A new armored catfish species of the genus Hypostomus Lacépède, 1803 (Siluriformes: Loricariidae) from the upper rio Xingu basin, Brazil

Zawadzki, Cláudio Henrique; Birindelli, José L. O.; Lima, Flávio C. T.

doi:10.1590/s1679-62252012000200003

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…The abdomen may or may not be covered with scales; the caudal fin is forked, with the larger lobe on top; there are two or three pre-dorsal scales; five rows of scales on the caudal peduncle; and a caudal keel with or without lateral scales (ARMBRUSTER, 2004). However, there is still no consensus about the taxonomy of Loricariidae, indicating the need for more specific studies aimed at its accurate identification (ZAWADZKI et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Infections of Hypostomus spp. by Trypanosoma spp. and leeches: a study of hematology and record of these hirudineans as potential vectors of these hemoflagellates

Corrêa

Oliveira

Tavares‐Dias

et al. 2016

Rev. Bras. Parasitol. Vet.

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Among Kinetoplastida, the Trypanosoma is the genus with the highest occurrence infecting populations of marine fish and freshwater in the world, with high levels of prevalence, causing influences fish health and consequent economic losses, mainly for fish populations in situation stress. This study investigated infections of Hypostomus spp. by Trypanosoma spp. and leeches, as well as blood parameters of this host in the network of tributaries of the Tapajós River in the state of Pará, in the eastern Amazon region in Brazil. Of the 47 hosts examined, 89.4% were parasitized by Trypanosoma spp. and 55.4% also had leeches attached around the mouth. The intensity of Trypanosoma spp. increased with the size of the host, but the body conditions were not influenced by the parasitism. The number of red blood cells, and hemoglobin, mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH), total number of leukocytes and thrombocytes showed variations and negative correlation with the intensity of Trypanosoma spp. in the blood of the hosts. The results suggest that the leeches were vectors of Trypanosoma spp. in Hypostomus spp.

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Section: Introductionmentioning

confidence: 99%

Infections of Hypostomus spp. by Trypanosoma spp. and leeches: a study of hematology and record of these hirudineans as potential vectors of these hemoflagellates

Corrêa

Oliveira

Tavares‐Dias

et al. 2016

Rev. Bras. Parasitol. Vet.

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“…Loricariidae is the largest family of the Siluriformes, accounting 974 valid species 2 , and has phylogenetic studies that shown constant systematic reallocations in its subfamilies and genus 1,[3][4][5][6] . The genus Hypostomus Lacépède, 1803 contains the greatest number of species in the Hypostominae subfamily (29 genera in total) 1,[7][8][9] , occurring in various freshwaters ecosystems throughout tropical and subtropical regions in South America 1 . Hypostomus possesses apomorphic morphological and cytogenetic characters among loricariids 10 , such as broad diploid number (2n) ranging (64 to 84 chromosomes) and, usually, multiple sites of rDNAs [11][12][13][14] , while some species have chromosomal characteristics considered to be plesiomorphic in the family, like sinteny in ribosomal genes families 10 .…”

Section: Introductionmentioning

confidence: 99%

Comparative Cytogenetics Among Three Sympatric Hypostomus Species (Siluriformes: Loricariidae): An Evolutionary Analysis in a High Endemic Region

Lorscheider

Oliveira

Dulz

et al. 2018

Braz. arch. biol. technol.

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The karyotypes of three armored catfish species (Loricariidae) from the Iguaçu river, southern of the Brazil, were compared using different techniques: C-banding, Ag-NOR and fluorescence in situ hybridization (FISH), which used 5S and 18S rDNAs and total Cot-1 fraction as probes. Hypostomus commersoni and Hypostomus derbyi presented 2n = 68 chromosomes, with karyotype formulae 12m+12sm+14st+30a and 12m+12sm+10st+34a, respectively; whereas Hypostomus myersi presented 2n = 74 chromosomes and 12m+16sm+12st+34a. The chromosomal localization of the Ag-NORs, 5S and 18S rDNAs differed in number of sites and chromosomal localization among the studied species. The total Cot-1 probe permitted the visualization of the repetitive DNA fraction in karyotypes of each species. Crosshybridizations using total Cot-1 probe revealed that these species have repetitive DNAs in common. However, this does not occur in H. commersoni in relation to the other species. The apparent karyotype similarity suggests a close relationship between the sympatric H. commersoni and H. derbyi species, but the small differences detected in the examined chromosomal markers indicate evolutionary divergence due to gene flow restriction among them. Hence, the present findings indicate different composition of repetitive sequences among studied species, which permit to infer its role in chromosomal differentiation of Hypostomus.

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“…Hypostomus Lacépède is the second most species-rich genus of the Siluriformes (Ferraris, 2007), comprising about 130 valid species (Garavello et al, 2012;Zawadzki et al, 2012). Ten species of Hypostomus are reported from Brazilian northeastern coastal drainages and eight are known to occur in the rio São Francisco basin, the largest drainage in the region.…”

Section: Introductionmentioning

confidence: 99%

A new dark-dotted species of Hypostomus Lacépède (Siluriformes: Loricariidae) from rio Paraguaçu, Bahia State, Brazil

Zanata¹,

Sardeiro²,

Zawadzki³

2013

Neotrop. ichthyol.

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A new species of Hypostomus Lacépède is described from the rio Paraguaçu basin, Bahia State, Brazil. The new species is distinguished from its congeners by having black and conspicuous dots on a pale background, which are similar in size on the head, trunk, and fins, along with ventral surface of head and abdomen naked or the latter plated exclusively on its anterior portion, absence of ridges on head and trunk, and caudal-fin lobes relatively similar in length. The new species further differs from the sympatric H. chrysostiktos by having seven branched dorsal-fin rays instead of 10-11 and represents the eleventh siluriform species endemic to the rio Paraguaçu basin.Uma espécie nova de Hypostomus Lacépède é descrita da bacia do rio Paraguaçu, estado da Bahia, Brasil. A espécie nova distingue-se de suas congêneres por apresentar corpo com manchas pretas e conspícuas sobre fundo claro de tamanho semelhante no tronco, cabeça e nadadeiras, além da superfície ventral da cabeça e abdômen nus ou apenas porção anterior do abdômen coberto por placas, ausência de quilhas na cabeça e no corpo e lobos da nadadeira caudal relativamente similares no comprimento. A espécie nova difere ainda da simpátrica H. chrysostiktos por ter sete raios ramificados na nadadeira dorsal ao invés de 10-11 e representa a décima primeira espécie de siluriforme endêmica da bacia do rio Paraguaçu.

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A new armored catfish species of the genus Hypostomus Lacépède, 1803 (Siluriformes: Loricariidae) from the upper rio Xingu basin, Brazil

Cited by 12 publications

References 9 publications

Infections of Hypostomus spp. by Trypanosoma spp. and leeches: a study of hematology and record of these hirudineans as potential vectors of these hemoflagellates

Infections of Hypostomus spp. by Trypanosoma spp. and leeches: a study of hematology and record of these hirudineans as potential vectors of these hemoflagellates

Comparative Cytogenetics Among Three Sympatric Hypostomus Species (Siluriformes: Loricariidae): An Evolutionary Analysis in a High Endemic Region

A new dark-dotted species of Hypostomus Lacépède (Siluriformes: Loricariidae) from rio Paraguaçu, Bahia State, Brazil

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