A New Species of<i>Characidium</i>Reinhardt (Characiformes, Crenuchidae) with a Distinctively Dimorphic Male

Melo, Marcelo R. S.; Oyakawa, Osvaldo Takeshi

doi:10.1643/ci-14-073

Cited by 20 publications

(31 citation statements)

References 11 publications

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“…Other species of Characidium that have faded vertical bars in adults are C. gomesi, C. fasciatum, C. mirim, C. pellucidum, C. satoi Melo andOyakawa, 2015, C. stigmosum, andC. xanthopterum Silveira, Langeani, da Graça, Pavanelli and, and the bars can be completely absent as in C. summus Zanata & Ohara, 2015(Eigenmann, 1909Buckup, 1992;Silveira et al, 2008;Netto-Ferreira et al, 2013;Melo & Oyakawa, 2015;Zanata & Ohara, 2015).…”

Section: Discussionmentioning

confidence: 99%

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A new species of Characidium Reinhardt, 1867 (Characiformes: Crenuchidae) endemic to the Atlantic Forest in Paraná State, southern Brazil

2016

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A new species of Characidium is described based on specimens obtained from the highland streams of the Serra do Mar, Atlantic Forest Biome, in Paraná State, Southern Brazil. The new species is possibly a member member of the C. lauroi group, which is diagnosed by having the isthmus unscaled, bars poorly marked, and spots on sides of body, and is composed by four additional species: C. japuhybense; C. lauroi; C. oiticicai; and C. schubarti. The new species differs from its congeners with naked isthmus, except C. helmeri, by having 15-18 principal caudal-fin rays; and 10-12 pectoral-fin rays; and from C. helmeri, by having a slender body, tip of pectoral fin not reaching origin of pelvic fin, tip of pelvic fin not reaching beyond anus, supraorbital present and well developed, and by lacking vertically elongated dashes on sides of body. The new species is known from tributaries of the rio Jordão, in the rio Iguaçu Basin, and rio Taquari, a tributary of the rio Ribeira de Iguape coastal drainage.Uma nova espécie de Characidium é descrita com base em exemplares obtidos de riachos de altitude da Serra do Mar, no bioma Mata Atlântica, do Estado do Paraná, Sul do Brasil. A nova espécie é possivelmente um membro do grupo C. lauroi, que pode ser diagnosticado por possuir o istmo sem escamas, barras pouco marcadas e pontos nos lados do corpo, e é composto por quatro espécies adicionais: C. japuhybense; C. lauroi; C. oiticicai; e C. schubarti. A nova espécie difere de seus congêneres com istmo nú, exceto C. helmeri, por possuir 15-18 raios principais na nadadeira caudal, e 10-12 raios na nadadeira peitoral; e de C. helmeri, por possuir o corpo mais alongado, pela ponta da nadadeira peitoral não alcançar a nadadeira pélvica, pela ponta da nadadeira pélvica não alcançar o ânus, pelo supraorbital presente e bem desenvolvido, e pela ausência de manchas verticalmente alongadas na porção ventral do corpo. A nova espécie é conhecida de duas drenagens, nos tributários do rio Jordão, na bacia do rio Iguaçu, e no rio Taquari, um tributário da bacia costeira do rio Ribeira de Iguape.

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Section: Discussionmentioning

confidence: 99%

“…Morphometric and meristic data were obtained from the left side of specimens, under a binocular stereomicroscope, according to Buckup (1993a) and Melo & Oyakawa (2015). Measurements were taken using a digital caliper to 0.1 mm.…”

Section: Methodsmentioning

confidence: 99%

A new species of Characidium Reinhardt, 1867 (Characiformes: Crenuchidae) endemic to the Atlantic Forest in Paraná State, southern Brazil

2016

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“…Meristic and morphometric data were obtained from the left side of specimens, unless some damage was verified, with the use of a binocular stereomicroscope and a digital caliper with 0.01 mm precision. Counts and measurements were performed according to protocols previously established for crenuchid fishes (Buckup, 1993b;Melo, Oyakawa, 2015). We also counted number of scales in the series extending between anus and anal-fin base; the first scale of this series is usually small, pointy, and located just posterior to the anus, and the scale located immediately anterior to the anal-fin origin is usually U-shaped and surrounds the first anal-fin ray.…”

Section: Methodsmentioning

confidence: 99%

“…based on holotype (MNRJ 51282) and paratypes (MNRJ 41832, n=9;MNRJ 50962, n=13;MNRJ 50973, n=4;MBML 13549, n=5). Distances are based on landmarks described in Melo, Oyakawa (2015); 'n' is the number of specimens examined; SD is the standard deviation. Dorsal-fin rays i,9(1), ii,8(3), ii,9(27*), or ii,10(1).…”

Section: E180121[6]mentioning

confidence: 99%

A new species of Characidium (Characiformes: Crenuchidae) from coastal basins in the Atlantic Rainforest of eastern Brazil, with phylogenetic and phylogeographic insights into the Characidium alipioi species group

et al. 2019

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A new species of Characidium from southeastern Brazil is described based on morphological and molecular evidence from specimens collected between the rio Jucuruçu and rio Doce basins. The new species belongs to a group of species within Characidium with an unscaled area in the isthmus and is distinguished from these species, except C. alipioi, C. fasciatum, C. hasemani, and C. kamakan, by the greater distance (greater than 10% SL) and presence of 5-7 scales between the anus and the anal fin, and presence of 14 series of scales around the caudal peduncle. The species is distinguished from C. alipioi by having 4 series of scales above the lateral line (vs. 5 series) and greater distance between the anus and the anal fin; from C. fasciatum and C. kamakan, by the smaller body depth at the dorsal-fin origin, at the anal-fin origin, and at the caudal peduncle; from C. hasemani, by the short distances between the tip of the snout and the pelvic fin, the tip of the snout and the anal fin, and the tip of the snout and the tip of anal fin. The new species forms a presumably monophyletic group with C. alipioi and C. kamakan.

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“…Measurements and counts followed Buckup () and Melo and Oyakawa (), except the adipose‐fin height, due to its absence, with the addition of the count of the total number of scale rows between the anus and the first anal‐fin ray, proposed by Melo and Buckup (). Measurements were taken with digital callipers to the nearest 0.1 mm, expressed as the percentages of the standard length ( L S ) for body parts and head length ( L H ) for parts of the head.…”

Section: Methodsmentioning

confidence: 99%

A new species of miniature Characidium (Characiformes: Crenuchidae) from the upper Rio Paraguay basin, Mato Grosso state, Brazil

Graça

Ota

Domingues

2019

Journal of Fish Biology

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A new miniature species of Characidium is described from the upper Rio Paraguay basin, Brazil. The new species can be diagnosed from all congeners by the presence of a dark-brown humeral blotch, vertically elongated (spanning 5 to 7 horizontal scale rows), with the shape of an upside-down acute triangle. Additionally, it can be diagnosed by a short lateral line (6 to 8 perforated scales), the absence of a conspicuous peduncular blotch, a lower number of principal caudal-fin rays (14-16) and by absence of the adipose fin. The new species is the smallest species of the genus; the largest specimen was 19.3 mm standard length.

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A New Species ofCharacidiumReinhardt (Characiformes, Crenuchidae) with a Distinctively Dimorphic Male

Cited by 20 publications

References 11 publications

A new species of Characidium Reinhardt, 1867 (Characiformes: Crenuchidae) endemic to the Atlantic Forest in Paraná State, southern Brazil

A new species of Characidium Reinhardt, 1867 (Characiformes: Crenuchidae) endemic to the Atlantic Forest in Paraná State, southern Brazil

A new species of Characidium (Characiformes: Crenuchidae) from coastal basins in the Atlantic Rainforest of eastern Brazil, with phylogenetic and phylogeographic insights into the Characidium alipioi species group

A new species of miniature Characidium (Characiformes: Crenuchidae) from the upper Rio Paraguay basin, Mato Grosso state, Brazil

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