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Registros recuperados: 5
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A new characid fish, Hyphessobryconhexastichos (Characiformes: Characidae) from Chapada dos Parecis, Mato Grosso, Brazil Neotropical Ichthyology
Bertaco,Vinicius A.; Carvalho,Tiago P..
A new characid species, Hyphessobrycon hexastichos, is described from the upper rio Tapajós, Mato Grosso, Brazil. The new species is distinguished from all other Hyphessobrycon species by the presence of black zigzag longitudinal lines between longitudinal rows of scales in the lateral of body, maxilla with 3-5 teeth, i,6 pelvic-fin rays, 18-22 branched anal-fin rays, 4 scale rows above and 3 scale rows below of lateral line, lateral line with 9-13 perforated scales, and 33-35 scales in a longitudinal series.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical; Amazon basin; Rio Tapajós; Rio Juruena; Central Brazil; Taxonomy.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000300013
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A new genus and species of characid fish from the Amazon basin: the recognition of a relictual lineage of characid fishes (Ostariophysi: Cheirodontinae: Cheirodontini) Neotropical Ichthyology
Bührnheim,Cristina M.; Carvalho,Tiago P.; Malabarba,Luiz R.; Weitzman,Stanley H..
Amazonspinther dalmata, a new miniature characid from the streams of rio Purus and rio Madeira, right bank tributaries of the rio Amazonas, is described as a new genus and species of the subfamily Cheirodontinae. The unique characters of the new genus and species are the three remarkable black blotches on the base of the dorsal, anal, and caudal fins, the anteriormost proximal radial of the anal fin with an anteriorly extended lamina entering the abdominal cavity, and the extremely elongate caudal peduncle. The reduced number of ventral procurrent caudal-fin rays (7-9), and the hemal spines of only posterior one, two, or sometimes three caudal vertebrae directly articulating with the ventral procurrent caudal-fin rays further diagnoses the new taxon from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phylogeny; Biogeography; Miniaturization; Spintherobolus; Priocharax.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400016
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A new species of Hoplomyzon (Siluriformes: Aspredinidae) from Maracaibo Basin, Venezuela: osteological description using high-resolution computed microtomography of a miniature species Neotropical Ichthyology
Carvalho,Tiago P.; Reis,Roberto E.; Friel,John P..
ABSTRACT A new miniature species of banjo catfish of the genus Hoplomyzon is described from the Lake Maracaibo Basin in Venezuela. The new species is distinguished from all its congeners by the straight anterior margin of the mesethmoid (vs. a medial notch); a smooth and straight ventral surface of the premaxilla (vs. presence of bony knobs on the ventral surface of premaxilla); absence of teeth on dentary (vs. teeth present on dentary); configuration of ventral vertebral processes anterior to anal fin, which are composed of single processes anterior to anal-fin pterygiophore (vs. paired process); presence of several filamentous barbel-like structures on the ventral surface of head of adults (vs. small papillous structures in the ventral surface of head of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endemism; Ernstichthys intonsus; Miniaturization; Synapomorphy; Taxonomy.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100216
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Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography Neotropical Ichthyology
Carvalho,Tiago P.; Albert,James S..
We redescribe Iracema caiana, a monotypic genus of the gymnotiform electric fish family Rhamphichthyidae. Iracema is known only from the type series (holotype and three paratypes) collected from the rio Jauaperi, affluent to the rio Negro in the Amazon basin, and was never collected again. Previous morphological studies were limited to features of external morphology. To study the osteology of Iracema we examined two specimens of different sizes using high-resolution x-ray computed tomography, a non-invasive and non-destructive technique to visualize internal anatomical structures. We describe and illustrate the osteology of Iracema caiana, and present data on morphometrics and external morphology. Contrary to previous hypotheses we propose that Iracema is...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Biodiversity; Guiana Shield; Osteology; Rare fish; Rhamphichthys.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300001
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Two new species of the banjo catfish Bunocephalus Kner (Siluriformes: Aspredinidae) from the upper and middle rio São Francisco basins, Brazil Neotropical Ichthyology
Carvalho,Tiago P.; Cardoso,Alexandre R.; Friel,John P.; Reis,Roberto E..
Two new species of banjo catfish of the genus Bunocephalus are described from the upper and middle rio São Francisco basins of Brazil. Bunocephalus hartti is distinguished from all its congeners by the absence of serrations along the anterior margin of pectoral-fin spine in adults (vs. presence of serrations along the anterior margin of the spine). Bunocephalus minerim can be diagnosed from all congeners,except B. larai, by the absence of an epiphyseal bar between the paired frontals (vs. presence of the epiphyseal bar at least in adults). Bunocephalus minerim is distinguished from B. larai and other congeners, except B. chamaizelus , by having nine principal caudal-fin rays (vs. 10 principal caudal-fin rays).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Endemism; Neotropical; Systematics; Taxonomy.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300499
Registros recuperados: 5
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