The monophyly of Crenuchinae and description of two new species of Poecilocharax (Teleostei: Crenuchidae) based on phenotypic and genotypic evidence

Autor(es)

Ohara, Willian M. ; Pastana, Murilo ; Camelier, Priscila

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY; v. 197, n. 2, p. 32-pg., 2022-05-16.

Resumo

Crenuchinae is a subfamily of the fish family Crenuchidae distributed in the Amazon Basin with pronounced sexual dimorphism and exuberant colour patterns. Recent fieldwork in the tributaries of the Rio Aripuana drainage, a large tributary of the Rio Madeira (Amazon Basin), resulted in the discovery of two distinctive, undescribed species of the crenuchin genus Poecilocharax, which are formally described herein, combining morphological and molecular data. These are the first representatives of Crenuchinae discovered after a gap of 57 years and the first records of Poecilocharax from the tributaries of the right bank of the Rio Amazonas draining the Brazilian crystalline shield. Based on a taxonomic review including all species of the subfamily, we provide an expanded morphological diagnosis for Crenuchinae. This now includes characteristics related to the lateral-line canals of head and body, the number of dorsal-fin rays and sexually dimorphic traits. In addition, we review previous characteristics used to diagnose Crenuchus and Poecilocharax, providing comments on their polarity and distribution across the subfamily. A dichotomous key is provided for the first time for species of Crenuchinae. (AU)

• Processo FAPESP: 16/03966-1 - Filogeografia comparada de peixes de água doce da Mata Atlântica: uma análise multilocus de representantes da família Characidae (Teleostei: Characiformes)
• Beneficiário: Priscila Camelier de Assis Cardoso
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/09321-5 - Characiformes miniaturas (Teleostei: Ostariophysi): evolução, diversidade e biogeografia
• Beneficiário: Manoela Maria Marinho Koh
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Jovens Pesquisadores
• Processo FAPESP: 13/22473-8 - Endemismo e análise biogeográfica dos peixes da Bacia do Rio Madeira
• Beneficiário: Willian Massaharu Ohara
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/19075-9 - Diversidade e evolução de Gymnotiformes (Teleostei, Ostariophysi)
• Beneficiário: Naercio Aquino Menezes
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/00840-6 - Especiação e biogeografia nos gêneros Glandulocauda Eigenmann e Mimagoniates Regan (Characiformes: Characidae: Glandulocaudinae)
• Beneficiário: Priscila Camelier de Assis Cardoso
• Modalidade de apoio: Bolsas no Brasil - Doutorado