Advancing the understanding of morphological and molecular diversity of the genus Labronema Thorne, 1939 (Nematoda: Dorylaimida) with new insights into its molecular phylogeny

IF 1.5 3区生物学 Q2 ZOOLOGY

Zoologischer Anzeiger Pub Date : 2025-03-01 DOI:10.1016/j.jcz.2025.02.003

Sergio Álvarez-Ortega

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Abstract

The genus Labronema comprises a diverse and widely distributed group of nematodes within the order Dorylaimida. However, its taxonomy remains challenging due to significant morphological variability among species and the limited availability of molecular data. This study provides comprehensive descriptions of four known Labronema species, including the type species of the genus, supported by both morphological and molecular analyses. It also presents a phylogenetic assessment aimed at clarifying evolutionary relationships within the genus. Furthermore, the study incorporates a scanning electron microscopy analysis for three species and reports two species not previously recorded in Spain. Results suggest that Labronema is not a monophyletic taxon, identifying at least three distinct species groups. The postembryonic development of Labronema stechlinensis reveals significant morphological changes, offering valuable insights into the developmental biology and evolutionary morphology of these nematodes. This contribution highlights the importance of integrating morphological and molecular data to address taxonomic and phylogenetic complexities within Labronema.

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Labronema Thorne, 1939 （nematda: Dorylaimida）的形态和分子多样性的进一步认识及其分子系统发育的新见解

Labronema属包括一个种类繁多且分布广泛的Dorylaimida目线虫群。然而，由于物种间形态的显著差异和分子数据的有限可用性，其分类仍然具有挑战性。本文从形态学和分子生物学的角度对已知的四种Labronema进行了全面的描述，包括该属的模式种。它也提出了一个系统发育评估旨在澄清进化关系在属。此外，该研究结合了对三个物种的扫描电子显微镜分析，并报告了两个以前在西班牙没有记录的物种。结果表明，Labronema不是一个单系分类单元，至少有三个不同的种群。在胚胎后的发育过程中，发现了显著的形态变化，为线虫的发育生物学和进化形态学提供了有价值的见解。这一贡献突出了整合形态学和分子数据的重要性，以解决Labronema的分类和系统发育复杂性。

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

Zoologischer Anzeiger 生物-动物学

CiteScore

2.80

自引率

7.10%

发文量

审稿时长

>12 weeks

期刊介绍： Zoologischer Anzeiger - A Journal of Comparative Zoology is devoted to comparative zoology with a special emphasis on morphology, systematics, biogeography, and evolutionary biology targeting all metazoans, both modern and extinct. We also consider taxonomic submissions addressing a broader systematic and/or evolutionary context. The overall aim of the journal is to contribute to our understanding of the organismic world from an evolutionary perspective. The journal Zoologischer Anzeiger invites suggestions for special issues. Interested parties may contact one of the editors.