墨西哥湾北部 Palaemon 种(十足目:鲤形目:Palaemonidae)的分类和遗传多样性

Diversity Pub Date : 2024-09-04 DOI:10.3390/d16090543
Daniel D. Fanning, Mary K. Wicksten, Anja Schulze
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引用次数: 0

摘要

草虾属(甲壳纲,十足目,Palaemonidae)分布于世界各地的淡水和盐碱湿地。Palaemon属的物种经常被误认,该属本身也曾多次重组。为了澄清属内的系统发育关系并分析区域遗传多样性,我们对墨西哥湾北部采集的标本进行了线粒体细胞色素 c 氧化酶亚单位 I(COI)和核组蛋白 H3(H3)基因片段测序。生成的序列与公开的 Palaemon 序列相结合,进行系统发育和单倍型分析。我们的分析表明,喙式是一个不可靠的物种鉴定特征,密西西比河并没有成为东部和西部种群之间的遗传屏障,淡水物种很可能不是从该地区的咸水物种衍生而来。
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Taxonomic and Genetic Diversity in Palaemon Species (Decapoda: Caridea: Palaemonidae) of the Northern Gulf of Mexico
Grass shrimp of the genus Palaemon (Crustacea, Decapoda, Palaemonidae) occur worldwide in freshwater and saline wetlands. Palaemon species are frequently misidentified, and the genus itself has been reorganized several times. To clarify the intrageneric phylogenetic relationships and analyze the regional genetic diversity, we sequenced fragments of the mitochondrial cytochrome c oxidase subunit I (COI) and the nuclear Histone H3 (H3) genes from specimens collected along the northern Gulf of Mexico, where several morphologically similar Palaemon species reside. The generated sequences were combined with publicly available Palaemon sequences for phylogenetic and haplotype analyses. Our analyses indicate that the rostral formula is an unreliable character for species identification, that the Mississippi River does not act as a genetic barrier between the eastern and western populations, and that freshwater species are likely not derived from the saltwater species in the region.
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