2014
DOI: 10.1590/1982-0224-20140046
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Abstract: A new species of Polycentrus is described from the rio Negro, in Brazil. It is distinguished from P. schomburgkii by the presence of two dark postocular and one subocular band, all smaller than orbital diameter, blunt snout, isognathous mouth, reduction of the serrations on the lower edge of the lacrimal-spines ranging from zero to two tiny spines at the posterior end, intensely serrated edge of the interopercle, fully serrated posterior edge of the vertical arm of the preopercle, presence of five pungent oper… Show more

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Cited by 4 publications
(2 citation statements)
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“…); the extreme of this specialization is found in Monocirrhus with its petiole‐mimicking chin barbel (Eigenmann and Allen ). Due to their disjunct distributions, relationships among the leaffishes have been of interest in the study of continental biogeography (Cracraft ; Lundberg ), but despite their low diversity – Afronandus , Polycentropsis and Monocirrhus are monotypic while Polycentrus and Nandus have two and six valid species respectively (Ng ; Coutinho and Wosiacki ) – their phylogenetic affiliations have been difficult to ascertain, due in part to their ostensibly convergent appearances. Consequently, the systematic history of the leaffishes was described by Berra () as ‘tortured’ (p. 425), with genera having been classified and reclassified in several families on multiple occasions (Table ).…”
Section: Introductionmentioning
confidence: 99%
“…); the extreme of this specialization is found in Monocirrhus with its petiole‐mimicking chin barbel (Eigenmann and Allen ). Due to their disjunct distributions, relationships among the leaffishes have been of interest in the study of continental biogeography (Cracraft ; Lundberg ), but despite their low diversity – Afronandus , Polycentropsis and Monocirrhus are monotypic while Polycentrus and Nandus have two and six valid species respectively (Ng ; Coutinho and Wosiacki ) – their phylogenetic affiliations have been difficult to ascertain, due in part to their ostensibly convergent appearances. Consequently, the systematic history of the leaffishes was described by Berra () as ‘tortured’ (p. 425), with genera having been classified and reclassified in several families on multiple occasions (Table ).…”
Section: Introductionmentioning
confidence: 99%
“…Esta espécie ocorre nos rios e igarapés costeiros das Guianas e planícies Amazônica e do Orinoco (Cardona & Osinaga 2006, Menezes & Buckup 2007. Polycentrus schomburgkii ocorre nos rios costeiros da Venezuela, Trinidad, Guianas e do Estado do Amapá no Brasil (Coutinho & Wosiacki 2014), sendo também registrada na região de Salvador e na planície costeira do Rio de Janeiro, até o rio da Guarda na Baixada Fluminense (Menezes & Buckup 2007).…”
Section: Representatividade Em Riachosunclassified