Two new miniature species of the fish genus Priocharax from the Rio Tapajos and Amazonas drainages, Para, Brazil (Teleostei: Characiformes: Characidae)

Autor(es)

Mattox, George M. T. ; Lima, Flavio C. T. ; Britz, Ralf ; Souza, Camila S. ; Oliveira, Claudio

• Tipo de documento: Artigo Científico
• Fonte: VERTEBRATE ZOOLOGY; v. 74, p. 18-pg., 2024-09-12.

Resumo

The miniature fish genus Priocharax currently comprises seven valid species: P. ariel, P. britzi, P. marupiara, P. nanus, P. pygmaeus, P. toledopizae and P. varii. Except for P. ariel and P. pygmaeus, all the species are endemic to Brazil. Priocharax is characterized by several paedomorphic features such as reductions in the laterosensory system, number of fin rays, and ossification of parts of the skull. The most striking reductive character of Priocharax is the larval rayless pectoral fin in which most of its ossified endoskeletal elements are absent. We describe herein two new species of Priocharax from the vicinity of Santarem municipality, Para state, Brazil. Both new species are distinguished from each other and from congeners by a combination of morphological features (i.e., osteological, morphometric, and meristic data) and molecular information (i.e., DNA barcode). We also present an updated maximum likelihood tree which now includes all nine species of Priocharax. (AU)

• Processo FAPESP: 17/01970-4 - Integrando dados morfológicos e moleculares no estudo taxonômico e filogenético do peixe miniatura Priocharax Weitzman & Vari (Teleostei, Characiformes, Characidae)
• Beneficiário: George Mendes Taliaferro Mattox
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 17/06551-0 - Characinae (Actinopterygii: Characiformes: Characidae): identificação molecular e estudo das relações filogenéticas entre espécies
• Beneficiário: Camila da Silva de Souza
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/13433-6 - Filogenia e identificação molecular de peixes da superordem Ostariophysi (Chordata: Actinopterygii) utilizando abordagens genômicas
• Beneficiário: Claudio de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático