Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?

Chromosome polymorphism of heterochromatin and nucleolar regions in two populations of the fish Astyanax bockmanni (Teleostei: Characiformes)

The family Characidae, order Characiformes, is one of the most numerous and diverse families of freshwater fishes in South America (Nelson, 2006), consisting of approximately 597 recognized species (Buckup et al., 2007). The genus Astyanax, a speciose group of Neotropical characids, comprises about 86 valid species (Lima et al., 2003) that occur in diverse habitats within freshwater drainages f...

Diversity of Nematodes of Red-tail-lambari Astyanax Aff. Paranae (teleostei: Characidae) from Polluted Sites of a Tropical River System Diversidad De Los Nematodos De Tetra Cola Roja Astyanax Aff. Paranae (teleostei: Characidae) De Sitios Contaminados De Un Sistema De Río Tropical

Chromosomal microstructure diversity in three Astyanax (Characiformes, Characidae) species: comparative analysis of the chromosomal locations of the 18S and 5S rDNAs.

The species of genus Astyanax is widely distributed in freshwater neotropical zones. Astyanax is considered to be taxonomically confused, similar to other genera placed incertae sedis in Characidae. The cytogenetics of this genus is well characterized; species vary widely in diploid number, from 2n=36 chromosomes in Astyanax schubarti to 2n=50 for most species studied. The size, number, and pos...

Cytogenetic divergence in two sympatric fish species of the genus Astyanax Baird and Girard, 1854 (Characiformes, Characidae) from northeastern Brazil

The fish genus Astyanax is widespread throughout the Neotropical region and is one of the most species-rich genera of the Characiformes. Cytogenetic studies of Astyanax have revealed marked intra- and interspecific diversity, with the identification of various species complexes. In this report, we describe the karyotypic structure of two sympatric species of Astyanax (Astyanax sp. and Astyanax ...

Karyotypic diversity among three species of the genus Astyanax (Characiformes: Characidae).

The group Incertae sedis within the Characidae family currently includes 88 genera, previously included in the subfamily Tetragonopterinae. Among them is the genus Astyanax comprising a group of species with similar morphology and widely distributed in the Neotropics. Thus, the present study aimed to analyze the karyotype diversity in Astyanax species from different watersheds by conventional G...