Results 81 to 90 of about 247 (103)
Two new species of spotted Hypancistrus from the Rio Negro drainage (Loricariidae, Hypostominae). [PDF]
Zookeys, 2016 Tan M, Armbruster JW.
europepmc +1 more source
Description of a new species of Parancistrus (Siluriformes; Loricariidae) from the rio Xingu, Brasil [PDF]
, 2005 Pydaniel, Lúcia Helena Rapp +1 more
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Chromosome polymorphism in Ancistrus cuiabae Knaack, 1999 (Siluriformes: Loricariidae: Ancistrini) [PDF]
Neotropical Ichthyology, 2009 Cytogenetic and FISH analyses were performed in 30 Ancistrus cuiabae specimens from a bay near the town of Poconé, in the Pantanal of Mato Grosso, Brazil. The observed diploid number was 2n = 34 chromosomes for both sexes and three distinct katyotypic formulae were found, namely cytotype A (20m, 8sm, 6st, Fundamental Number/FN = 68; 6 males and 11 ...
Sandra Mariotto +2 more
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Diversity and chromosomal evolution in the genus Ancistrus Kner, 1854 (Loricariidae: Ancistrini) from three hydrographic basins of Mato Grosso State, Brazil [PDF]
Neotropical Ichthyology, 2013 Cytogenetic analyses were carried out in 117 specimens of seven species of the genus Ancistrus from three hydrographic in Mato Grosso State: Paraguay, Araguaia-Tocantins and Amazon basins. Conventional cytogenetic techniques were used to obtain mitotic chromosomes.
Sandra Mariotto +2 more
exaly +5 more sources
Journal of Phylogenetics & Evolutionary Biology, 2018 Ancistrus is one of the most diverse genera in the Ancistrini tribe, with 64 nominal species. The group is characterized by high cytogenetic variability; the diploid number of chromosomes ranges from 2n = 34 to 2n = 54. Ancistrus is widely distributed in the basins of the Uruguay, Paraguay, and Amazonian rivers; the latter two regions show the greatest
Liano Centofante
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Cytogenetic and genome research, 2016
The karyotype of the Ancistrini catfish Ancistrus taunayi was analyzed by conventional (Giemsa staining, AgNOR staining and C-banding) and molecular cytogenetic (5S and 18S rDNA-FISH) methods. The diploid chromosome number was 2n = 50 (22 metacentrics + 10 submetacentrics + 10 subtelocentrics + 8 acrocentrics) for both sexes.
Jocicléia, Thums Konerat +4 more
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The karyotype of the Ancistrini catfish Ancistrus taunayi was analyzed by conventional (Giemsa staining, AgNOR staining and C-banding) and molecular cytogenetic (5S and 18S rDNA-FISH) methods. The diploid chromosome number was 2n = 50 (22 metacentrics + 10 submetacentrics + 10 subtelocentrics + 8 acrocentrics) for both sexes.
Jocicléia, Thums Konerat +4 more
openaire +2 more sources
Cytogenetic and Genome Research, 2019
The karyotypes and other chromosomal markers of 4 catfish species, namely <i>Lasiancistrus schomburgkii, Lasiancistrus </i>sp., <i>Araichthys</i><i>loro</i>, and <i>Megalancistrus</i> sp., members of a taxonomically complex and speciose tribe of catfishes Ancistrini, Hypostominae, were examined using ...
Sandra, Mariotto +4 more
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The karyotypes and other chromosomal markers of 4 catfish species, namely <i>Lasiancistrus schomburgkii, Lasiancistrus </i>sp., <i>Araichthys</i><i>loro</i>, and <i>Megalancistrus</i> sp., members of a taxonomically complex and speciose tribe of catfishes Ancistrini, Hypostominae, were examined using ...
Sandra, Mariotto +4 more
openaire +2 more sources
Two New Genera and Species of Ancistrini (Siluriformes: Loricariidae) from the Western Guiana Shield
Copeia, 2011Abstract Two new ancistrin genera and species are described from main channels and tributaries of the upper Orinoco River in Amazonas, Venezuela. Micracanthicus vandragti is black with white spots and distinguished by its small body-size, large gas-bladder capsules, and highly protrusible mandibles with short tooth cups and five to eight long teeth per
Nathan K. Lujan, Jonathan W. Armbruster
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Copeia, 2011
Abstract Etsaputu relictum, a new genus and species sister to all other Ancistrini, is described from the upper Maranon River in Northern Peru. Etsaputu relictum can be diagnosed from all other Hypostominae by having a coracoid with a serrated posterior margin of the posterior process, an opercle with a process extending ventrolaterally from the ...
Nathan K Lujan +2 more
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Abstract Etsaputu relictum, a new genus and species sister to all other Ancistrini, is described from the upper Maranon River in Northern Peru. Etsaputu relictum can be diagnosed from all other Hypostominae by having a coracoid with a serrated posterior margin of the posterior process, an opercle with a process extending ventrolaterally from the ...
Nathan K Lujan +2 more
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Zebrafish, 2016
The Ancistrus genus differs from other Ancistrini due to its wide karyotypic diversity, varied diploid numbers, differences in sex chromosomes, and large number of species, as well as its tendency to form small populations with low vagility. This study investigated the role of 5S and 18S rDNA and telomeric repetitive sequences in the evolution of the ...
Favarato, Ramon Marin +5 more
openaire +3 more sources
The Ancistrus genus differs from other Ancistrini due to its wide karyotypic diversity, varied diploid numbers, differences in sex chromosomes, and large number of species, as well as its tendency to form small populations with low vagility. This study investigated the role of 5S and 18S rDNA and telomeric repetitive sequences in the evolution of the ...
Favarato, Ramon Marin +5 more
openaire +3 more sources