A new endangered species of Megaleporinus (Characiformes: Anostomidae) from the Rio de Contas basin, eastern Brazil

Autor(es)

Birindelli, Jose L. O. ^[1] ; Britski, Heraldo A. ^[2] ; Ramirez, Jorge L. ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Londrina, Dept Biol Anim & Vegetal, Museu Zool, Caixa Postal 10011, BR-86057970 Londrina, Parana - Brazil

^[2] Univ Sao Paulo, Museu Zool, Sao Paulo - Brazil

^[3] Univ Nacl Mayor San Marcos, Fac Ciencias Biol, Ciudad Univ, Lima, Peru.Birindelli, Jose L. O., Univ Estadual Londrina, Dept Biol Anim & Vegetal, Museu Zool, Caixa Postal 10011, BR-86057970 Londrina, Parana - Brazil

^[4] Univ Nacl Mayor San Marcos, Fac Ciencias Biol, Ciudad Univ, Lima - Peru

• Tipo de documento: Artigo Científico
• Fonte: Journal of Fish Biology; v. 96, n. 6, p. 1349-1359, JUN 2020.
• Citações Web of Science: 0

Resumo

A new species ofMegaleporinusis described from the Rio de Contas, a coastal drainage of eastern Brazil, and its phylogenetic relationships are studied using molecular data. The new species is unique among Anostomidae by possessing two exclusive features: an irregular dark longitudinal stripe from supracleithrum to second midlateral blotch and anterior cranial fontanel partially closed. In addition, the new species is diagnosed by having three premaxillary teeth, three dentary teeth, 37 or 38 scales in lateral line, 16 scale rows around caudal peduncle, three dark midlateral blotches on body, and red fins in life. The new species is closely related toM. obtusidensfrom the Sao Francisco basin, corroborating previous studies that indicated that the latter represents a species complex as currently defined. The new species exhibits the first rib enlarged in mature males, a feature described for some congeners. The new species is herein considered to be Endangered under the IUCN criteria. (AU)

• Processo FAPESP: 11/50282-7 - Inventário da fauna de Characiformes (Teleostei, Ostariophysi) da América do Sul
• Beneficiário: Naercio Aquino Menezes
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático