2021
DOI: 10.1590/1982-0224-2020-0110
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Abstract: The Hoplias malabaricus group encompasses six valid species and still is believed to harbors cryptic diversity. In this work, an integrative approach including morphological, DNA barcoding, and cytogenetic considerations was conducted to characterize a population of H. malabaricus from the Amazon basin that was recently allocated in the same mitochondrial lineage with H. misionera, a species originally described from La Plata basin. The DNA barcoding analysis revealed that the Amazon population nested together… Show more

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Cited by 5 publications
(4 citation statements)
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“…Differences in morphology among populations are common in nature as those detected by Guimarães et al . (2021) for Hoplias misionera Rosso et al ., 2016 in the Amazon basin, and by Shibatta and Hoffmann (2005) for Corydoras paleatus (Jenyns 1842) among others, since the environment can modify the shape of fish by accelerating or slowing the rate of development (Hubbs, 1926). The morphological variation may be caused by phenotypic plasticity or by genetic differences between populations, but determining the real causes is a difficult task (Tranah & Allen, 1999) and even more so in fish, which are more susceptible than any other vertebrate to environmentally induced morphological variations within and between populations (Allendorf & Phelps, 1987; Wimberger, 1992; Salomon et al ., 2015).…”
Section: Discussionmentioning
confidence: 99%
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“…Differences in morphology among populations are common in nature as those detected by Guimarães et al . (2021) for Hoplias misionera Rosso et al ., 2016 in the Amazon basin, and by Shibatta and Hoffmann (2005) for Corydoras paleatus (Jenyns 1842) among others, since the environment can modify the shape of fish by accelerating or slowing the rate of development (Hubbs, 1926). The morphological variation may be caused by phenotypic plasticity or by genetic differences between populations, but determining the real causes is a difficult task (Tranah & Allen, 1999) and even more so in fish, which are more susceptible than any other vertebrate to environmentally induced morphological variations within and between populations (Allendorf & Phelps, 1987; Wimberger, 1992; Salomon et al ., 2015).…”
Section: Discussionmentioning
confidence: 99%
“…This variation on pectoral-fin spine length among populations could represent a response to selective pressure under different environmental conditions. Differences in morphology among populations are common in nature as those detected byGuimarães et al (2021) for Hoplias misionera Rosso et al, 2016 in the Amazon basin, and byShibatta and Hoffmann (2005) for…”
mentioning
confidence: 86%
“…Therefore, our results corroborate the existence of the H. malabaricus complex of cryptic species inhabiting the Amazon Basin and adjacent drainages 2 , 5 , 7 , 8 . Some of these lineages were presented in previous studies 1 , 9 , 52 ; however, we could recognize six new putative species from the H. malabaricus complex (BINs: AAY4779, AAD3630, AEA5279, ADL3159, AEF4663 and AEA4944).…”
Section: Discussionmentioning
confidence: 75%
“…Despite its conspicuous karyotypic variation, cytogenetic markers have shown poor resolution for taxonomy and phylogenetic reconstruction 2 , 8 , 9 . Recent progress has been achieved with DNA barcoding coupled to morphological traits (integrative taxonomy), which starts to delineate a clearer picture of the evolutionary history of this group 15 , 17 , 52 .…”
Section: Discussionmentioning
confidence: 99%