Paraphyly and evolutionary independent lineages in Gymnotus pantherinus (Gymnotiformes: Gymnotidae) in the Brazilian Atlantic Forest Coastal Streams

Baroni, Sabrina; Damasceno, Roberta Pacheco; Almeida-Toledo, Lurdes Foresti de

doi:10.1016/j.ympev.2021.107159

Cited by 2 publications

(4 citation statements)

References 83 publications

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“…Drainage (Poveda-Martinez et al, 2016). Indeed, other studies with freshwater fishes have shown that some coastal species had a recent origin of diversification, especially during the Pleistocene (e.g., Baroni et al, 2021;Santos et al, 2021;Wendt et al, 2019). Our results concur with these studies and show that a recent diversification may have occurred in C. bahiense during the Pleistocene (Figure 2).…”

Section: Species Limits and Taxonomic Implicationssupporting

confidence: 91%

“…Species of Characidium currently distributed in coastal basins (i.e., Characidium pterostictum and Characidium vidali [the only coastal species of Characidium evaluated in the work]) had their origins dated to more recent periods during Pliocene (5.5 Mya), from a vicariance event between Paraná River basin and Atlantic Coastal Drainage (Poveda‐Martinez et al, 2016). Indeed, other studies with freshwater fishes have shown that some coastal species had a recent origin of diversification, especially during the Pleistocene (e.g., Baroni et al, 2021; Santos et al, 2021; Wendt et al, 2019). Our results concur with these studies and show that a recent diversification may have occurred in C. bahiense during the Pleistocene (Figure 2).…”

Section: Discussionmentioning

confidence: 99%

“…The influence of coastal paleodrainages on the diversification of freshwater fishes took place mainly in the Quaternary, particularly the Pleistocene, when sea level fluctuations reshaped the connections between previously isolated rivers (Baroni et al, 2021;Thomaz & Knowles, 2020;Thomaz & Knowles, 2018). Although the importance of these processes is evident, it is still not clear how exactly both influenced the history of ichthyofauna diversification in northeastern Brazilian coastal basins (Barreto et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Coastal paleodrainages, in turn, are triggered by the retraction of sea level during glacial periods, which causes the coalescence of previously isolated basins (Dias et al, 2014; Thomaz & Knowles, 2018), creating dispersal routes for previously isolated freshwater species. The influence of coastal paleodrainages on the diversification of freshwater fishes took place mainly in the Quaternary, particularly the Pleistocene, when sea level fluctuations reshaped the connections between previously isolated rivers (Baroni et al, 2021; Thomaz & Knowles, 2020; Thomaz & Knowles, 2018). Although the importance of these processes is evident, it is still not clear how exactly both influenced the history of ichthyofauna diversification in northeastern Brazilian coastal basins (Barreto et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Past riverine connectivity effects in population structure and distribution of an endemic freshwater fish from northeastern Brazilian rivers: Phylogeographic, taxonomic, and conservation implications

Oliveira‐Silva,

Batalha‐Filho,

Camelier

et al. 2023

Freshwater Biology

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The coastal basins of eastern Brazil are influenced by geomorphologic and climatic changes that caused river captures and temporary paleo‐connections due to sea‐level oscillations. These two events can lead to isolation and connection among coastal rivers and have a strong influence on the distribution of freshwater fishes in this region. Characidium bahiense is a small fish species with a wide distribution, ranging from the coastal basins of the North Group of the Northeastern Mata Atlântica ecoregion to São Francisco and Parnaíba ecoregions. The allopatric distribution of C. bahiense associated with the possible morphological and molecular variations among geographically isolated populations stimulated this study. Here, we use an integrative approach, encompassing morphological and mitonuclear data, and paleodrainage reconstruction to better understand the evolutionary history of C. bahiense and to test the putative effects of the current configuration of basins and historical drainage rearrangements on the genetic structuring of the species. Our mitochondrial data show that C. bahiense is not a monophyletic species since the specimens from one locality are more closely related to Characidium cf. lagosantense than to other populations of C. bahiense. Multilocus analyses, however, recovered the monophyly of this species, although the molecular delimitation method considers each mitochondrial DNA lineages as a separated species. Overall, the morphological data revealed some intraspecific overlapping variation, suggesting that all specimens of C. bahiense are conspecific. Molecular analyses combined with geomorphological information suggest that the current distribution of C. bahiense is the result of climate change that directly affected river flow dynamics and recent riverine captures during the Pleistocene. The use of multiple data sources not only provides a more reliable interpretation of the evolutionary history of a species, but can also avoid arbitrary taxonomic decisions. Future phylogeographic studies involving other freshwater fish species with a similar distribution to C. bahiense are necessary to assist in understanding the scenarios presented here.

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