Ultrastructure of spermatozoa of spider crabs, family Mithracidae (Crustacea, Decapoda, Brachyura): Integrative analyses based on morphological and molecular data
| Autor: | Tatiana Magalhães, Fernando L. Mantelatto, Juan A. Bolaños, Fernando José Zara, Camila de O. Assugeni, Christopher C. Tudge |
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| Rok vydání: | 2017 |
| Předmět: |
Male
0106 biological sciences 0301 basic medicine Brachyura Zoology Context (language use) 010603 evolutionary biology 01 natural sciences Electron Transport Complex IV 03 medical and health sciences Phylogenetics Animals Phylogeny biology Phylogenetic tree Decapoda biology.organism_classification Spermatozoa Spermatogonia 030104 developmental biology Majoidea visual_art Spermatophore Ultrastructure visual_art.visual_art_medium Animal Science and Zoology Ribosome Subunits Large Operculum (gastropod) Developmental Biology |
| Zdroj: | Journal of Morphology. 278:1628-1646 |
| ISSN: | 0362-2525 |
| Popis: | Recent studies based on morphological and molecular data provide a new perspective concerning taxonomic aspects of the brachyuran family Mithracidae. These studies proposed a series of nominal changes and indicated that the family is actually represented by a different number and representatives of genera than previously thought. Here, we provide a comparative description of the ultrastructure of spermatozoa and spermatophores of some species of Mithracidae in a phylogenetic context. The ultrastructure of the spermatozoa and spermatophore was observed by scanning and transmission electron microscopy. The most informative morphological characters analysed were thickness of the operculum, shape of the perforatorial chamber and shape and thickness of the inner acrosomal zone. As a framework, we used a topology based on a phylogenetic analysis using mitochondrial data obtained here and from previous studies. Our results indicate that closely related species share a series of morphological characteristics of the spermatozoa. A thick operculum, for example, is a feature observed in species of the genera Amphithrax, Teleophrys, and Omalacantha in contrast to the slender operculum observed in Mithraculus and Mithrax. Amphithrax and Teleophrys have a rhomboid perforatorial chamber, while Mithraculus, Mithrax, and Omalacantha show a wider, deltoid morphology. Furthermore, our results are in agreement with recently proposed taxonomic changes including the separation of the genera Mithrax (previously Damithrax), Amphithrax (previously Mithrax) and Mithraculus, and the synonymy of Mithrax caribbaeus with Mithrax hispidus. Overall, the spermiotaxonomy of these species of Mithracidae represent a novel set of data that corroborates the most recent taxonomic revision of the family and can be used in future taxonomic and phylogenetic studies within this family. |
| Databáze: | OpenAIRE |
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