Phylogenomics of the Neotropical fish family Serrasalmidae with a novel intrafamilial classification (Teleostei: Characiformes)

Mateussi, Nadayca Thayane Bonani; Melo, Bruno F.; Ota, Rafaela P.; Roxo, Fábio Fernandes; Ochoa, Luz E.; Foresti, Fausto; Oliveira, Cláudio

doi:10.1016/j.ympev.2020.106945

Cited by 20 publications

(22 citation statements)

References 61 publications

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“…The present study contributes to the knowledge about Serrasalmidae cytogenetics, mainly concerning Myleini, including for the first time species of the genera Myloplus and Tometes ; and within Serrasalmini expanding to five the number of Metynnis species with chromosomal information. Metynnis was the first genus to diverge within Serrasalmini [ 6 ] and is essential to understand the evolution of remaining members of the tribe. The karyotype formulas and/or fundamental number were species-specific for the eight species, which can represent informative data to be used in combination with molecular markers to better understand the phylogenetic relationship in intergeneric level, especially concerning paraphyletic genera as Myleus , Myloplus , Tometes , and Pristobrycon .…”

Section: Discussionmentioning

confidence: 99%

“…For analysis of the evolution of the chromosome number in a phylogenetic context (adapted from [ 6 ]), data obtained from the eight species analyzed in this study were added to karyotype information already available in the literature i . e .…”

Section: Methodsmentioning

confidence: 99%

“…However, the hypothesis of the intrafamilial relationships within Serrasalmidae using of Ultraconserved Elements (UCEs), included all genera and the greatest number of species, and proposed a slightly different classification [ 6 ]. The family is presently composed by two major clades: (i) Colossomatinae, represented by species lacking a predorsal spine, and (ii) Serrasalminae, with species having a predorsal spine, and divided into Myleini (pacus) and Serrasalmini ( Metynnis plus piranhas).…”

Section: Introductionmentioning

confidence: 99%

“…The family is presently composed by two major clades: (i) Colossomatinae, represented by species lacking a predorsal spine, and (ii) Serrasalminae, with species having a predorsal spine, and divided into Myleini (pacus) and Serrasalmini ( Metynnis plus piranhas). Despite these advances, the monophyly of some genera was rejected, as Myleus , Myloplus , Pristobrycon , and Tometes [ 6 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…In the Brazilian Amazon, various lineages may represent new species, especially concerning Myloplus and Serrasalmus [ 21 ]. Two new species were recently described using the same marker, Catoprion absconditus Mateussi, Melo & Oliveira 2020 and Myloplus nigrolineatus Ota, Machado, Andrade, Collins, Farias & Hrbek 2020 [ 6 , 7 ]. In the basins of the Paraná-Paraguay and Tocantins rivers, a species complex was detected in Serrasalmus maculatus Kner 1858 [ 22 ] and five lineages were recognized in Pygocentrus nattereri Kner 1858 in different river basins [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Comparative cytogenetics of Serrasalmidae (Teleostei: Characiformes): The relationship between chromosomal evolution and molecular phylogenies

et al. 2021

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Serrasalmidae has high morphological and chromosomal diversity. Based on molecular hypotheses, the family is currently divided into two subfamilies, Colossomatinae and Serrasalminae, with Serrasalminae composed of two tribes: Myleini (comprising most of pacus species) and Serrasalmini (represented by Metynnis, Catoprion, and remaining piranha’s genera). This study aimed to analyze species of the tribes Myleini (Myloplus asterias, M. lobatus, M. rubripinnis, M. schomburgki, and Tometes camunani) and Serrasalmini (Metynnis cuiaba, M. hypsauchen, and M. longipinnis) using classical and molecular cytogenetic techniques in order to understand the chromosomal evolution of the family. The four species of the genus Myloplus and T. camunani presented 2n = 58 chromosomes, while the species of Metynnis presented 2n = 62 chromosomes. The distribution of heterochromatin occurred predominantly in pericentromeric regions in all species. Tometes camunani and Myloplus spp. presented only one site with 5S rDNA. Multiple markers of 18S rDNA were observed in T. camunani, M. asterias, M. lobatus, M. rubripinnis, and M. schomburgkii. For Metynnis, however, synteny of the 18S and 5S rDNA was observed in the three species, in addition to an additional 5S marker in M. longipinnis. These data, when superimposed on the phylogeny of the family, suggest a tendency to increase the diploid chromosome number from 54 to 62 chromosomes, which occurred in a nonlinear manner and is the result of several chromosomal rearrangements. In addition, the different karyotype formulas and locations of ribosomal sequences can be used as cytotaxonomic markers and assist in the identification of species.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative cytogenetics of Serrasalmidae (Teleostei: Characiformes): The relationship between chromosomal evolution and molecular phylogenies

et al. 2021

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Lip service: Histological phenotypes correlate with diet and feeding ecology in herbivorous pacus

Cohen

Lucanus

Summers

et al. 2022

The Anatomical Record

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Complex prey processing requires the repositioning of food between the teeth, as modulated by a soft tissue appendage like a tongue or lips. In this study, we trace the evolution of lips and ligaments, which are used during prey capture and prey processing in an herbivorous group of fishes. Pacus (Serrasalmidae) are Neotropical freshwater fishes that feed on leaves, fruits, and seeds. These prey are hard or tough, require high forces to fracture, contain abrasive or caustic elements, or deform considerably before failure. Pacus are gape-limited and do not have the pharyngeal jaws many bony fishes use to dismantle and/or transport prey. Despite their gape limitation, pacus feed on prey larger than their mouths, relying on robust teeth and a hypertrophied lower lip for manipulation and breakdown of food. We used histology to compare the lip morphology across 14 species of pacus and piranhas to better understand this soft tissue. We found that frugivorous pacus have larger, more complex lips which are innervated and folded at their surface, while grazing species have callused, mucus-covered lips. Unlike mammalian lips or tongues, pacu lips lack any intrinsic skeletal or smooth muscle. This implies that pacu lips lack dexterity; however, we found a novel connection to the primordial ligament which suggests that the lips are actuated by the jaw adductors. We propose that pacus combine hydraulic repositioning of prey inside the buccal cavity with direct oral manipulation, the latter using a combination of a morphologically heterodont dentition and compliant lips for reorienting food.

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Biogeography of curimatid fishes reveals multiple lowland–upland river transitions and differential diversification in the Neotropics (Teleostei, Curimatidae)

Melo

Albert

Dagosta

et al. 2021

Ecology and Evolution

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Phylogenomics of the Neotropical fish family Serrasalmidae with a novel intrafamilial classification (Teleostei: Characiformes)

Cited by 20 publications

References 61 publications

Comparative cytogenetics of Serrasalmidae (Teleostei: Characiformes): The relationship between chromosomal evolution and molecular phylogenies

Comparative cytogenetics of Serrasalmidae (Teleostei: Characiformes): The relationship between chromosomal evolution and molecular phylogenies

Lip service: Histological phenotypes correlate with diet and feeding ecology in herbivorous pacus

Biogeography of curimatid fishes reveals multiple lowland–upland river transitions and differential diversification in the Neotropics (Teleostei, Curimatidae)

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