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A New Species of Microphysogobio (Cypriniformes: Cyprinidae) from Guangxi Province, Southern China

摘要


Microphysogobio zhangi n. sp., a new cyprinid species is described from Guangxi Province, China. Morphological and molecular evidence based on mitochondrial DNA Cytochrome b (Cyt b) sequence were used for comparing this new species and other related species. The phylogenetic tree topology revealed that this new species is closely related to M. elongatus and M. fukiensis. We also observed the existence of a peculiar trans-river gene flow in the Pearl River and the Yangtze River populations, and speculated that it was caused by an ancient artificial canal, the Lingqu Canal, which forming a pathway directly connecting these two rivers.

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