A new Hemigrammus from the upper Rio Vaupes, Colombia (Characiformes: Characidae), with a discussion on the presence of an enlarged urogenital papilla in the family

Autor(es)

Lima, Flavio C. T. ^[1] ; Urbano-Bonilla, Alexander ^[2] ; Prada-Pedreros, Saul ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas Adao Jose Cardoso, Museu Zool, Caixa Postal 6109, BR-13083863 Campinas, SP - Brazil

^[2] Pontificia Univ Javeriana, Fac Ciencias, Dept Biol, Lab Ictiol, Unidad Ecol & Sistemat UNESIS, Bogota - Colombia

• Tipo de documento: Artigo Científico
• Fonte: Journal of Fish Biology; v. 96, n. 4 FEB 2020.
• Citações Web of Science: 0

Resumo

Hemigrammus xaveriellus sp. nov. is described from the upper Rio Vaupes basin (Amazon basin), Departamento Guaviare, Colombia. It is distinguished from all congeners by the combination of the following characters: presence of a conspicuous, dark, longitudinal midlateral stripe extending along the body; presence of a conspicuous rounded, horizontally elongated humeral blotch anterior to the beginning of the dark midlateral stripe; seven scale rows between the dorsal fin and lateral line (vs. five to six); and five scale rows between the lateral line and pelvic-fin insertion (vs. three to four). The single mature male of He. xaveriellus possessed a well-developed urogenital papilla, an unusual feature among characids. The presence of an enlarged urogenital papilla in the family is discussed, and comments regarding the putative relationships of the new species are presented. (AU)

• Processo FAPESP: 13/20936-0 - Sistemática das piabas (gêneros Hemigrammus, Hyphessobrycon, Thayeria, Parapristella e Bryconella), com ênfase nas espécies do norte da América do Sul cis-andina
• Beneficiário: Flávio César Thadeo de Lima
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 11/51532-7 - Sistemática das piabas (gênero Hemigrammus, Hyphessobrycon, Parapristella e Bryconella), com ênfase nas espécies do norte da América do Sul cisandina
• Beneficiário: Flávio César Thadeo de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores