New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera)
The sperm ultrastructure of a few representative species of Tenebrionoidea was studied. Two species belong to the Mordellidae (<i>Mordellistena brevicauda and Hoshihananomia</i> sp.), one species to Oedemeridae (<i>Oedemera nobilis</i>), and one species to Tenebrionidae (<...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Insects |
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| Online Access: | https://www.mdpi.com/2075-4450/13/5/485 |
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| author | Glenda Dias David Mercati Paulo Henrique Rezende José Lino-Neto Pietro Paolo Fanciulli Pietro Lupetti Romano Dallai |
| author_facet | Glenda Dias David Mercati Paulo Henrique Rezende José Lino-Neto Pietro Paolo Fanciulli Pietro Lupetti Romano Dallai |
| author_sort | Glenda Dias |
| collection | DOAJ |
| description | The sperm ultrastructure of a few representative species of Tenebrionoidea was studied. Two species belong to the Mordellidae (<i>Mordellistena brevicauda and Hoshihananomia</i> sp.), one species to Oedemeridae (<i>Oedemera nobilis</i>), and one species to Tenebrionidae (<i>Accanthopus velikensis</i>). It is confirmed that Mordellidae are characterized by the lowest number of spermatozoa per cyst (up to 64), a number shared with Ripiphoridae. In contrast, in the two other families, up to 512 spermatozoa per cyst are observed, the same number present, for example, in Tenebrionidae. Also, as in the other more derived families of tenebrionoids studied so far, during spermatogenesis in <i>O. nobilis</i> and <i>A. velikensis</i>, sperm nuclei are regularly distributed in two sets at opposite poles of the cysts. On the contrary, the Mordellidae species do not exhibit this peculiar process. However, during spermiogenesis, the bundles of sperm bend to form a loop in their median region, quite evident in the <i>Hoshihananomia</i> sp., characterized by long sperm. This process, which also occurs in Ripiphoridae, probably enables individuals to produce long sperm without an increase in testicular volume. The sperm looping could be a consequence of the asynchronous growth between cyst size and sperm length. The sperm ultrastructure of the Mordellidae species reveals that they can be differentiated from other Tenebrionoidea based on the shape and size of some sperm components, such as the accessory bodies and the mitochondrial derivatives. They also show an uncommon stiff and immotile posterior flagellar region provided with only accessory tubules. These results contribute to a better knowledge of the phylogenetic relationship of the basal families of the large group of Tenebrionoidea. |
| first_indexed | 2024-03-10T03:41:26Z |
| format | Article |
| id | doaj.art-5c5e8d1891514fb4ba03acbf2d7d68cc |
| institution | Directory Open Access Journal |
| issn | 2075-4450 |
| language | English |
| last_indexed | 2024-03-10T03:41:26Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj.art-5c5e8d1891514fb4ba03acbf2d7d68cc2023-11-23T11:32:20ZengMDPI AGInsects2075-44502022-05-0113548510.3390/insects13050485New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera)Glenda Dias0David Mercati1Paulo Henrique Rezende2José Lino-Neto3Pietro Paolo Fanciulli4Pietro Lupetti5Romano Dallai6Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, BrazilDipartimento Scienze della Vita, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, ItalyDepartamento de Entomologia, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, BrazilDepartamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, BrazilDipartimento Scienze della Vita, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, ItalyDipartimento Scienze della Vita, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, ItalyDipartimento Scienze della Vita, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, ItalyThe sperm ultrastructure of a few representative species of Tenebrionoidea was studied. Two species belong to the Mordellidae (<i>Mordellistena brevicauda and Hoshihananomia</i> sp.), one species to Oedemeridae (<i>Oedemera nobilis</i>), and one species to Tenebrionidae (<i>Accanthopus velikensis</i>). It is confirmed that Mordellidae are characterized by the lowest number of spermatozoa per cyst (up to 64), a number shared with Ripiphoridae. In contrast, in the two other families, up to 512 spermatozoa per cyst are observed, the same number present, for example, in Tenebrionidae. Also, as in the other more derived families of tenebrionoids studied so far, during spermatogenesis in <i>O. nobilis</i> and <i>A. velikensis</i>, sperm nuclei are regularly distributed in two sets at opposite poles of the cysts. On the contrary, the Mordellidae species do not exhibit this peculiar process. However, during spermiogenesis, the bundles of sperm bend to form a loop in their median region, quite evident in the <i>Hoshihananomia</i> sp., characterized by long sperm. This process, which also occurs in Ripiphoridae, probably enables individuals to produce long sperm without an increase in testicular volume. The sperm looping could be a consequence of the asynchronous growth between cyst size and sperm length. The sperm ultrastructure of the Mordellidae species reveals that they can be differentiated from other Tenebrionoidea based on the shape and size of some sperm components, such as the accessory bodies and the mitochondrial derivatives. They also show an uncommon stiff and immotile posterior flagellar region provided with only accessory tubules. These results contribute to a better knowledge of the phylogenetic relationship of the basal families of the large group of Tenebrionoidea.https://www.mdpi.com/2075-4450/13/5/485insect sperm ultrastructurebasal Tenebrionoideasperm looping |
| spellingShingle | Glenda Dias David Mercati Paulo Henrique Rezende José Lino-Neto Pietro Paolo Fanciulli Pietro Lupetti Romano Dallai New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera) Insects insect sperm ultrastructure basal Tenebrionoidea sperm looping |
| title | New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera) |
| title_full | New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera) |
| title_fullStr | New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera) |
| title_full_unstemmed | New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera) |
| title_short | New Findings on the Sperm Structure of Tenebrionoidea (Insecta, Coleoptera) |
| title_sort | new findings on the sperm structure of tenebrionoidea insecta coleoptera |
| topic | insect sperm ultrastructure basal Tenebrionoidea sperm looping |
| url | https://www.mdpi.com/2075-4450/13/5/485 |
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