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| Author(s): |
Leandro Melo de Sousa
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) |
| Defense date: | 2010-11-19 |
| Examining board members: |
Mario Cesar Cardoso de Pinna;
Alberto Akama;
Heraldo Antonio Britski;
Marcelo Ribeiro de Britto;
Naercio Aquino Menezes
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| Advisor: | Mario Cesar Cardoso de Pinna |
| Abstract | |
The species of the subfamily Astrodoradinae was revised and a phylogenetic analysis performed. Twenty-one species, belonging to seven genera, are recognized as valid. Acanthodoras and Agamyxis, formely considered to be related to Platydoras,are included into Astrodoradinae. Anadoras regani is considered as a junior synonym of A. weddellii and a new species is described from the upper Araguaia. The genera Merodoras and Physopyxis are placed in synonym with Amblydoras,which has six valid species: A. affinis, A. ananas, A. bolivarensis, A. cristatus, A. lyra and A. nheco.Two new species of Astrodoras are described and occur syntopically in some places in the Amazon basin. Scorpiodoras calderonensis is reerected and its type locality elucidated as Tabatinga. Furthermore, a new species of Scorpiodoras is discribed from the middle rio Madeira. The cladistic analysis was performed based on 101 characters coded for 28 taxa and resulted in a single most parcimonious tree with 279 steps. The monophyly of Astrodoradinae is supported by seven non-exclusive synapomorphies: anterior cranial fontanel oval or circular, reduced number of ribs (eigth or less), ventral face of coracoid not completely covered by muscles, reduced number of vertebrae (34 or less), parhypural fused to hipural 1 and 2, infra-orbital 1 participating of orbit and third tympanic scute expanded. Anadoras is considered the most basal genus of Astrodoradinae, followed by (Acanthodoras + Agamyxis)(Amblydoras (Scorpiodoras (Hypodoras + Astrodoras))). (AU) | |
| FAPESP's process: | 06/04162-1 - Taxonomic review and phylogeny of Astrodoradinae (Siluriformes, Doradidae) |
| Grantee: | Leandro Melo de Sousa |
| Support Opportunities: | Scholarships in Brazil - Doctorate |