Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China

There is increasing evidence that species diversity is underestimated in the current taxonomy of widespread freshwater fishes. The bagrid species T. albomarginatus s.l. is mainly distributed in the lowlands of South China, as currently identified. A total of 40 localities (including the type localit...

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Autores principales:	Wei-Han Shao, Jian-Li Cheng, E Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	cryptic species allopatric speciation integrative taxonomy species delineation freshwater fishes Genetics QH426-470
Acceso en línea:	https://doaj.org/article/b8d5a409b81143f68f31a3956a38d390
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spelling	oai:doaj.org-article:b8d5a409b81143f68f31a3956a38d3902021-11-17T07:04:25ZEight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China1664-802110.3389/fgene.2021.713793https://doaj.org/article/b8d5a409b81143f68f31a3956a38d3902021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fgene.2021.713793/fullhttps://doaj.org/toc/1664-8021There is increasing evidence that species diversity is underestimated in the current taxonomy of widespread freshwater fishes. The bagrid species T. albomarginatus s.l. is mainly distributed in the lowlands of South China, as currently identified. A total of 40 localities (including the type locality), which covers most of its known range, were sampled. Molecular phylogenetic analyses based on concatenated mtDNA and nuclear genes recover nine highly supported lineages clustering into eight geographic populations. The integration of molecular evidence, morphological data, and geographic distribution demonstrates the delineation of T. albomarginatus s.l. as eight putative species. Four species, namely, T. albomarginatus, T. lani, T. analis, and T. zhangfei sp. nov. and the T. similis complex are taxonomically recognized herein. Moreover, T. zhangfei sp. nov. comprises two genetically distinct lineages with no morphological and geographical difference. This study also reveals aspects of estimation of divergence time, distribution, and ecological adaption within the T. albomarginatus group. The unraveling of the hidden species diversity of this lowland bagrid fish highlights the need for not only the molecular scrutiny of widely distributed species of South China but also the adjustment of current biodiversity conservation strategies to protect the largely overlooked diversity of fishes from low-elevation rapids.Wei-Han ShaoWei-Han ShaoJian-Li ChengE ZhangFrontiers Media S.A.articlecryptic speciesallopatric speciationintegrative taxonomyspecies delineationfreshwater fishesGeneticsQH426-470ENFrontiers in Genetics, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cryptic species allopatric speciation integrative taxonomy species delineation freshwater fishes Genetics QH426-470
spellingShingle	cryptic species allopatric speciation integrative taxonomy species delineation freshwater fishes Genetics QH426-470 Wei-Han Shao Wei-Han Shao Jian-Li Cheng E Zhang Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China
description	There is increasing evidence that species diversity is underestimated in the current taxonomy of widespread freshwater fishes. The bagrid species T. albomarginatus s.l. is mainly distributed in the lowlands of South China, as currently identified. A total of 40 localities (including the type locality), which covers most of its known range, were sampled. Molecular phylogenetic analyses based on concatenated mtDNA and nuclear genes recover nine highly supported lineages clustering into eight geographic populations. The integration of molecular evidence, morphological data, and geographic distribution demonstrates the delineation of T. albomarginatus s.l. as eight putative species. Four species, namely, T. albomarginatus, T. lani, T. analis, and T. zhangfei sp. nov. and the T. similis complex are taxonomically recognized herein. Moreover, T. zhangfei sp. nov. comprises two genetically distinct lineages with no morphological and geographical difference. This study also reveals aspects of estimation of divergence time, distribution, and ecological adaption within the T. albomarginatus group. The unraveling of the hidden species diversity of this lowland bagrid fish highlights the need for not only the molecular scrutiny of widely distributed species of South China but also the adjustment of current biodiversity conservation strategies to protect the largely overlooked diversity of fishes from low-elevation rapids.
format	article
author	Wei-Han Shao Wei-Han Shao Jian-Li Cheng E Zhang
author_facet	Wei-Han Shao Wei-Han Shao Jian-Li Cheng E Zhang
author_sort	Wei-Han Shao
title	Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China
title_short	Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China
title_full	Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China
title_fullStr	Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China
title_full_unstemmed	Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China
title_sort	eight in one: hidden diversity of the bagrid catfish tachysurus albomarginatus s.l. (rendhal, 1928) widespread in lowlands of south china
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/b8d5a409b81143f68f31a3956a38d390
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Eight in One: Hidden Diversity of the Bagrid Catfish Tachysurus albomarginatus s.l. (Rendhal, 1928) Widespread in Lowlands of South China

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