請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/47717
標題: | 東亞地區股窗蟹(甲殼類:十足目:毛帶蟹科)之
多樣性,系統分類及親緣關係研究 Diversity, systematics and phylogeny of sand-bubbler crabs Scopimera (Crustacea: Decapoda: Dotillidae) in East Asian waters |
作者: | Kingsley Jin-Ho Wong 王展豪 |
指導教授: | 陳國勤(Benny K. K. Chan) |
關鍵字: | 股窗蟹,多樣性,分類,生物地理,親緣關係, Scopimera,biodiversity,taxonomy,biogeography,phylogeny, |
出版年 : | 2010 |
學位: | 碩士 |
摘要: | Crabs of the genus Scopimera De Haan, 1833, commonly known as sand-bubbler crabs, are abundant on sandy shores of the Indo-West Pacific region. Taxonomy of Scopimera in the Indo-West Pacific region was confused and one of the issues centered on the identity of S. globosa De Haan, 1835 and S. tuberculata Stimpson, 1858, and the latter was considered as a synonym with S. globosa. Type material of S. tuberculata was lost and controversies centered on whether S. globosa and S. tuberculata belong to the same species. In the present study taxonomic status of S. globosa and S. tuberculata were revealed from fresh specimens and museum collections from Taiwan, South China and Japan and the two are verified to be conspecific. A specimen of S. globosa was designated as the neotype of S. tuberculata. Two additional species from Ryukyus, Japan and Panay, Philippines are each found to be new and discussed herein (as S. ryukyuensis Wong, Chan et Shih, 2010 and S. philippinensis sp. nov. respectively).
The present study reviewed the diagnostic morphological character of 6 East Asian Scopimera species: S. globosa, S. bitympana Shen, 1930, S. longidactyla Shen, 1932, S. intermedia, S. curtelsona Shen, 1936 and S. ryukyuensis, using quantitative multivariate morphological analysis. 175 morphological characters were measured from a total of 60 crabs belonging to 6 species. Parameters contributing significantly to species variation include relative length of external maxilliped merus to ischium, relative length of cheliped carpus, relative length of 1st ambulatory leg carpus and propodus, and total length of 2nd ambulatory leg. A revised identification scheme and taxonomical treatment of the Asian species is provided based on quantitative and qualitative data. The present study further examines the phylogeny of Scopimera in the Indo-West Pacific region using partial sequences of two mitochondrial genes: the large subunit (16S) ribosomal (r)RNA and cytochrome oxidase subunit I (COI). Gene sequences of 8 Indo-Pacific species were obtained. Results do not support the monophyly of the genus, with buddhist crab Tmethypocoelis ceratophora Koelbel, 1897 nested within. Among the four defined groupings, the “normal form” group, containing S. globosa, S. longidactyla, S. intermedia, S. curtelsona, S. ryukyuensis and S. philippinensis sp. nov. is found monophyletic. Within the “normal form” group the species are subdivided into 2 sub-clades: S. intermedia and S. sp. nov. distribute from Southeast Asia to South China, and S. globosa, S. longidactyla, S. curtelsona and S. ryukyuensis confined to East Asia (the Japanese archipelago, Taiwan and the Mainland Chinese coast). |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/47717 |
全文授權: | 有償授權 |
顯示於系所單位: | 生態學與演化生物學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-99-1.pdf 目前未授權公開取用 | 7.74 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。