A new species ofCharacidium(Characiformes: Crenuchidae) from the rio Madeira basin, Brazil

Autor(es)

Zanata, Angela M. ^[1] ; Ohara, Willian M. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Bahia, Inst Biol, Rua Barao Jeremoabo 147, BR-40170115 Salvador, BA - Brazil

^[2] Univ Fed Rondonia, Dept Engn Pesca, Presidente Medici - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Fish Biology; v. 97, n. 6, p. 1681-1689, DEC 2020.
• Citações Web of Science: 1

Resumo

This study describesCharacidium nambiquara, a new species from the upper rio Guapore, rio Madeira basin, Brazil. The new species differs from most congeners by the presence of isthmus and area between the contralateral pectoral-fin bases completely naked. From congeners with some degree of scaleless ventral surface of the bodyC. nambiquaradiffers by having 10 circumpeduncular scales. The new species is also distinguished from congeners by the spotted colour pattern on body of the large-sized specimens and by having black dashes on all fins and conspicuous midlateral longitudinal dark stripe or conspicuous vertical bars absent.Characidium nambiquarafurther differs from most congeners by the presence of 34-36 pored scales on the lateral line, 3 horizontal scale rows above the lateral line and 3 horizontal scale rows from the lateral line to the midventral scale series. Remarks on intraspecific colour variation within the genus, not related to sexual dimorphism, are also provided. (AU)

• 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