Characidium xanthopterum (Ostariophysi: Characiformes: Crenuchidae): a new species from the Central Brazilian Plateau

Silveira, Luiz Guilherme Gonzaga; Langeani, Francisco; Graça, Weferson Júnio da; Pavanelli, Carla Simone; Buckup, Paulo Andreas

doi:10.1590/s1679-62252008000200003

Cited by 19 publications

(17 citation statements)

References 7 publications

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“…About 77% had average SL lower than 5 cm, and only two species showed average SL higher than 15 cm (G. carapo and Hoplias malabaricus). Among the 22 sampled species, eight are still taxonomically undefined (36.4%) and four were recently described (see Lucinda, 2008;Silveira et al, 2008;Zawadzki et al, 2008;Calegari & Reis, 2010 The cluster analysis showed a more marked spatial differences in species composition than seasonal differences, with groups representing stretches located farther (A) and closer (B) of headwaters (Fig. 3).…”

Section: Resultsmentioning

confidence: 96%

Structure and integrity of fish assemblages in streams associated to conservation units in Central Brazil

Couto

Aquino

2011

Neotrop. ichthyol.

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This study aims to characterize the spatial and seasonal distribution of the fish assemblage and evaluate the integrity of streams in a sustainable use area that includes integral protection conservation units in Distrito Federal, Central Brazil (Cerrado biome). For the study, 12 stretches of 8 streams were sampled in 2008 (dry season) and 2009 (wet season). For that evaluation was estimated the Physical Habitat Index (PHI), vegetation cover (VC), pH, dissolved oxygen, turbidity, and conductivity. We recorded 22 species, about eight undescribed species, by a total of 2,327 individuals. The most representative families in number of species were Characidae (31.8%), Loricariidae (31.8%), and Crenuchidae (13.6%). Knodus moenkhausii was the most abundant species with 1,476 individuals, added to Astyanax sp., Phalloceros harpagos, and Hasemania sp. they represent over 95% of the total abundance. The species Astyanax sp. (occurring in 79.2% of the stretches) and K. moenkhausii (50.0%) were considered constant in both seasons. The longitudinal gradient (River Continuum) exerts a strong influence on the studied assemblage. According to CCA, the variables that structure the fish assemblage are based on aspects related to water volume and habitat complexity. No seasonal variation in richness, diversity, abundance, and mass were detected. A cluster analysis suggests a separation of species composition between the stretches of higher and lower orders, which was not observed for seasonality. The streams were considered well preserved (mean PHI 82.9±7.5%), but in some stretches were observed anthropogenic influence, detected in the water quality and, mainly, on the riparian vegetation integrity. The exotic species Poecilia reticulata was sampled in the two stretches considered most affected by anthropogenic activities by PHI, conductivity, and VC.Esse estudo teve como objetivo caracterizar a distribuição espacial e sazonal da taxocenose de peixes e avaliar a integridade dos córregos de uma área de uso sustentável que inclui unidades de conservação de proteção integral no Distrito Federal, Brasil Central (bioma Cerrado). Para o estudo, foram amostrados 12 trechos de oito cursos d'água em 2008 (estação seca) e 2009 (estação chuvosa). Para essa avaliação foram utilizados o Índice Físico do Habitat (IFH), cobertura vegetal (CV), pH, oxigênio dissolvido, turbidez e condutividade. Foram coletadas 22 espécies, sendo oito não descritas, em um total de 2.327 indivíduos. As famílias mais representativas em número de espécies foram Characidae (31,8%), Loricariidae (31,8%) e Crenuchidae (13,6%). Knodus moenkhausii foi a espécie mais abundante, com 1.476 indivíduos, que juntamente com Astyanax sp., Phalloceros harpagos e Hasemania sp. representaram mais de 95% da abundância total. As espécies Astyanax sp. (ocorrendo em 79,2% dos trechos) e K. moenkhausii (50,0%) foram consideradas constantes nas duas estações. O gradiente longitudinal (rio Contínuo) exerce forte influência na taxocenose estudada. De acordo com a CCA, as variáveis que estru...

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Section: Resultsmentioning

confidence: 96%

Structure and integrity of fish assemblages in streams associated to conservation units in Central Brazil

Couto

Aquino

2011

Neotrop. ichthyol.

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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%

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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“…The presence of pseudotympanum in species of Characidium was cited in the description of a few species and in phylogenetic studies including few species of the genus (e.g., Géry, 1977;Silveira et al, 2008;Peixoto & Wosiacki, 2013;Mirande, 2010). Recently, Zanata & Camelier (2014) provided a somewhat detailed description of the pseudotympanum of C. bahiense, C. bimaculatum, C. samurai, and C. timbuiense.…”

Section: Discussionmentioning

confidence: 99%

“…Half of these species were described before 1950 and about 15 species were described after the year 2000 (e.g., Melo & Buckup, 2002;Taphorn et al, 2006;Silveira et al, 2008;Lujan et al, 2013;Peixoto & Wosiacki, 2013;Leitão & Buckup, 2014;Zanata & Camelier, 2014), indicating recent efforts to increase the taxonomic knowledge of the genus. Characidium is currently considered a monophyletic group based on the presence of a black spot near the base of the middle caudal-fin rays (Buckup, 1993a).…”

Section: Introductionmentioning

confidence: 99%

Two new species of Characidium Reinhardt (Characiformes: Crenuchidae) from northeastern Brazilian coastal drainages

Zanata

Camelier

2015

Neotrop. ichthyol.

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Two new species of Characidium, one from the rio Pardo basin, and another from the rio Paraguaçu basin, Bahia, Brazil, are described. The first new species is distinguished from its congeners by having conspicuous black vertical traces on body, formed by the concentration of melanophores along posterior margin of scales. The species further differs from most congeners by the presence of a conspicuous 3-shaped black blotch on the caudal fin and isthmus not covered by scales. The other new species is distinguished from congeners by having irregular dark blotches on dorsum alternating elongation to one or the other side of body, usually not connected to lateral blotches. The species can be further characterized by the absence of conspicuous blotches or bars on fins and the presence of secondary sexual dimorphism, such as pelvic fins of mature males longer than in females and with bony hooks. Duas novas espécies de Characidium, uma da bacia do rio Pardo e outra da bacia do rio Paraguaçu, Bahia, Brasil, são descritas. A primeira espécie nova distingue-se das congêneres por ter traços verticais pretos e conspícuos nas laterais do corpo, formados pela concentração de melanóforos ao longo da margem posterior das escamas. A espécie difere ainda da maioria das congêneres pela presença de faixa preta conspícua em forma de 3 na nadadeira caudal e istmo não coberto por escamas. A outra espécie nova se distingue das congêneres por ter manchas dorsais irregulares alternando alongamento para um ou outro lado do corpo, a maioria não conectada às manchas laterais. A espécie pode ser ainda caracterizada pela ausência de manchas ou barras conspícuas nas nadadeiras e pela presença de dimorfismo sexual secundário, tais como nadadeiras pélvicas dos machos maduros mais longas que em fêmeas e com espinhos ósseos.

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Characidium xanthopterum (Ostariophysi: Characiformes: Crenuchidae): a new species from the Central Brazilian Plateau

Cited by 19 publications

References 7 publications

Structure and integrity of fish assemblages in streams associated to conservation units in Central Brazil

Structure and integrity of fish assemblages in streams associated to conservation units in Central Brazil

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

Two new species of Characidium Reinhardt (Characiformes: Crenuchidae) from northeastern Brazilian coastal drainages

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