The ultrastructure of the spermatheca of Mordellistena brevicauda (Coleoptera, Tenebrionoidea) and the associated bacterial cells

IF 1.7 3区农林科学 Q2 ENTOMOLOGY Arthropod Structure & Development Pub Date : 2024-04-26 DOI:10.1016/j.asd.2024.101357

Romano Dallai, David Mercati, Pietro Lupetti

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Abstract

The ultrastructural study on the female reproductive system of the beetle M. brevicauda (Mordellidae) confirmed the positive correlation between the length of the sperm and the size of the female seminal receptacle (Spermatheca).

The spermatheca of the species is characterized by an apical bulb-like structure where the spermathecal duct forms numerous folds filled with sperm. At this level many bacterial cells are present intermingled with the duct folds. Some are organized in large structures, such as bacteriomes, while other are single bacteriocytes. The latter are often found near the basal lamina of duct epithelium. In addition, some bacteria are visible in the cytoplasm of the duct epithelial cells. Interestingly, bacterial cells have never been observed in the duct lumen. The possible function of the bacterial cells is discussed.

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Mordellistena brevicauda（鞘翅目，Tenebrionoidea）精巢的超微结构及相关细菌细胞

对甲虫(Mordellidae)雌性生殖系统的超微结构研究证实，精子的长度与雌性精囊（Spermatheca）的大小呈正相关。在这一层，许多细菌细胞与导管褶皱交织在一起。其中一些形成大型结构，如细菌体，而另一些则是单个细菌细胞。后者通常出现在导管上皮基底层附近。此外，在导管上皮细胞的细胞质中也能看到一些细菌。有趣的是，从未在导管腔内观察到细菌细胞。本文讨论了细菌细胞可能具有的功能。

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来源期刊

Arthropod Structure & Development 生物-昆虫学

CiteScore

3.50

自引率

10.00%

发文量

审稿时长

60 days

期刊介绍： Arthropod Structure & Development is a Journal of Arthropod Structural Biology, Development, and Functional Morphology; it considers manuscripts that deal with micro- and neuroanatomy, development, biomechanics, organogenesis in particular under comparative and evolutionary aspects but not merely taxonomic papers. The aim of the journal is to publish papers in the areas of functional and comparative anatomy and development, with an emphasis on the role of cellular organization in organ function. The journal will also publish papers on organogenisis, embryonic and postembryonic development, and organ or tissue regeneration and repair. Manuscripts dealing with comparative and evolutionary aspects of microanatomy and development are encouraged.