2013
DOI: 10.1590/s1679-62252013000400006
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Abstract: A new species of Parotocinclus is described from the upper rio Piranhas-Açu basin, northeastern Brazil. The new species differs from all its congeners, except P. bidentatus, P. muriaensis (both from rio Paraíba do Sul basin, southeastern Brazil), and P. spilurus (rio Jaguaribe basin, northeastern Brazil) by presenting the adipose fin rudimentary or absent. The new species differs from P. bidentatus, P. muriaensis, and P. spilurus mainly by presenting the abdomen region extensively naked, with few reduced round… Show more

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Cited by 8 publications
(15 citation statements)
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References 15 publications
(17 reference statements)
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“…A similar modification is known in males of some Otocinclus species, and in both sexes of the monotypic genus Gymnotocinclus Carvalho, Lehmann & Reis (Carvalho et al, 2008). Ramos et al (2013) mentioned characters, such as the adipose fin rudimentary or absent, which can represent synapomorphies for Parotocinclus spilurus and P. seridoensis, indicating a sister-species relationship. The authors also mentioned a possible vicariant process due to a tectonic activation in northeastern Brazil (Lima, 2000;Bezerra et al, 2006), in which the Chapada de Apodi acted as a watershed divisor between the rio Jaguaribe and rio Piranhas-Açu basins, which could be involved in the origin of these species.…”
Section: Discussionsupporting
confidence: 59%
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“…A similar modification is known in males of some Otocinclus species, and in both sexes of the monotypic genus Gymnotocinclus Carvalho, Lehmann & Reis (Carvalho et al, 2008). Ramos et al (2013) mentioned characters, such as the adipose fin rudimentary or absent, which can represent synapomorphies for Parotocinclus spilurus and P. seridoensis, indicating a sister-species relationship. The authors also mentioned a possible vicariant process due to a tectonic activation in northeastern Brazil (Lima, 2000;Bezerra et al, 2006), in which the Chapada de Apodi acted as a watershed divisor between the rio Jaguaribe and rio Piranhas-Açu basins, which could be involved in the origin of these species.…”
Section: Discussionsupporting
confidence: 59%
“…The geographically closest species to Parotocinclus spilurus are P. seridoensis Ramos, Barros-Neto, Britski & Lima, endemic to the upper rio Piranhas-Açu basin, P. haroldoi Garavello inhabiting the rio Parnaíba basin (Ramos et al, 2013). Despite being isolated in separate river basins, these species are similar in morphology and color pattern and apparently are closely related.…”
Section: Discussionmentioning
confidence: 99%
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