Sperm morphology of predatory pirate bugs Amphiareus constrictus and Blaptostethus pallescens (Heteroptera: Anthocoridae) with phylogenetic inferences
| Autor: | Aline Beatriz Reis Santos, José Lino-Neto |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Systematic
0106 biological sciences 0301 basic medicine Axoneme Male General Physics and Astronomy 010603 evolutionary biology 01 natural sciences Anthocoridae Hemiptera Heteroptera 03 medical and health sciences Microscopy Electron Transmission Structural Biology Botany medicine Cimicomorpha Animals General Materials Science Acrosome Centrioles Cell Nucleus Microscopy biology Phylogenetic tree Cell Biology biology.organism_classification Mitochondria 030104 developmental biology medicine.anatomical_structure Evolutionary biology Sperm Head Sperm structure Nucleus |
| Zdroj: | LOCUS Repositório Institucional da UFV Universidade Federal de Viçosa (UFV) instacron:UFV |
| ISSN: | 1878-4291 |
| Popis: | The sperm morphology of two predatory bugs Amphiareus constrictus and Blaptostethus pallescens, representing the tribes Dufouriellini and Blasptostethini, respectively, was described using light and transmission electron microscopy. The spermatozoa of Amphiareus constrictus and Blaptostethus pallescens are fine and long, each measuring 216.6 μm and 181.0 μm in length, of which 37.0 μm and 11.6 μm, respectively, comprise the nuclei. When stained with DAPI (for DNA), the posterior half of the nucleus in B. pallescens exhibited low fluorescence, while in A. constrictus this feature was observed only in the last 6 μm. In both species, as in Heteroptera in general, the spermatozoa have, in the head region, an acrosome and nucleus, and in the flagellar region, an axoneme with 9 accessory tubules, 9 peripheral doublets and 2 central microtubules (9 + 9 + 2 microtubules), 2 mitochondrial derivatives (MDs), and a centriolar adjunct in the nucleus-flagellum transition. However, unlike most Heteroptera, in these species, the MDs are asymmetric, and the centriolar adjunct is quite long and encompasses completely the posterior nuclear end and the anterior tips of the MDs. These features are considered as derived, thus supporting the condition derived of Anthocoridae within Cimicomorpha. In addition, several traits of the spermatozoa of these two species easily distinguish one species (and probably a tribe) from the other; for example, the difference of formats in the MDs, and the long anterior projection of the centriolar adjunct parallel to the nucleus in B. pallescens. |
| Databáze: | OpenAIRE |
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