Coevolutionary Implications of Obligate Commensalism in Sea Turtles: the Case of the Genus Hyachelia Barnard, 1967 (Crustacea, Amphipoda).

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-12-13 eCollection Date: 2023-01-01 DOI:10.6620/ZS.2023.62-54

Tammy Iwasa-Arai, Sónia C S Andrade, Camila Miguel, Silvana G L B Siqueira, Max Rondon Werneck, Fosca P P Leite, Lara Moraes, Marcelo Renan D Santos, Luciana S Medeiros, Uylia H Lopes, Cristiana Serejo

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Abstract

Obligate commensalism in the marine environment and its evolutionary role are still poorly understood. Although sea turtles may serve as ideal substrates for epibionts, within amphipods, only the genus Hyachelia evolved in obligate commensalism with turtles. Here, we report a new host record for Hyachelia lowryi on the hawksbill turtle and describe a larger distribution of the genus in the Atlantic Ocean on green and loggerhead turtles. Hyachelia spp. were sampled from nesting sites of Caretta caretta and feeding grounds of Eretmochelys imbricata and Chelonia mydas along the Brazilian coast. Insights regarding the coevolution of this remarkable genus with its hosts based on molecular analyses are inferred based on mitochondrial (COI) and nuclear (18SrRNA) genes using new and previously available sequences from the infraorder Talitrida. Divergence times for Hyachelia are around the Cretaceous (~127.66 Mya), corresponding to an ancient origin and in agreement with modern green turtle (Chelonioidea) radiation. Later, diversification of Hyachelia species is dated at about 26 Mya, suggesting a coevolutionary association between amphipods and Carettini/Chelonini sea turtles.

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海龟义务共生的共同进化意义：以 Hyachelia 属为例 Barnard，1967 年（甲壳纲，两足目）。

人们对海洋环境中的强制性共生及其进化作用仍然知之甚少。虽然海龟可以作为附生虫的理想底物，但在片脚类动物中，只有Hyachelia属与海龟进化出了强制性共生关系。在这里，我们报告了 Hyachelia lowryi 在玳瑁上的新宿主记录，并描述了该属在大西洋绿海龟和蠵龟上的更大分布范围。我们在巴西沿岸的 Caretta caretta 筑巢地以及 Eretmochelys imbricata 和 Chelonia mydas 的觅食地采集了 Hyachelia 属的样本。根据线粒体（COI）和核（18SrRNA）基因，利用新的和以前可获得的 Talitrida 下目序列，通过分子分析推断了这一显著属种与其宿主的共同进化。Hyachelia的分化时间大约在白垩纪（约127.66 Mya），与现代绿海龟（Chelonioidea）的辐射一致，起源古老。其后，Hyachelia物种多样化的时间约为26 Mya，这表明片脚类动物与Carettini/Chelonini海龟之间存在共同进化的关系。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.