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| Author(s): |
Júlio César de Oliveira Santana
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia |
| Defense date: | 2014-06-27 |
| Examining board members: |
Irani Quagio Grassiotto;
Mônica de Toledo Piza Ragazzo;
Flávio César Thadeo de Lima;
Luciana Bolsoni Lourenço;
Luiz Roberto Malabarba
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| Advisor: | Irani Quagio Grassiotto; Daniela Calcagnotto |
| Abstract | |
The superfamily Erythrinoidea is one of eight superfamilies within the order Characiformes and was proposed to include a monophyletic group composed of the Neotropical fish families Ctenoluciidae, Erythrinidae and Lebiasinidae, and African family Hepsetidae. Current phylogenetic studies based on morphological data, such as osteology and morphology of soft structures, and molecular data have refuted the hypothesis of monophyly of this group. In addition, the suprafamilial relationships in Erythrinoidea have diverged among the authors. In combination with more traditional characters, the analyses of the ultrastructure of sperm ontogeny and its final shape have become an interesting source of characters to complement phylogenetic studies. The goal of this study was to perform a phylogenetic analysis to test the monophyly of the Erythrinoidea and to assess the phylogenetic position of the family Crenuchidae, a group supposed to be closely related to the superfamily. The phylogenetic analyses were performed using molecular and morphological data separately, and in a combined approach (total evidence) through the Parsimony method. The ultrastructure of the spermiogenesis and the sperm shape of Erythrinoidea genera, plus the family Crenuchidae and other species possibly related to the superfamily were described and coded in a matrix data. In all three analyses Erythrinoidea was not recovered as monophyletic. The family Crenuchidae was placed in a basal position within the suborder Characoidei in molecular and total evidence analysis, and was not closely related to the Erythrinoidea. The analyses using only molecular data and total evidence showed a very similar topology for the more inclusive relationship levels. The support values were higher for the total evidence tree when compared to the one resulting of only molecular data possibly pointing to a positive influence of the combination of the spermatic cell data in phylogenetic analyses (AU) | |
| FAPESP's process: | 10/01626-2 - Analysis of ultrastructural characteristics of spermiogenesis and spermatozoa of representatives of the superfamily Erythrinoidea (Teleostei: Characiformes): a phylogenetic approach |
| Grantee: | Júlio César de Oliveira Santana |
| Support Opportunities: | Scholarships in Brazil - Doctorate |