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A new species of the Eigenmannia trilineata (Gymnotiformes: Sternopygidae) species group from the río Orinoco basin, Venezuela Neotropical Ichthyology
Peixoto,Luiz A. W.; Waltz,Brandon T..
ABSTRACT A new species of the Eigenmannia trilineata species group is described from the río Orinoco basin, Venezuela. The new species is distinguished from congeners by a unique set of characters including an ossified basibranchial 1; 198-217 anal-fin rays; suborbital depth, 21.3-26.1% HL; length of anterodorsal process of maxilla equal to the width of the posterior nostril; premaxilla with 17 teeth distributed in three rows; hyaline pectoral and anal fins; and number of scale series above lateral line, 9-10. It raises the number of species allocated to the Eigenmannia trilineata species group to 13 and the number of species within the genus to 18.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Electric-fishes; Taxonomy; Tuvira.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100207
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Genetic differentiation through dispersal and isolation in two freshwater fish species from coastal basins of Northeastern Brazil Neotropical Ichthyology
Abreu,João Marcelo S.; Waltz,Brandon T.; Albert,James S.; Piorski,Nivaldo M..
Abstract The coastal basins in Northeastern Brazil used in this study make up two different ecoregions for freshwater fishes (Amazonas estuary and coastal drainages, and Parnaiba) and two areas of endemism for Characiformes (Maranhão and Parnaíba), and exhibits a diversified yet poorly explored freshwater fish fauna. The population structure and biogeography of two migratory freshwater fish species that are commercially exploited from Maranhão and Parnaíba regions were herein analyzed. Molecular sequence data and statistical analyses were used to estimate haplotypes networks and lineage divergence times and correlated with hydrographic history of drainage and paleodrainages of the region. A total of 171 sequences was produced for both species, Schizodon...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Characiformes; Headwater capture; Paleodrainages; Phylogeography; Sea-level change.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300206
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