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| Author(s): |
Clarianna Martins Baicere Silva
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: | 2013-08-23 |
| Examining board members: |
Irani Quagio Grassiotto;
Jose Lino Neto;
Ricardo Cardoso Benine;
Daniela Calcagnotto;
Flávio César Thadeo de Lima
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| Advisor: | Luiz Roberto Malabarba; Irani Quagio Grassiotto |
| Abstract | |
The family Characidae presents 16 subfamilies and ninety-two genera not reported to any subfamily and therefore considered incertae sedis. In this group there are numerous taxonomic / phylogenetic problems. Most of these genera were allocated in the subfamily Tetragonopterinae, but given the lack of evidence that Tetragonopterinae constitute a monophyletic group, remains the only genus Tetragonopterus in the subfamily. Genera incertae sedis in Characidae are a vast and heterogeneous group of fish, mostly small, abundant in rivers and other aquatic habitats of the Neotropics. Researches of relationships among the Characidae and consequently between the old Tetragonopterinae is based mainly in external morphollogical and osteological features and, more recently, molecular sequence data. It is known that reproductive characteristics may contain significant phylogenetic signals. So we proceeded from a phylogenetic analysis of reproductive data such as testicular structure, the type of spermiogenesis and sperm ultrastructure of representatives of some of the genera incertae sedis in Characidae, previously allocated to Tetragonopterinae and other Characiformes used as outgroup. The tree topology obtained was parcially congruent with the hypotheses exist for the group proving the usefulness of this type of data in relation to elucidate the evolutionary patterns in characid (AU) | |
| FAPESP's process: | 09/05237-3 - SPERMIOGENESIS AND ULTRASTRUCTURE IN THE "ROSY TETRA CLADE" (WEITZMAN E PALMER, 1997)AND THEIR PHYLOGENETIC MEANING |
| Grantee: | Clarianna Martins Baicere Silva |
| Support Opportunities: | Scholarships in Brazil - Doctorate |