2017
DOI: 10.1371/journal.pone.0170053
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A new species of Tometes Valenciennes 1850 (Characiformes: Serrasalmidae) from Tocantins-Araguaia River Basin based on integrative analysis of molecular and morphological data

Abstract: A new large serrasalmid species of Tometes is described from the Tocantins-Araguaia River Basin. Tometes siderocarajensis sp. nov. is currently found in the rapids of the Itacaiúnas River Basin, and formerly inhabited the lower Tocantins River. The new species can be distinguished from all congeners, except from T. ancylorhynchus, by the presence of lateral space between 1st and 2nd premaxillary teeth, and by the absence of lateral cusps in these two teeth. However, T. siderocarajensis sp. nov. can be differen… Show more

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Cited by 18 publications
(17 citation statements)
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“…The taxonomy and systematics of Serrasalmidae have a long-checkered past “fraught with confusion and instability” (Nico et al, 2018:172). Recent morphological studies have helped distinguish and diagnose a variety of valid genera and species (e.g., Pereira and Castro, 2014; Andrade et al, 2016a; 2016b; 2016c; 2017; 2018; 2019b; Ota et al, 2016; Mateussi et al, 2018; Nico et al, 2018; Escobar et al, 2019). The current study provides robust molecular support for recognizing three major lineages of Serrasalmidae at the subfamilial rank: Colossominae (pacus common to lowland, white water habitats), Myleinae (pacus common to upland clear- and black water habitats), and Serrasalminae (Metynnis and piranhas, cosmopolitan).…”
Section: Discussionmentioning
confidence: 99%
“…The taxonomy and systematics of Serrasalmidae have a long-checkered past “fraught with confusion and instability” (Nico et al, 2018:172). Recent morphological studies have helped distinguish and diagnose a variety of valid genera and species (e.g., Pereira and Castro, 2014; Andrade et al, 2016a; 2016b; 2016c; 2017; 2018; 2019b; Ota et al, 2016; Mateussi et al, 2018; Nico et al, 2018; Escobar et al, 2019). The current study provides robust molecular support for recognizing three major lineages of Serrasalmidae at the subfamilial rank: Colossominae (pacus common to lowland, white water habitats), Myleinae (pacus common to upland clear- and black water habitats), and Serrasalminae (Metynnis and piranhas, cosmopolitan).…”
Section: Discussionmentioning
confidence: 99%
“…We constructed a phylogenetic hypothesis (Figure ) based on the time calibrated molecular phylogeny (mt control region +10 nuclear genes) of Thompson et al (), the mt control region and 12S and 16S rRNA phylogenies of Ortí, et al (2008), and the mt cytochrome c oxidase subunit I gene phylogeny of Tometes spp. from Andrade et al (). We constructed a matrix with rate parsimony (mrp; Bininda‐Emonds, ; Sanderson, Purvis, & Henze, ) composite tree from three phylogeny nexus files that were constructed based on these published phylogenies.…”
Section: Methodsmentioning
confidence: 97%
“…We used the piranha clade topology obtained from Bayesian inference of the control region (1,130 bp) and 86 indel characters in Ortí et al (2008, Figure ). The third nexus file was constructed from the maximum likelihood tree obtained from two mitochondrial genes (COI and control region) in Andrade et al ().…”
Section: Methodsmentioning
confidence: 99%
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“…). The keel has been used by systematists to distinguish between certain species of serrasalmids, most notably herbivorous genera like Tometes, Myloplus, Myleus , and Utiarichthys (Pereira and Castro, ; Andrade et al, 2016 a,b, Andrade et al, ). The keel is highly variable: robust, stretching from anus to gular region in some lineages; while a curiously truncated, post‐pelvic remnant exists in some rheophilic taxa like Tometes and Ossubtus .…”
Section: Introductionmentioning
confidence: 99%