Full text
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| Author(s): |
Laura Rocha Prado
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) |
| Defense date: | 2010-10-20 |
| Examining board members: |
Sonia Aparecida Casari;
Luciano de Azevedo Moura;
Sergio Antonio Vanin
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| Advisor: | Sonia Aparecida Casari |
| Abstract | |
Cochabamba Bechyné, 1955 is a strictly neotropical genus, recorded only from Central and South America. This genus belongs to the Galerucinae diabroticines, a group which includes well studied taxa of economic importance, but has a poorly understood systematics. The present study provides the first revisional and cladistic treatment of this group, up to now composed by 10 species. The morphological study of all specimens followed the traditional methods of dissection and illustration of specimens (at least one male and female of every species, if available). The cladistic analysis was based on 15 terminal taxa and 58 morphological characters (including 5 referring to coloration and 13 to genitalia). Since there were no previous phylogenetic hypothesis for the relationships of this genus, the outgroups were selected among the representatives of the subfamily Galerucinae. The analysis using equally weighted characters produced 13 equally most-parcimonious trees (L=102), which resulted in a consensus diagram 108 steps long. The analysis conducted after sucessive weighting of characters found 3 most-parcimonious trees, which resulted in a consensus diagram 103 steps long (CI= 74; RI= 60). According to the observed topologies, Cochabamba as previously defined is a merophyletic group. To recover its monophyly, the taxon C. volxemi must be transferred back to genus Paranapiacaba Bechyné, 1955 (reinstated combination) and Diabrotica rufolimbata (new combination) included into the genus. An identification key to species is presented, as well as the redescription of all 11 Cochabamba species, including the description of a new species. Maps showing the geographic distribution of the species are also presented, based on the labels of studied material and data collected from literature. (AU) | |
| FAPESP's process: | 08/02166-5 - Taxonomy and cladistic analysis of Cochabamba Bechyné (Coleoptera, Chrysomelidae, Galerucinae) |
| Grantee: | Laura Rocha Prado |
| Support Opportunities: | Scholarships in Brazil - Master |