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標題: Taxonomy, phylogeny, and biogeography of the endemic mudflat crab HelicelChasmagnathus complex (Crustacea : Brachyura : Varunidae) from East Asia
作者: Shih, H.T.
Suzuki, H.
關鍵字: Helicana;16S rRNA;cytochrome oxidase I;morphology;distribution;fresh-water crab;molecular systematics;malay peninsula;helice-tridens;decapoda;taiwan;genus;potamidae;grapsidae;phylogeography
Project: Zoological Studies
期刊/報告no:: Zoological Studies, Volume 47, Issue 1, Page(s) 114-125.
The taxonomy, phylogeny, and biogeography of the endemic genera Helice, Helicana, and Chasmagnathus from East Asia were studied using 2 mitochondrial genes: the large subunit (16S) ribosomal (r)RNA and cytochrome oxidase subunit I (COI). Helice and Helicana were each shown to be monophyletic genera, while 3 species of the genus Helice, H. latimera, H. formosensis, and H. tientsinensis, formed an unresolved "H. latimera clade",implying that they may represent the same species with an intraspecific variable number of suborbital tubercles. Helice tridens is predominantly distributed Japan and might be adapted to a more-temperate (northern) climate with cooler temperatures. The 3 species of Helicana can very clearly be genetically distinguished from one another. The sympatric purple and olive forms of Chasmagnathus convexus appear to belong to the same species, and the color differences are probably caused by variable food sources or the substrate on which it lives.
ISSN: 1021-5506
Appears in Collections:生命科學系所

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