The role of the chromosomal rearrangements in the evolution and speciation of Elopiformes fishes (Teleostei; Elopomorpha)

Characterization of a new cytotype and ocurrence of a B microchromosome in two spot astyanax, Astyanax bimaculatus Linnaeus, 1758 (Characiformes: Characidae)

“…In fact, there are many indications of chromosomal rearrangements in the analysed specimens, such as centric fusions and pericentric and paracentric inversions, which in turn become a factor that can significantly contribute to the speciation process (De Sousa et al, 2021). In this sense, even though populations of A. bimaculatus…”

“…In fact, there are many indications of chromosomal rearrangements in the analysed specimens, such as centric fusions and pericentric and paracentric inversions, which in turn become a factor that can significantly contribute to the speciation process (De Sousa et al ., 2021). In this sense, even though populations of A. bimaculatus with different cytotypes were phylogenetically close, the chromosomal differences observed indicate that each population probably had evolved independently, where chromosomal rearrangements had played a crucial role in such diversification.…”

Exploring the Diversity of Elopidae (Teleostei; Elopiformes) Using DNA Barcoding Analysis

“…Elopidae comprises seven valid species in the single genus Elops and is the most diverse group within the Elopiformes [1,2]. Elopidae includes marine and estuarine fishes that are found globally in tropical and subtropical regions and are mostly allopatric in distribution, although some species may be sympatric [1][2][3][4].…”

“…Elopidae comprises seven valid species in the single genus Elops and is the most diverse group within the Elopiformes [1,2]. Elopidae includes marine and estuarine fishes that are found globally in tropical and subtropical regions and are mostly allopatric in distribution, although some species may be sympatric [1][2][3][4]. For example, according to Adams et al [1], Elops senegalensis (Regan, 1909) and Elops lacerta (Valenciennes, 1847) are sympatrically distributed in the eastern Atlantic, while Elops saurus (Linnaeus, 1766) and Elops smithi (McBride et al, 2010) are allopatrically distributed in the west, with an overlap of these two species observed in the Gulf of Mexico and southeastern United States.…”

“…However, these diagnostic criteria are subject to problems and inconsistencies, such as the overlap in the number of vertebrae in some species, which can lead to taxonomic errors. In addition, the values for genetic distance based on the cytb gene obtained in previous studies vary widely (Table 1) [1][2][3][4][5][6][7][8]. The taxonomy of Elops species has been the subject of debate in recent years, given their wide distribution and highly conserved anatomical features [3][4][5].…”