男性生殖装置和精子超微结构的形态学Thaumastocoris peregrinus Carpintero & Dellape 2006(半翅目:Thaumastocoridae)

IF 2.2 3区工程技术 Q1 MICROSCOPY

Micron Pub Date : 2025-03-07 DOI:10.1016/j.micron.2025.103811

Paulo Henrique Rezende , Dayvson Ayala-Costa , Mauricio da Silva Paulo , Glenda Dias , José Lino-Neto

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引用次数: 0

摘要

本研究利用光镜和透射电镜对桉树人工林害虫peregrinus （Thaumastocoris peregrinus, Thaumastocoris peregrinus）的雄性生殖器官和精子形态进行研究，探讨其系统发育意义。生殖器官包括成对的睾丸，每个有三个卵泡，扩张的传出管作为精囊，成对的附属腺和射精管连接到一个阴茎。精子为丝状，长约465 µm，具有短的梭状核(<；6 µm)和顶体仅在TEM下可见。异翅目的关键突触形态，包括对称的线粒体衍生物与旁晶包涵体和轴突衍生物桥。睾丸卵泡以晚期精细胞居多，无明显分化带，与以往的描述不同。这些显著的特征可能支持了最近的系统发育定位，即将Thaumastocoridae作为Pentatomomorpha的姊妹类群。

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Morphology of the male reproductive apparatus and sperm ultrastructure of Thaumastocoris peregrinus Carpintero & Dellape 2006 (Heteroptera: Thaumastocoridae)

In this study, we examine the male reproductive apparatus and sperm morphology of Thaumastocoris peregrinus (Thaumastocoridae), a pest of Eucalyptus plantations, to explore its phylogenetic implications using light and transmission electron microscopy. The reproductive apparatus comprises paired testes with three follicles each, dilated efferent ducts acting as seminal vesicles, paired accessory glands, and ejaculatory duct that connects with an aedeagus. Sperm are filiform, around 465 µm long, with short, fusiform nuclei (< 6 µm) and an acrosome observable only under TEM. Key synapomorphies of Heteroptera, including symmetrical mitochondrial derivatives with paracrystalline inclusions and axoneme-derivative bridges, are present. The testicular follicles had mostly late spermatids and no evident differentiation zone, which was different from previously described. These distinctive features may support the recent phylogenetic placement of Thaumastocoridae as a sister group to Pentatomomorpha.

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来源期刊

Micron 工程技术-显微镜技术

CiteScore

4.30

自引率

4.20%

发文量

100

审稿时长

31 days

期刊介绍： Micron is an interdisciplinary forum for all work that involves new applications of microscopy or where advanced microscopy plays a central role. The journal will publish on the design, methods, application, practice or theory of microscopy and microanalysis, including reports on optical, electron-beam, X-ray microtomography, and scanning-probe systems. It also aims at the regular publication of review papers, short communications, as well as thematic issues on contemporary developments in microscopy and microanalysis. The journal embraces original research in which microscopy has contributed significantly to knowledge in biology, life science, nanoscience and nanotechnology, materials science and engineering.