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Issue: Vol. 5389 No. 5: 22 Dec. 2023
Type: Article
Published: 2023-12-22
DOI: 10.11646/zootaxa.5389.5.2
Page range: 545-562
Abstract views: 1314
PDF downloaded: 13

Molecular delimitation of the seasonal killifishes of the Hypsolebias antenori species group (Cyprinodontiformes, Rivulidae), with description of two new species from the Caatinga coastal basins, northeastern Brazil

Laboratório de Ictiologia Sistemática e Evolutiva; Departamento de Botânica e Zoologia; Universidade Federal do Rio Grande do Norte; Lagoa Nova; 59078-970 Natal; RN; Brazil
Laboratório de Ecologia Aplicada e Conservação; Departamento de Sistemática e Ecologia; Centro de Ciências Exatas e da Natureza; Programa de Pós-Graduação em Ciências Biológicas; Universidade Federal da Paraíba; Campus I; Cidade Universitária; 58051-900 João Pessoa; PB; Brazil
Base Avançada do Centro Nacional de Pesquisa e Conservação de Cavernas (CECAV) no Rio Grande do Norte; Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio). Av. Alexandrino de Alencar 1399; Tirol; 59015-350; Natal; RN; Brazil
Laboratório de Ictiologia Sistemática e Evolutiva; Departamento de Botânica e Zoologia; Universidade Federal do Rio Grande do Norte; Lagoa Nova; 59078-970 Natal; RN; Brazil
Pisces Endangered species Environmental impacts Integrative taxonomy Neotropical freshwater fishes São Francisco Interbasin water transfer

Abstract

Hypsolebia antenori is a seasonal killifish considered to be broadly distributed along the Caatinga’s basins of northeastern Brazil, with records in the coastal drainages of the rio Pacoti, rio Jaguaribe, córrego Virgílio and rio Apodi-Mossoró basins. Based on morphological characters and molecular phylogenetic reconstructions, it was possible to diagnose two new species and restrict H. antenori to the rio Jaguaribe basin. Hypsolebias gongobira new species is described from a temporary pool in the rio Pacoti basin in Ceará State, in syntopy with the species threatened H. longignatus. Hypsolebias bonita new species occurs in the floodplains of the rio Apodi-Mossoró basin and in the córrego Virgílio microbasin in the Furna Feia National Park, in Rio Grande do Norte State. We also discuss the conservation status of these new species and how the São Francisco Interbasin Water transfer, and the agricultural and urban expansion in the semiarid may be adversely affecting these seasonal killifishes.

 

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