Phylogenetic and taxonomic implications in the comparative myology of the Siluriformes and Gymnotiformes

• Grant number: 15/24709-4
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: April 01, 2016
• End date: December 19, 2016
• Field of knowledge: Biological Sciences - Zoology - Morphology of Recent Groups
• Principal Investigator: Mario Cesar Cardoso de Pinna
• Grantee: Luiz Antonio Wanderley Peixoto
• Supervisor: Lynne R. Parenti
• Host Institution: Museu de Zoologia (MZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Smithsonian National Museum of Natural History, United States
• Associated to the scholarship: 13/09926-3 - Taxonomic and phylogenetic implications in facial myology compared in Gymnotiformes and Siluriformes, BP.DR

Abstract

The aim of this project is to undertake a thorough analysis of the facial myology of the orders Gymnotiformes and Siluriformes. The study will primarily redefine hypotheses of homology and nomenclature of the facial myological complex with a detailed documentation of the phylogenetic variations relevant to each of the different subgroups. In the second phase, the results of the comparative study will be summarized into discrete characters and appropriately coded for incorporation into a phylogenetic analysis. This project will fill out a large gap in the anatomical knowledge of important components of the freshwater ichthyofauna and assist in the understanding of their diversity and evolution. It will be based on the material deposited in collections of Brazilian and foreign Institutions and will include representatives of the majority of phylogenetically relevant subgroups in the Siluriformes and Gymnotiformes. As outgroups, phylogenetically basal taxa of Characiformes and Cypriniformes families, will be included. The descriptive part of this work will include illustration of all relevant structures, using modern techniques of anatomical illustration. Later, these characters will be added to currently available morphological matrices to generate hypotheses of phylogenetic relationships with a wider empirical basis. The overall results of this work will serve as a relevant contribution to the understanding of the facial myological complex, which is of central importance to the diversification of these principal components of the freshwater ichthyofauna. This will aid in the elucidation of the phylogenetic relationships at different levels within these orders.

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GUSTAVO A. BALLEN; MURILO N. L. PASTANA; LUIZ A. W. PEIXOTO. A new species of Farlowella (Siluriformes: Loricariidae) of the F. nattereri species-group from the rio Xingu basin, Mato Grosso, Brazil, with comments on Farlowella jauruensis , a poorly-known species from the upper rio Paraguai basin. Neotropical Ichthyology, v. 14, n. 3, 2016-09-30. (11/50282-7, 13/09926-3, 15/24709-4, 16/02253-1)

DUTRA, GUILHERME MOREIRA; WANDERLEY PEIXOTO, LUIZ ANTONIO; DE SANTANA, CARLOS DAVID; WOSIACKI, WOLMAR BENJAMIN. A new species of Eigenmannia Jordan & Evermann (Teleostei: Gymnotiformes: Sternopygidae) from Rio Ventuari, Venezuela. Zootaxa, v. 4422, n. 1, p. 132-140, MAY 22 2018. (16/19075-9, 13/09926-3, 15/24709-4)

BALLEN, GUSTAVO A.; PASTANA, MURILO N. L.; PEIXOTO, LUIZ A. W.. A new species of Farlowella (Siluriformes: Loricariidae) of the F. nattereri species-group from the rio Xingu basin, Mato Grosso, Brazil, with comments on Farlowella jauruensis, a poorly-known species from the upper rio Paraguai basin. Neotropical Ichthyology, v. 14, n. 3, 2016. (11/50282-7, 14/11558-5, 15/24709-4, 16/02253-1, 13/09926-3)

LUIZ A. W. PEIXOTO; BRANDON T. WALTZ. A new species of the Eigenmannia trilineata (Gymnotiformes: Sternopygidae) species group from the río Orinoco basin, Venezuela. Neotropical Ichthyology, v. 15, n. 1, 2017-03-30. (13/09926-3, 15/24709-4)

PEIXOTO, LUIZ ANTONIO W.; WOSIACKI, WOLMAR B.. Eigenmannia besouro, a new species of the Eigenmannia trilineata species-group (Gymnotiformes: Sternopygidae) from the rio Sao Francisco basin, northeastern Brazil. Zootaxa, v. 4126, n. 2, p. 262-270, JUN 17 2016. (13/09926-3, 15/24709-4, 11/50282-7)