Six in one: cryptic species and a new host record for Olixon Cameron (Rhopalosomatidae, Hymenoptera) revealed by DNA barcoding

IF 17.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-05-07 DOI:10.3897/jhr.97.116726

Allaina L. Armstrong, J. Sones, Volker Lohrmann, P. Hebert, Daniel H. Janzen, W. Hallwachs, J. Blaschke

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Abstract

Olixon testaceum is a widely distributed species of brachypterous parasitoid wasp (Vespoidea: Rhopalosomatidae) occurring in Meso- and South America, but little is known of its biology. Here, the first known host of O. ? testaceum is identified as the cricket Anaxipha sp. (Grylloidea: Trigonidiidae) through DNA barcoding of six Olixon larvae and their hosts. Barcoding results also indicated substantial genetic diversity within nominal O. testaceum specimens. The number of species and statistical significance of these groups were tested using Maximum Likelihood phylogenies, distance-based cluster analyses, and coalescence models. All analyses revealed at least six distinct lineages, which suggests six or more cryptic species within O. ? testaceum. Combined with what is currently known about Rhopalosoma host use, these results indicate that rhopalosomatids may be generalist rather than specialist parasitoids, and further confirm the benefits of open global collaboration and DNA barcoding in advancing taxonomic knowledge.

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六合一：通过 DNA 条形码揭示 Olixon Cameron（Rhopalosomatidae，膜翅目）的隐种和新寄主记录

Olixon testaceum是一种广泛分布于中美洲和南美洲的腕足动物寄生蜂（Vespoidea: Rhopalosomatidae），但人们对其生物学特性知之甚少。在此，通过对六只 Olixon 幼虫及其宿主进行 DNA 条形编码，确定了 O. testaceum 的第一个已知宿主为蟋蟀 Anaxipha sp.（蝼蛄科：Trigonidiidae）。条形码结果还表明，在标称的 O. testaceum 标本中存在大量遗传多样性。利用最大似然系统进化、基于距离的聚类分析和凝聚模型对这些群体的物种数量和统计意义进行了检验。所有分析都显示至少有六个不同的品系，这表明 O. testaceum 中有六个或更多的隐性物种。结合目前已知的 Rhopalosoma 寄主利用情况，这些结果表明 Rhopalosomatids 可能是通性寄生虫，而不是专性寄生虫，并进一步证实了开放式全球合作和 DNA 条形码在促进分类知识方面的益处。

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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.