Composition and seasonal variation of the ichthyofauna from upper Rio Paraguaçu (Chapada Diamantina, Bahia, Brazil)

Santos, Alexandre Clístenes de Alcântara; Caramaschi, Érica Pellegrini

doi:10.1590/s1516-89132007000400012

Cited by 16 publications

(13 citation statements)

References 11 publications

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“…Neighboring headwaters include those of the rio Paraguaçu to the south and lower stretches of the rio São Francisco to the north and west. A few trichomycterids have been recorded for northeastern Brazil, including four species endemic to headwaters of the rio Paraguaçu: Copionodon pecten, C. orthiocarinatus, Glaphyropoma rodriguesi, G. spinosum, and Ituglanis paraguassuensis (de Pinna, 1992;Campos-Paiva & Costa, 2007;Santos & Caramaschi, 2007;Bichuette et al, 2008) and two species from southern Bahia: Trichomycterus bahianus and T. pradensis (Costa, 1992;Sarmento-Soares et al, 2005). The six Trichomycterus species assigned to the rio São Francisco basin were described from its upper and middle stretches, in Minas Gerais State (Lütken, 1875;Eigenmann, 1918;Costa, 1992;Trajano & de Pinna, 1996;Wosiacki, 2004).…”

Section: Discussionmentioning

confidence: 99%

Trichomycterus payaya, new catfish (Siluriformes: Trichomycteridae) from headwaters of rio Itapicuru, Bahia, Brazil

2011

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1Trichomycterus payaya, new species, is described from tributaries to the upper rio Itapicuru basin, northern Bahia State, Brazil. The new species is distinguished from congeners by having the head rounded anteriorly in dorsal view and slightly depressed in lateral view, supraorbital pores s6 paired, opening laterally on the supraorbital sensory branch, not emerging from an epiphyseal branch, lateral process of the urohyal distally sharp and with pointed tip, interopercular patch of odontodes longer than deep, with 21-26 odontodes, small number of pleural ribs (5-6 ribs), and dorsal fin in a posterior position. This is the first record of a Trichomycterus from the semiarid region of northeastern Brazil.Trichomycterus payaya, espécie nova, é descrita de tributários do alto rio Itapicuru, norte do Estado da Bahia, Brasil. A espécie nova distingue-se dos congêneres por ter cabeça arredondada anteriormente em vista dorsal e ligeiramente deprimida em vista lateral, poros supraorbitais s6 pares, abrindo-se lateralmente no ramo sensorial supraorbital, não emergindo a partir de um ramo epifiseal, processo lateral do urohial afilado distalmente e com extremidades pontiagudas, placa de odontódeos interoperculares mais longa que larga, com 21-26 odontódeos, baixo número de costelas pleurais (5-6 costelas) e nadadeira dorsal em posição posterior. Este éo primeiro registro de um Trichomycterus para o semi-árido do nordeste do Brasil.

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Section: Discussionmentioning

confidence: 99%

Trichomycterus payaya, new catfish (Siluriformes: Trichomycteridae) from headwaters of rio Itapicuru, Bahia, Brazil

2011

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“…Although a study of relationships was not performed, we suggest that the closest relatives of H. jaguar are possibly congeners from outside the rio Paraguaçu basin. The endemic nature of the rio Paraguaçu ichthyofauna has been previously highlighted (e.g., Lima & Gerhard, 2001;Santos & Zanata, 2006;Birindelli et al, 2007;Santos & Caramaschi, 2007) and a total of 16 described species are now known to be endemic to the basin. Hypostomus jaguar represents the tenth siluriform species that is apparently endemic to the Paraguaçu basin.…”

Section: Distributionmentioning

confidence: 96%

A new dark-dotted species of Hypostomus Lacépède (Siluriformes: Loricariidae) from rio Paraguaçu, Bahia State, Brazil

Zanata¹,

Sardeiro²,

Zawadzki³

2013

Neotrop. ichthyol.

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A new species of Hypostomus Lacépède is described from the rio Paraguaçu basin, Bahia State, Brazil. The new species is distinguished from its congeners by having black and conspicuous dots on a pale background, which are similar in size on the head, trunk, and fins, along with ventral surface of head and abdomen naked or the latter plated exclusively on its anterior portion, absence of ridges on head and trunk, and caudal-fin lobes relatively similar in length. The new species further differs from the sympatric H. chrysostiktos by having seven branched dorsal-fin rays instead of 10-11 and represents the eleventh siluriform species endemic to the rio Paraguaçu basin.Uma espécie nova de Hypostomus Lacépède é descrita da bacia do rio Paraguaçu, estado da Bahia, Brasil. A espécie nova distingue-se de suas congêneres por apresentar corpo com manchas pretas e conspícuas sobre fundo claro de tamanho semelhante no tronco, cabeça e nadadeiras, além da superfície ventral da cabeça e abdômen nus ou apenas porção anterior do abdômen coberto por placas, ausência de quilhas na cabeça e no corpo e lobos da nadadeira caudal relativamente similares no comprimento. A espécie nova difere ainda da simpátrica H. chrysostiktos por ter sete raios ramificados na nadadeira dorsal ao invés de 10-11 e representa a décima primeira espécie de siluriforme endêmica da bacia do rio Paraguaçu.

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“…This generic allocation is justified by a new diagnosis for Rhamdiopsis, which was herein modified to include R. krugi. Undescribed species of Rhamdiopsis have been recently cited in the literature (Bizerril, 1999;Santos, 2005;Santos & Caramaschi, 2007), including one troglobitic (Trajano, 2001b(Trajano, , 2007Trajano & Bichuette, 2005b). All these mentions were based on our ongoing revisionary work on this genus (Bockmann & Castro, in prep.).…”

Section: Phylogenetics Relationships Of Rhamdiopsis Krugimentioning

confidence: 99%

“…Rhamdiopsis krugi is an exception, being confined to the upper rio Paraguaçu basin, which belongs to the region comprising the coastal drainages of eastern Brazil (Bizerril, 1994;Ribeiro, 2006). Besides R. krugi, four other species of Rhamdiopsis occur in that area: an isolated population of R. moreirai that is restricted to the upper reaches of the rio Ribeira de Iguape (Abilhoa & Duboc, 2004), a new species from the rio Paraibuna basin, a left side tributary of the rio Paraíba do Sul (Bizerril, 1999), a new species from the upper rio Paraguaçu basin (Santos, 2005;Santos & Caramaschi, 2007), and a new species from the upper reaches of the rio Jequitinhonha (pers. obs.).…”

Section: )mentioning

confidence: 99%

“…Such a distribution suggests that non-litoraneous segments of at least these four principal river basins from the system of coastal drainages of eastern Brazil have closer affinities with the adjacent portions of the rio Paraná and rio São Francisco basins than with their own mid and lower courses. Concerning the rio Paraguaçu basin, this situation is highlighted by the discovery of a high number of species in the upper reaches of the river that were previously known only from interior basins or with close phylogenetic relationships to lineages inhabiting these interior drainages (Santos & Caramaschi, 2007), for example: Apareiodon hasemani Eigenmann and Phenacogaster franciscoensis Eigenmann, both considered endemic to the rio São Francisco basin Pavanelli, 2003), Moenkhausia diamantina Benine, Castro & Santos, that is probably related to a species-group whose members live in the drainages of Guyanas, and Amazon, Orinoco, Paranaíba, São Francisco, Paraná, Paraguay, and Uruguay basins (Lima et al, 2003;Benine et al, 2007), Trichomycterus cf. brasiliensis, that possibly pertains to T. brasiliensis species-complex, which is distributed through the upper rio Paraná, upper reaches of the rio São Francisco, rio Paraíba do Sul, and rio Ribeira do Iguape (Bockmann & Sazima, 2004), and Pamphorichthys hollandi (Henn), known from the rio São Francisco, rio Parnaíba and upper rio Paraná basins (Figueiredo, 1997;Lucinda, 2003;Casatti et al, 2006).…”

Section: )mentioning

confidence: 99%

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The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

Bockmann

Castro

2010

Neotrop. ichthyol.

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Rhamdiopsis krugi, a new troglobitic heptapterid catfish, is described from the caves of Chapada Diamantina, State of Bahia, northeastern Brazil. This species, although frequently cited in the scientific literature along the last seventeen years, remained undescribed largely due to its uncertain phylogenetic affinities. The generic assignment of R. krugi was clouded largely by its high number of unusual morphological features (some related to cave life), for instance: absence of eyes and body pigmentation; presence of a widely exposed pseudotympanum; posterior border of the anterior branch and anterior margin of the arborescent portion of the posterior branch of the transverse process of fourth vertebra joined; dorsal hypural plate commonly with seven rays; ventral caudal plate usually with six rays; dorsal and ventral caudal-fin lobes typically with six branched fin rays each; 38-39 vertebrae; anal fin with 14-17 rays; and lateral line very short. Rhamdiopsis krugi can be easily distinguished from its congeners, R. microcephala and R. moreirai, by its troglomorphic features and by the presence of a shorter lateral line, fewer vertebrae and anal-fin rays, pattern of branching of caudal-fin rays, and several attributes of skeletal system. The affinities of this new species are discussed in light of current phylogenetic knowledge of the family Heptapteridae. Incongruent derived characters do not allow selection of a particular hypothesis of sister group relationships among species of Rhamdiopsis. The occurrence of R. krugi in the rio Paraguaçu basin is possibly due to an event of hydrological capture from a section of the middle portion of the rio São Francisco basin, caused by tectonic events. The semi-arid region where R. krugi presently lives was probably covered by a wide forested area during a humid cycle in Quaternary. A summary of natural history and ecology data of R. krugi, as well as notes on its conservation, are provided. We also offer comments on the morphological plasticity of R. krugi.Rhamdiopsis krugi, um novo bagre heptapterídeo troglóbio, é descrito de cavernas da Chapada Diamantina, Estado da Bahia, nordeste do Brasil. Esta espécie, embora frequentemente citada na literatura ao longo dos últimos dezessete anos, não foi descrita antes em função das suas afinidades filogenéticas incertas. A posição genérica de R. krugi foi obscurecida principalmente pelo seu alto número de caracteres morfológicos incomuns (parte deles relacionada à vida nas cavernas), como por exemplo: ausência de olhos e de pigmentação corporal; presença de um pseudotímpano amplamente exposto; borda posterior do ramo anterior e margem anterior da porção arborescente do ramo posterior do processo transverso da quarta vértebra conectados um ao outro; placa hipural dorsal normalmente com sete raios; placa caudal ventral usualmente com seis raios; lobos dorsal e ventral da nadadeira caudal tipicamente com seis raios ramificados cada; 38-39 vértebras; nadadeira anal com 14-17 raios; e linha lateral muito curta. Rhamdiopsis krugi pode ...

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Composition and seasonal variation of the ichthyofauna from upper Rio Paraguaçu (Chapada Diamantina, Bahia, Brazil)

Abstract: ABSTRACT

Cited by 16 publications

References 11 publications

Trichomycterus payaya, new catfish (Siluriformes: Trichomycteridae) from headwaters of rio Itapicuru, Bahia, Brazil

Trichomycterus payaya, new catfish (Siluriformes: Trichomycteridae) from headwaters of rio Itapicuru, Bahia, Brazil

A new dark-dotted species of Hypostomus Lacépède (Siluriformes: Loricariidae) from rio Paraguaçu, Bahia State, Brazil

The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

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