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A New Species of the Genus Otacilia

Otacilia dadongshanica sp. nov., male holotype.

A New Species of the Genus Otacilia

Otacilia dadongshanica sp. nov., male holotype.

Comparative Mitogenomic and Phylogentic Analyses of a Schizothoracine Fish, Gymnodiptychus dybowskii from Two Water Systems in Xinjiang

Comparative Mitogenomic and Phylogentic Analyses of a Schizothoracine Fish, Gymnodiptychus dybowskii from Two Water Systems in Xinjiang

Wei Meng1,3, Tianyan Yang2,*, Yunguo Liu1, Mahmut Halik1 and Tianxiang Gao2

ABSTRACT

Gymnodiptychus dybowskii belonging to subfamily Schizothoracinaeis a rare and endangered aboriginal fish in Xinjiang. In this study, the complete mitochondrial genomes of G. dybowskii from Tarim River system (16, 677bp) and Ili River system (16, 667bp) were sequenced. Besides, their genetic characteristics were also identified and compared simultaneously. Genetic distance and sequence differentiation suggested that great genetic variation existed within species and the sample from Kaidu River in South Xinjiang might be a cryptic species or subspecies of G. dybowskii. The phylogenetic analyses from 12 concatenated H-strand-encoding protein genes were conducted by Neighbor-Joining method to reveal the evolutionary relationships within subfamily Schizothoracinae. Three different grades of schizothoracine fishes were well recognized from each other in branching diagram. The primitive group and the specialized group + the highly specialized group constituted a sister relationship with strong supports.

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Pakistan Journal of Zoology

November

Pakistan J. Zool., Vol. 56

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