Revision of the Genus Rhyacichthys Using Integrative Taxonomy

IF 0.7 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY

Pacific Science Pub Date : 2022-09-22 DOI:10.2984/76.2.3

Vincent Haÿ, M. Mennesson, P. Keith, C. Lord

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引用次数: 0

Abstract

Abstract: The rivers of tropical islands are colonized by amphidromous species. The order Gobiiformes presents the major diversity in these teleost communities. The genus Rhyacichthys forms a particular group within this order, with the presence of several plesiomorphic characters but also because it constitutes the sister group of all other Gobiiformes. The genus Rhyacichthys includes two valid species: Rhyacichthys aspro (Valenciennes, 1837) and Rhyacichthys guilberti Dingerkus & Séret, 1992 which are only found in the western Pacific (e.g., Vanuatu, Indonesia, Japan). The aim of the present study consists of the taxonomic revision of the genus, in which more than two species are suspected, using integrative taxonomy. Morphomeristic and molecular analyses (partial mtDNA, 7134 bp) were conducted on recent and collection specimens, including type specimens. Short fragments of mtDNA (<130 bp) were obtained for type specimens of R. aspro and R. guilberti. These results allowed us to highlight morphological and genetical differences between the two valid species and to resurrect a third one. This integrative approach helped to clarify relations within the genus and its distribution range with a better understanding for this poorly studied group.

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用综合分类学对鲤科鱼属的修订

摘要：热带岛屿的河流是由两栖产卵物种殖民的。Gobiformes目在这些硬骨动物群落中呈现出主要的多样性。Rhyachichthys属在这个目中形成了一个特殊的类群，有几个蛇形特征，但也因为它构成了所有其他Gobiformes的姐妹类群。Rhyachichthys属包括两个有效物种：Rhyachithys aspro（Valenciennes，1837）和Rhyachichithys guilberti Dingerkus&Séret，1992，它们只在西太平洋（如瓦努阿图、印度尼西亚、日本）发现。本研究的目的是使用综合分类学对该属进行分类学修订，其中怀疑有两个以上的物种。对近期和采集的标本（包括模式标本）进行了形态分生组织和分子分析（部分mtDNA，7134bp）。获得了R.aspro和R.guilberti模式标本的mtDNA短片段（<130bp）。这些结果使我们能够强调这两个有效物种之间的形态学和遗传学差异，并使第三个物种复活。这种综合方法有助于澄清属内的关系及其分布范围，更好地了解这一研究不足的群体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Pacific Science 生物-动物学

CiteScore

1.40

自引率

14.30%

发文量

审稿时长

3 months

期刊介绍： Pacific Science: A Quarterly Devoted to the Biological and Physical Sciences of the Pacific Region The official journal of the Pacific Science Association. Appearing quarterly since 1947, Pacific Science is an international, multidisciplinary journal reporting research on the biological and physical sciences of the Pacific basin. It focuses on biogeography, ecology, evolution, geology and volcanology, oceanography, paleontology, and systematics. In addition to publishing original research, the journal features review articles providing a synthesis of current knowledge.