymised under P. tannanti is resurrected; and four new species are described, viz., P. cua, new species, P. guttus, new species, P. ou, new species, and P. villosum, new species. An artificial key to these species is included.
[35] Yeo DCJ, Ng PKL (2007)

On the genus “Potamon” and allies in Indochina (Crustacea: Decapoda: Brachyura: Potamidae)

. Raffles Bulletin of Zoology, 16(Suppl.), 273-308.

https://doi.org/10.1163/156854069X00538      URL      [本文引用: 3]      摘要

ABSTRACT The generic placements of species that have been previously classified in the genus Potamon sensu lato from Indochina and adjacent areas are revised. The result is that 91 former "Potamon" species and their allies are re-assigned to eight known genera (Acanthopotamon Kemp, [Potamiscinae]). Diagnoses are provided for these 18 new genera and comparisons with allied taxa made.
[36] Zhu CC, Naruse T, Zhou XM (2010)

Two new species of freshwater crabs of the genus Sinolapotamon Tai & Sung, 1975 (Decapoda, Brachyura, Potamidae) from Guangxi Zhuang Autonomous Region, China

. Crustaceana, 83, 245-256.

https://doi.org/10.1163/001121609X12603430877199      URL      [本文引用: 1]     

[37] Zou JX, Naruse T, Zhou XM (2008)

On a new species of freshwater crab of the genus Sinopotamon (Decapoda, Brachyura, Potamidae) from Wuyi Mountain, southeastern China

. Crustaceana, 81, 1381-1387.

https://doi.org/10.1163/156854008X361076      URL      [本文引用: 1]     

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