Recent vicariant and dispersal events affecting the phylogeny and biogeography of East Asian freshwater crab genus Nanhaipotamon (Decapoda: Potamidae)

The four clades of the freshwater crab genus Nanhaipotamon from Taiwan, Hong Kong and the Chinese coastal provinces based on the molecular results. [Display omitted] ► Nanhaipotamon is monophyletic with four clades agreeing with the East Asian topography. ► The genus originated between Wuyishan and...

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Bibliographic Details
Published in:Molecular phylogenetics and evolution 2011-03, Vol.58 (3), p.427-438
Main Authors: Shih, Hsi-Te, Zhou, Xian-Min, Chen, Guo-Xiao, Chien, I-Chu, Ng, Peter K.L.
Format: Article
Language:English
Subjects:
16S rRNA
28S rRNA
Animals
Asian
biogeography
Brachyura
Brachyura - classification
Brachyura - genetics
China
Cladding
Coastal
COI
Crabs
cytochrome-c oxidase
Decapoda
Dispersal
DNA, Mitochondrial - genetics
Electron Transport Complex IV - genetics
Evolution, Molecular
Far East
Freshwater
Freshwater crabs
Freshwaters
Geography
glaciation
Haplotypes
Islands
Likelihood Functions
monophyly
Mountains
Nanhaipotamon
Phylogeny
Potamidae
ribosomal RNA
rivers
RNA, Ribosomal, 16S - genetics
RNA, Ribosomal, 28S - genetics
Sequence Analysis, DNA
Straits
topography
Vicariance
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Summary:The four clades of the freshwater crab genus Nanhaipotamon from Taiwan, Hong Kong and the Chinese coastal provinces based on the molecular results. [Display omitted] ► Nanhaipotamon is monophyletic with four clades agreeing with the East Asian topography. ► The genus originated between Wuyishan and Nanling Ranges with cladogenesis ∼4.8mya. ► The invasion of the genus into Taiwan during the Pleistocene interglaciation period. ► The Penghu Nanhaipotamon formosanum population is a relict of the past Pleistocene glaciations. The molecular phylogeny and biogeography of the East Asian freshwater crabs of the genus Nanhaipotamon (Decapoda: Brachyura: Potamidae) were studied, using two mitochondrial (16S rRNA and cytochrome oxidase I) and one nuclear (28S rRNA) markers, and correlated with various vicariant and dispersal events which have occurred in this region. The results showed Nanhaipotamon to be a monophyletic taxon with four clades which correspond to the topography of the coastal region of southeastern China and Taiwan Island. Mountains appear to play an important role in the distribution. The genus occurs only from east of the Wuyishan Range (Zhejiang and Fujian) and south of the Nanling Range (Guangdong) in southern China, and is also present west of the Central Range in Taiwan. The molecular and geological data suggest that Nanhaipotamon originated in an area between the Wuyishan and Nanling Ranges. In this area, the main and earliest cladogenesis occurred at ∼4.8 million years ago (mya), with speciation probably taking place at around 4mya. The molecular evidence strongly supports the recent invasion of the genus into Taiwan Island from northeastern Fujian, via the paleo-Minjiang River on the landbridge of Taiwan Strait. The presence of the genus in Dongyin Island, however, is through invasion from southeastern Zhejiang, during the Pleistocene glaciation period. Nanhaipotamon reached Taiwan and Dongyin Island at ∼1.0 and 0.4mya, respectively. A small population of Nanhaipotamon formosanum from Penghu Islands (Pescadores) in the central Taiwan Strait has a slightly different genetic constitution and suggests it is a relict of past Pleistocene glaciations.
ISSN:1055-7903
1095-9513
DOI:10.1016/j.ympev.2010.11.013