Two new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the rio Madeira basin, Brazil

Autor(es)

Caserta Tencatt, Luiz Fernando ^[1] ; Ohara, Willian Massaharu ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Maringa, Programa Posgrad Ecol Ambientes Aquat Continentai, Av Colombo 5790, BR-87020900 Maringa, Parana - Brazil

^[2] Univ Sao Paulo, Museu Zool, Caixa Postal 42494, BR-04299970 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Neotropical Ichthyology; v. 14, n. 1 2016.
• Citações Web of Science: 7

Resumo

Abstract Two new species of Corydoras are described from the rio Madeira basin, Brazil. The intermediate long-snouted new species can be distinguished from its congeners by presenting the following combination of features: posterior margin of dorsal-fin spine with laminar serrations directed towards the origin of the spine; presence of two longitudinal black stripes on flanks; anterior portion of dorsal fin with sparse black chromatophores, not forming any conspicuous pattern; absence of a conspicuous black marbled coloration pattern on head; black spots on caudal fin, some spots arranged, forming transversal bars; and brownish dorsal-fin spine. The short-snouted new speciescan be distinguished from its congeners by the following combination of features: short mesethmoid; posterior laminar expansion of infraorbital 2 very reduced, not in contact with compound pterotic; two or three longitudinal black stripes on flanks; absence of an oblique or vertical black blotch across the eye; anterior portion of dorsal fin with sparse black chromatophores, not forming any conspicuous pattern; and ventral surface of trunk naked or covered by sparse platelets. (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