Underestimated diversity: Integrative taxonomy of Mesenchytraeus (Enchytraeidae, Clitellata) from Changbai Mountain, China

IF 2.3 2区生物学 Q2 EVOLUTIONARY BIOLOGY

Zoologica Scripta Pub Date : 2023-11-03 DOI:10.1111/zsc.12637

Juanjuan Chen, Rüdiger M. Schmelz, Junqian Zhang, Zhicai Xie

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引用次数: 0

Abstract

Abstract The holarctic genus Mesenchytraeus is one of the species‐rich genera in the family Enchytraeidae. Changbai Mountain supports high diversity of Mesenchytraeus species, making it an ideal area to explore species boundaries. We explored species boundaries of Mesenchytraeus using an integrative approach. Morphological taxonomy recognized 10 species in this region, five of them new to science. In contrast, molecular species delimitation analyses showed that there are at least 16 species, 11 of them new to science. Clear genetic gaps were observed among species with high interspecific distances (10%–21.2%) and low intraspecific distances (0.2%–6.7%) based on uncorrected p‐distance of the COI gene. Morphological species complex M. spermatoglomeratus consists of three species, M. spermatoglomeratus Zhang, Lu & Xie, 2018 sensu stricto, M. rijina sp. n., and M. manchu sp. n. The M. duodiverticulus complex consists of M. duodiverticulus sp. n. and M. similiduodiverticulus sp. n. The M. monodiverticulus complex consists of M. monodiverticulus Shen, Chen & Xie, 2012 sensu stricto, M. ngulen sp. n., M. zhenggulen sp. n., and M. fokulen sp. n. Further new species, distinguishable with morphological as well as molecular methods, are M. similigigachaetus sp. n., M. parvidiverticulus sp. n., M. digitalisdiverticulus sp. n., and M. infradiverticulus sp. n. Finally, we inferred the morphogenetic processes of spermathecae and sperm bundles, and filtrated some morphological characters which are useful to identify species. As the first attempt in this genus, our study provides an opportunity to discuss the currently used taxonomic criteria and acquire new ideas for the taxonomy of enchytraeids.

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被低估的多样性:长白山间叶蕨(间叶蕨科)综合分类

全北极Mesenchytraeus属是enchytraedae科中物种丰富的属之一。长白山具有丰富的间叶类物种多样性，是探索物种边界的理想区域。我们使用综合方法探索了间叶兽的物种边界。形态学分类鉴定该地区有10种，其中5种为新种。相比之下，分子物种划分分析表明，至少有16个物种，其中11个是科学上的新物种。基于未校正的COI基因p - distance，在高种间距离(10%-21.2%)和低种内距离(0.2%-6.7%)的物种之间观察到明显的遗传差距。形态种复合体M. spermatoglomeratus由三个种组成，M. spermatoglomeratus Zhang, Lu &M. duo憩室复合体由M. duo憩室sp. n.和M. similidu憩室sp. n.组成。M. monodiverticulus复合体由M. monodiverticulus Shen, Chen等;另外，通过形态学和分子方法可区分的新种有M. similigachaetus sp. n.、M. parvidiverticulus sp. n.、M. digitalisdiverticulus sp. n.和M. infradiverticulus sp. n.。最后，我们推断了精囊和精子束的形态发生过程，并过滤了一些有助于物种识别的形态学特征。本属的首次尝试，对目前常用的分类标准进行了讨论，并为蛭形类的分类提供了新的思路。

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

Zoologica Scripta 生物-动物学

CiteScore

5.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Zoologica Scripta publishes papers in animal systematics and phylogeny, i.e. studies of evolutionary relationships among taxa, and the origin and evolution of biological diversity. Papers can also deal with ecological interactions and geographic distributions (phylogeography) if the results are placed in a wider phylogenetic/systematic/evolutionary context. Zoologica Scripta encourages papers on the development of methods for all aspects of phylogenetic inference and biological nomenclature/classification. Articles published in Zoologica Scripta must be original and present either theoretical or empirical studies of interest to a broad audience in systematics and phylogeny. Purely taxonomic papers, like species descriptions without being placed in a wider systematic/phylogenetic context, will not be considered.