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首页> 外文期刊>Zoological Science >Phylogeny of Japanese Stag Beetles (Coleoptera: Lucanidae) Inferred from 16S mtrRNA Gene Sequences, with Reference to the Evolution of Sexual Dimorphism of Mandibles
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Phylogeny of Japanese Stag Beetles (Coleoptera: Lucanidae) Inferred from 16S mtrRNA Gene Sequences, with Reference to the Evolution of Sexual Dimorphism of Mandibles

机译：从16S mtrRNA基因序列推论日本锹形虫（鞘翅目：an科）的系统发生，并参考下颌骨的性二态性的演变。

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摘要

As a first step in reconstructing the phylogeny of world stag beetles (Coleoptera: Lucanidae), phylogenetic relationships among the major members of Japanese stag beetles were explored by analyzing a sequence of 1030 nucleotides from the mitochondrial 16S ribosomal RNA (16S rRNA) gene. A total of 20 species and three additional subspecies representing 13 genera were examined to provide basic information on the phylogeny of world Lucanidae. The resultant phylogenetic tree indicates that the family Lucanidae is monophyletic, and contains two major lineages: one consists of the genera Platycerus, Aesalus, Ceruchus, and Nicagus, and the other includes Dorcus, Rhaetulus, Prosopocoilus, Aegus, Neolucanus, Prismognathus, Lucanus, Figulus, and Nigidius. Generic members of the latter lineage are further divided into the following four sublineages: i) Figulus and Nigidius; ii) Prismognathus and Lucanus; iii) Aegus and Neolucanus; and iv) Dorcus, Rhaetulus, and Prosopocoilus. These molecular phylogenetic relationships are used as a basis for a preliminary exploration of the evolution of sexual dimorphism in the shape of the mandible. The results of this investigation suggest that strong sexual dimorphism with well-developed mandibles in males evolved independently at least twice, once in the genus Aegus and once in the ancestor of the Lucanus-Prismognathus and Dorcus-Rhaetulus-Prosopocoilus clades. Alternatively, it is possible that sexual dimorphism of mandibles has undergone secondary loss in the genera Figulus and Nigidius.
机译：作为重建世界锹形虫（Coleoptera：Lucanidae）的系统发育的第一步，通过分析来自线粒体16S核糖体RNA（16S rRNA）基因的1030个核苷酸序列，探索了日本锹形虫主要成员之间的系统发生关系。共检查了代表13个属的20个物种和三个其他亚种，以提供有关世界Lucanidae的系统发育的基本信息。所形成的系统树表明，Lucanidae家族是单系的，并包含两个主要谱系：一个由Platycerus，Aesalus，Ceruchus和Nicagus属组成，另一个包括Dorcus，Rhaetulus，Prosopocoilus，Aegus，Neolucanus，Prismognathus，Lucanus， Figulus和Nigidius。后一世系的一般成员又分为以下四个子世系：i）ulu和尼吉迪乌斯; ii）Prismognathus和Lucanus; iii）宙斯盾和新葡聚糖; iv）Dorcus，Rhaetulus和Prosopocoilus。这些分子系统发育关系用作下颌骨性二态性进化的初步探索的基础。这项研究的结果表明，雄性下颌骨发达的强烈的性二态性至少两次独立进化，一次发生在宙斯盾属中，一次发生在Lucanus-Prismognathus和Dorcus-Rhaetulus-Prosopocoilus进化枝的祖先中。或者，下颌骨的性二态性可能在Figulus和Nigidius属中遭受了继发性损失。

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