Karyotype variability in eight species of the subfamilies Loricariinae and Ancistrinae (Teleostei, Siluriformes, Loricariidae)

@article{Alves2003KaryotypeVI,
  title={Karyotype variability in eight species of the subfamilies Loricariinae and Ancistrinae (Teleostei, Siluriformes, Loricariidae)},
  author={A. L. Alves and Claudio Oliveira and F. Foresti},
  journal={Caryologia},
  year={2003},
  volume={56},
  pages={57 - 63}
}
Abstract Loricariidae is one of the largest fish families of the world, with about 650 species separated into six subfamilies. To date, cytogenetic data on only 56 species of this family are available. In the present study, the karyotypes of three Ancistrinae species and five Loricariinae species were studied. The lowest diploid number, 2n=38, was observed in Ancistrus n.sp. 1 (Ancistrinae) and the highest diploid number, 2n=70, was observed in Rineloricaria n.sp. (Loricariinae). The nucleolar… Expand
Comparative cytogenetic analysis of eleven species of subfamilies Neoplecostominae and Hypostominae (Siluriformes: Loricariidae)
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The cytogenetic characteristics partaken by the species of Neoplecostominee and Hypostominae analyzed reinforce the hypothesis that thespecies of both these subfamilies might belong to a natural group, which may represent the primitive condition for the family Loricariidae. Expand
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The first karyotype data for a population of the Ancistrus sp. Expand
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The gross cytogenetic characteristics observed among the Hypoptopomatinae species are similar to those observed in other primitive Lori-cariidae species suggesting that small changes, mainly paracentric and pericentric inversion were the main events in the karyotypic evolution of this fish group. Expand
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Comparative cytogenetics of two species of genus Scobinancistrus (Siluriformes, Loricariidae, Ancistrini) from the Xingu River, Brazil
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The karyotypic differences found between these two Scobinancistrus species can be used to identify them taxonomically, and may have functioned as a mechanism of post-zygotic reproductive isolation during the speciation process. Expand
Diversity and chromosomal evolution in the genus Ancistrus Kner, 1854 (Loricariidae: Ancistrini) from three hydrographic basins of Mato Grosso State, Brazil
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Data corroborate the hypotheses of reduction of diploid number in species with derived features such as presence of sex chromosomes and polymorphisms, besides allowing inferences about the evolutionary mechanisms and the ancestor karyotype that favored the diversification of this important genus in the tribe Ancistrini. Expand
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The family Loricariidae, with about 683 species, is one the largest fish families in the world. The subfamily Hypostominae was recently reviewed and is now divided in five tribes. With the mainExpand
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In the process of karyotype evolution of the group, the main type of chromosome rearrangements was possibly centric fissions, which may have been facilitated by the putative tetraploid origin of Hypostomus species. Expand
Chromosomal Polymorphism in Rineloricaria Lanceolata Günther, 1868 (Loricariidae: Loricariinae) of the Paraguay Basin (Mato Grosso do Sul, Brazil): Evidence of Fusions and Their Consequences in the Population
Abstract Rineloricaria is the most species-rich genus of the Loricariinae (armored catfish) with 65 valid species. However, the karyotype structure is known only for eight species in this group. ThisExpand
Chromosomal polymorphism in Rineloricaria lanceolata Günther, 1868 (Loricariidae: Loricariinae) of the Paraguay basin (Mato Grosso do Sul, Brazil): evidence of fusions and their consequences in the population.
TLDR
The data obtained confirm that diversification/karyotype evolution in Rineloricaria was marked by numerous chromosomal rearrangements which appear to be well tolerated in the panmitic population. Expand
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