A new species of Hisonotus (Siluriformes, Loricariidae) from rio São Francisco basin, Brazil

Abstract

A new species of Hisonotus is described from the rio São Francisco basin. The new species can be distinguished from congeners by having (1) a unique coloration pattern of caudal fin with one black spot extending from its origin to the ventral lobe and two dark spots at the end of the lobe’s rays; (2) odontodes forming longitudinally aligned rows on head and trunk; (3) a functional V-shaped spinelet; (4) a single rostral plate at the tip of the snout; (5) by lacking contrasting dark geometric spots on the anterodorsal region of the body; (6) a lower caudal-peduncle depth; and (7) lower counts of the lateral median plates and (8) higher premaxillary and dentary teeth. The new species is the second described species of the genus Hisonotus in the rio São Francisco basin. It was found inhabiting the marginal vegetation of the rio São Francisco and three of its tributary, rio das Velhas, rio Paraopeba and rio Formoso.

Hisonotus devidei, a new species from the São Francisco basin, Brazil (Siluriformes: Loricariidae)

“…Hisonotus devidei is the fourth species of the genus described from the Rio São Francisco basin, after H. bocaiuva (Roxo et al, ), H. vespuccii (Roxo et al, ) and H. alberti (Roxo et al, ). Interestingly, H. alberti and H. vespuccii appear to have broad distributions whereas H. bocaiuva and H. devidei appear to be more restricted within small drainages where they occur (Fig.…”

“…Three currently recognized species of Hisonotus occur in the Rio São Francisco: Hisonotus bocaiuva Roxo et al, from the right tributary Rio Verde Grande (Roxo et al, ), Hisonotus vespuccii Roxo et al, from the Rio São Francisco main channel and its tributaries, Rio Paraopeba, Rio das Velhas and Rio Corrente (Roxo et al, ) and Hisonotus alberti Roxo et al, from the upper Rio São Francisco and upper Rio Paraná (Roxo et al, ). Here we describe a fourth species of Hisonotus from the middle Rio São Francisco that was discovered during a recent expedition to the Rio Pandeiros in northern Minas Gerais, central Brazil.…”

“…Several phylogenetic studies corroborate the non-monophyly of Hisonotus (Cramer et al, 2011;Martins et al, 2014;Roxo et al, 2014a;Silva et al, 2016). Even so, approximately 20 species were described only in the past 10 years (Britski & Garavello, 2007;Carvalho et al, 2008;Carvalho & Reis, 2009;Carvalho & Reis, 2011;Carvalho & Datovo, 2012;Martins & Langeani, 2012;Roxo et al, 2013Roxo et al, , 2014bRoxo et al, , 2015Roxo et al, , 2016Silva et al, 2014) increasing the total number to 31 species. Hisonotus species are distributed along the Rio Uruguay, coastal drainages of Brazil from Laguna dos Patos to Rio Vaza Barris in Bahia, upper Rio Paraná, the Rio São Francisco and southern tributaries of the Amazon Basin such as the Rio Aripuanã-Madeira, Rio Arinos-Tapajós and Rio Xingu (Britski & Garavello, 2007;Carvalho & Reis, 2011;Carvalho & Datovo, 2012;Silva et al, 2014).…”

Ficha de Hisonotus vespuccii

“…Estados Minas Gerais Biomas Caatinga, Cerrado, Mata Atlântica Bacias Hidrográficas Sub-bacia São Francisco Alto, Sub-bacia São Francisco Médio Endêmica do Brasil: Sim Hisonotus vespuccii é descrita da bacia do rio São Francisco, no estado de Minas Gerais, Brasil. Existem registros da espécie nos rios das Velhas, Paraopeba e Formoso, na bacia do rio São Francisco, no estado de Minas Gerais (Roxo et al, 2015).…”

“…Instituto Chico Mendes de Conservação da Biodiversidade -ICMBio Processo de Avaliação do Risco de Extinção da Fauna Brasileira Hisonotus vespuccii pode ser encontrado associado a vegetação marginal(Roxo et al, 2015). Hisonotus vespuccii parece ser abundante ao longo de toda a bacia do rio São Francisco.Instituto Chico Mendes de Conservação da Biodiversidade -ICMBio Processo de Avaliação do Risco de Extinção da Fauna Brasileira Bruno Francelino de Melo, Bárbara Calegari, Carla Simone Pavanelli, Carlos Bernardo Mascarenhas Alves, Danilo Caneppele, Fernando Cesar Paiva Dagosta, Frank Raynner Vasconcelos Ribeiro, Fábio Vieira, Jansen Zuanon, Karina Carvalho Fernandes Ferreira, Leandro Melo de Sousa, Lucia Helena Rapp Py-Daniel, Luiz Fernando Duboc da Silva, Marcelo Salles Rocha, Pablo Cesar Lehmann Albornoz, Paulo Andreas Buckup, Paulo dos Santos Pompeu, Priscila Camelier de Assis Cardoso, Renata Bartolette de Araujo, Renata Rúbia Ota, Renildo Ribeiro de Oliveira, Ricardo Macedo Correa e Castro, Roberto Esser dos Reis, Rosana Souza Lima, Telton Pedro Anselmo Ramos., Tiago Casarim Pessali, Tiago Pinto Carvalho, Willian Massaharu Ohara Validadores Harry Boos Junior, Rodrigo Silva Pinto Jorge Instituto Chico Mendes de Conservação da Biodiversidade -ICMBio Processo de Avaliação do Risco de Extinção da Fauna Brasileira…”