Integrative taxonomy reveals two new cryptic species of Hyphessobrycon Durbin, 1908 (Teleostei: Characidae) from the Maracaçumé and middle Tocantins River basins, Eastern Amazon region

  • Erick Cristofore Guimarães Universidade Federal do Maranhão, Programa de Pós-Graduação em Biodiversidade e Biotecnologia da Amazônia Legal. Av. dos Portugueses 1966, Cidade Universitária do Bacanga, CEP 65080-805, São Luís, MA, Brazil
  • Pâmella Silva de Brito Universidade Federal do Maranhão, Programa de Pós-Graduação em Biodiversidade e Biotecnologia da Amazônia Legal. Av. dos Portugueses 1966, Cidade Universitária do Bacanga, CEP 65080-805, São Luís, MA, Brazil
  • Pedro Henrique Negreiros Bragança South African Institute for Aquatic Biodiversity, Private Bag 1015, Grahamstown, 6140, South Africa
  • Jadson Pinheiro Santos Universidade Federal do Maranhão, Programa de Pós-Graduação em Biodiversidade e Biotecnologia da Amazônia Legal. Av. dos Portugueses 1966, Cidade Universitária do Bacanga, CEP 65080-805, São Luís, MA, Brazil. Universidade Estadual do Maranhão, Laboratório de Ictiofauna e Piscicultura Integrada, Centro de Ciências Agrárias, Campus Paulo VI, avenida Lourenço Vieira da Silva, n. 1000, bairro Jardim São Cristóvão, CEP 65055-310, São Luís, MA, Brazil
  • Axel Makay Katz Universidade Federal do Rio de Janeiro, Laboratório de Sistemática e Evolução de Peixes Teleósteos, Departamento de Zoologia, Instituto de Biologia, Cidade Universitária, CEP 21941-599. Rio de Janeiro, RJ, Brazil
  • Luis Fernando Carvalho Costa Universidade Federal do Maranhão, Departamento de Biologia, Laboratório de Genética e Biologia Molecular, Av. dos Portugueses 1966, Cidade Universitária do Bacanga, CEP 65080-805, São Luís, MA, Brazil
  • Felipe Polivanov Ottoni Universidade Federal do Maranhão, Laboratório de Sistemática e Ecologia de Organismos Aquáticos, Centro de Ciências Agrárias e Ambientais, Centro de Ciências Agrárias e Ambientais (CCAA), campus de Chapadinha, BR-222, KM 04, S/N, Boa Vista, CEP 65500-000, Chapadinha, MA, Brazil
DOI: https://doi.org/10.5852/ejt.2020.723.1145
Keywords: ABGD, bPTP, DNA barcoding, GMYC, “Rosy tetra” clade

Abstract

Two new species, Hyphessobrycon frickei Guimarães, Brito, Bragança, Katz & Ottoni sp. nov. and H. geryi Guimarães, Brito, Bragança, Katz & Ottoni sp. nov., are herein described, based on seven different and independent species delimitation methods, and on molecular and morphological characters, making the hypothesis of these new species supported from an integrative taxonomy perspective. They belong to the “Rosy tetra” clade, which is mainly characterized by the presence of a dark brown or black blotch on the dorsal fin and the absence of a midlateral stripe on the body. These two new species are distinguished from the other members of this clade mainly by the arrangement, shape and color pattern of humeral and dorsal-fin spots, as well as by other characters related to scale counts and body pigmentation. The placement of the new species within the “Rosy tetra” clade was based on the combination of morphological character states mentioned above and corroborated by a molecular phylogenetic analysis using the mitochondrial gene cytochrome oxidase subunit 1. In addition, a new clade (here termed Hyphessobrycon copelandi clade) within the “Rosy tetra” clade is proposed based on molecular data, comprising H. copelandi, H. frickei sp. nov., H. geryi sp. nov. and a still undescribed species. Our results corroborate the occurrence of hidden species within the “Rosy tetra” clade, as suggested by previous studies.

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Published
2020-11-09
How to Cite
Guimarães, E. C., de Brito, P. S., Bragança, P. H. N., Santos, J. P., Katz, A. M., Carvalho Costa, L. F., & Ottoni, F. P. (2020). Integrative taxonomy reveals two new cryptic species of Hyphessobrycon Durbin, 1908 (Teleostei: Characidae) from the Maracaçumé and middle Tocantins River basins, Eastern Amazon region. European Journal of Taxonomy, 723(1), 77-107. https://doi.org/10.5852/ejt.2020.723.1145
Issue
Vol. 723 (2020)
Section
Research article

Copyright (c) 2020 Erick Cristofore Guimarães, Pâmella Silva de Brito, Pedro Henrique Negreiros Bragança, Jadson Pinheiro Santos, Axel Makay Katz, Luis Fernando Carvalho Costa, Felipe Polivanov Ottoni

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