Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae)
The monophyly and phylogenetic relationships among the members of Clade A characids (sensu Malabarba & Weitzman), later redefined and named as the Stevardiinae (sensu Mirande), have been primarily supported by traditional morphological and molecular data. Herein were examined, described and comp...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200016&lng=en&tlng=en |
| _version_ | 1819018786609561600 |
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| author | Clarianna Martins Baicere-Silva Katiane M. Ferreira Luiz R. Malabarba Ricardo C. Benine Irani Quagio-Grassiotto |
| author_facet | Clarianna Martins Baicere-Silva Katiane M. Ferreira Luiz R. Malabarba Ricardo C. Benine Irani Quagio-Grassiotto |
| author_sort | Clarianna Martins Baicere-Silva |
| collection | DOAJ |
| description | The monophyly and phylogenetic relationships among the members of Clade A characids (sensu Malabarba & Weitzman), later redefined and named as the Stevardiinae (sensu Mirande), have been primarily supported by traditional morphological and molecular data. Herein were examined, described and compared spermiogenesis and sperm ultrastructure of 12 species of the genera Boehlkea, Bryconacidnus, Bryconamericus, Creagrutus, Cyanocharax, Hemibrycon, Knodus, Odontostoechus, Piabina, and Rhinobrycon in order to evaluate possible phylogenetic signals and their potential use in recovering relationships of the Stevardiinae. All examined species demonstrated a nuclear rotation equal or less than 95º resulting in a lateral position of the double nuclear fossa and flagellum. In all species, sperm nuclei are slightly elongate toward the flagellum, the proximal centriole is partially inside the nuclear fossa and lies anterior and oblique to the distal centriole, and the midpiece is short and strongly asymmetric. All species analyzed herein and other species previously examined for these systems in the Stevardiinae share homologous sperm characteristics as evidenced by spermiogenesis, further supporting the monophyly of this clade. Spermatozoa of the Stevardiinae further show three morphotypes (M1, M2, M3) of arrangement of centrioles, flagellum, nucleus and midpiece, hypothesized as successively derived in a series of transformation from the most basal morphotype (M1). |
| first_indexed | 2024-12-21T03:24:57Z |
| format | Article |
| id | doaj.art-7175950376724a1f8ed38af0c5d79815 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-21T03:24:57Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-7175950376724a1f8ed38af0c5d798152022-12-21T19:17:36ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02249237739210.1590/S1679-62252011005000014S1679-62252011000200016Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae)Clarianna Martins Baicere-Silva0Katiane M. Ferreira1Luiz R. Malabarba2Ricardo C. Benine3Irani Quagio-Grassiotto4Universidade Estadual PaulistaUniversidade de São PauloUniversidade Federal do Rio Grande do SulUniversidade Estadual PaulistaUniversidade Estadual PaulistaThe monophyly and phylogenetic relationships among the members of Clade A characids (sensu Malabarba & Weitzman), later redefined and named as the Stevardiinae (sensu Mirande), have been primarily supported by traditional morphological and molecular data. Herein were examined, described and compared spermiogenesis and sperm ultrastructure of 12 species of the genera Boehlkea, Bryconacidnus, Bryconamericus, Creagrutus, Cyanocharax, Hemibrycon, Knodus, Odontostoechus, Piabina, and Rhinobrycon in order to evaluate possible phylogenetic signals and their potential use in recovering relationships of the Stevardiinae. All examined species demonstrated a nuclear rotation equal or less than 95º resulting in a lateral position of the double nuclear fossa and flagellum. In all species, sperm nuclei are slightly elongate toward the flagellum, the proximal centriole is partially inside the nuclear fossa and lies anterior and oblique to the distal centriole, and the midpiece is short and strongly asymmetric. All species analyzed herein and other species previously examined for these systems in the Stevardiinae share homologous sperm characteristics as evidenced by spermiogenesis, further supporting the monophyly of this clade. Spermatozoa of the Stevardiinae further show three morphotypes (M1, M2, M3) of arrangement of centrioles, flagellum, nucleus and midpiece, hypothesized as successively derived in a series of transformation from the most basal morphotype (M1).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200016&lng=en&tlng=enClade APhylogenySpermiogenesisSperm morphotype |
| spellingShingle | Clarianna Martins Baicere-Silva Katiane M. Ferreira Luiz R. Malabarba Ricardo C. Benine Irani Quagio-Grassiotto Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae) Neotropical Ichthyology Clade A Phylogeny Spermiogenesis Sperm morphotype |
| title | Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae) |
| title_full | Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae) |
| title_fullStr | Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae) |
| title_full_unstemmed | Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae) |
| title_short | Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae) |
| title_sort | spermatic characteristics and sperm evolution on the subfamily stevardiinae ostariophysi characiformes characidae |
| topic | Clade A Phylogeny Spermiogenesis Sperm morphotype |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200016&lng=en&tlng=en |
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