Hisonotus piracanjuba, new species, is described from headwaters of the rio Paranaiba, upper rio Parana. The sharing of a pair of rostral plates in the anterior part of the snout, the supra-opercular plate receiving the laterosensory canal from the compound pterotic before the preopercle, and paired fenestrae in the anterior portion of the basipterygium, suggests a close phylogenetic relationship among H. insperatus, H. luteofrenatus and the new species.
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Pontificia Univ Catolica Rio Grande do Sul, Lab Sistemat Vertebrados, BR-90619900 Porto Alegre, RS, BrazilPontificia Univ Catolica Rio Grande do Sul, Lab Sistemat Vertebrados, BR-90619900 Porto Alegre, RS, Brazil
Calegari, Barbara B.
Reis, Roberto E.
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Pontificia Univ Catolica Rio Grande do Sul, Lab Sistemat Vertebrados, BR-90619900 Porto Alegre, RS, BrazilPontificia Univ Catolica Rio Grande do Sul, Lab Sistemat Vertebrados, BR-90619900 Porto Alegre, RS, Brazil
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Pontificia Univ Catolica Rio Grande do Sul, Lab Ictiol, BR-90619900 Porto Alegre, RS, BrazilPontificia Univ Catolica Rio Grande do Sul, Lab Ictiol, BR-90619900 Porto Alegre, RS, Brazil