Ictalurus Rafinesque鲶鱼属的多基因系统发育,1820(放线鸟纲,鲇形目)及其系统和进化意义。

Rodolfo Pérez-Rodríguez, Omar Domínguez-Domínguez, Carlos Pedraza-Lara, Rogelio Rosas-Valdez, Gerardo Pérez-Ponce de León, Ana Berenice García-Andrade, Ignacio Doadrio
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引用次数: 0

摘要

背景:Ictalurus是北美淡水鱼类中最具代表性的类群之一。尽管该类群有着经过充分研究的化石记录,并进行了几次形态学和分子系统发育研究,但不完整的分类学采样和不充分的分类学研究产生了相当复杂的分类,以及该属复杂的进化史模式,这些模式被认为尚未解决,仍在争论中。结果:基于四个基因座和迄今为止分析的最全面的分类学抽样,包括目前公认的物种、以前同义的物种、未描述的分类群和研究不足的种群,这项研究产生了一个解析的系统发育框架,为Ictalurus属提供了合理的物种划界和进化时间框架。结论:我们的系统发育假说表明,Ictaluru至少包括13个进化单元,部分证实了当前的分类,并确定了作为假定的未描述分类群出现的种群。该物种的分化时间表明,冰龙的多样化可以追溯到渐新世早期,这证实了它是冰龙科中最古老的属之一。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Multi-locus phylogeny of the catfish genus Ictalurus Rafinesque, 1820 (Actinopterygii, Siluriformes) and its systematic and evolutionary implications.

Multi-locus phylogeny of the catfish genus Ictalurus Rafinesque, 1820 (Actinopterygii, Siluriformes) and its systematic and evolutionary implications.

Multi-locus phylogeny of the catfish genus Ictalurus Rafinesque, 1820 (Actinopterygii, Siluriformes) and its systematic and evolutionary implications.

Multi-locus phylogeny of the catfish genus Ictalurus Rafinesque, 1820 (Actinopterygii, Siluriformes) and its systematic and evolutionary implications.

Background: Ictalurus is one of the most representative groups of North American freshwater fishes. Although this group has a well-studied fossil record and has been the subject of several morphological and molecular phylogenetic studies, incomplete taxonomic sampling and insufficient taxonomic studies have produced a rather complex classification, along with intricate patterns of evolutionary history in the genus that are considered unresolved and remain under debate.

Results: Based on four loci and the most comprehensive taxonomic sampling analyzed to date, including currently recognized species, previously synonymized species, undescribed taxa, and poorly studied populations, this study produced a resolved phylogenetic framework that provided plausible species delimitation and an evolutionary time framework for the genus Ictalurus.

Conclusions: Our phylogenetic hypothesis revealed that Ictalurus comprises at least 13 evolutionary units, partially corroborating the current classification and identifying populations that emerge as putative undescribed taxa. The divergence times of the species indicate that the diversification of Ictalurus dates to the early Oligocene, confirming its status as one of the oldest genera within the family Ictaluridae.

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