Two new species of the Hypostomus cochliodon group (Siluriformes: Loricariidae) from the rio Negro basin in Brazil

Carvalho, Pedro Hollanda; Lima, Flávio C. T.; Zawadzki, Cláudio Henrique

doi:10.1590/s1679-62252010000100006

Cited by 16 publications

(13 citation statements)

References 9 publications

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“…Hypostomus La Cépède is the most speciesrich genus within the family Loricariidae, comprising 140 valid species according to Armbruster (2004), Armbruster et al (2007), and recent descriptions (Zawadzki et al, 2008a(Zawadzki et al, , 2008bCarvalho et al, 2010), occurring widely throughout the neotropics. The high intraspecific variation in its morphology results in many nominal species with unclear status in Hypostomus (Weber, 2003;Birindelli et al, 2007;Jerep et al, 2007).…”

Section: T He Genusmentioning

confidence: 99%

A New Species of Hypostomus (Siluriformes: Loricariidae) from the Upper Rio Paraguay Basin, Brazil

Martins

Marinho

Langeani

et al. 2012

Copeia

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A new small Loricariidae, Hypostomus careopinnatus, is described from the Rio Taquari drainage, upper Rio Paraguay basin, Mato Grosso, Brazil. The new species can be easily distinguished from all congeners, except Hypostomus levis, by the absence of adipose fin. Hypostomus careopinnatus is distinguished from H. levis mainly by the presence of slender bifid teeth, with mesial cusp large and rounded, and lateral cusp small and pointed (vs. spoon-shaped teeth). The new species described herein completely lacks the adipose fin and also lacks the median pre-adipose plates in almost all specimens examined. The absence of adipose fin is probably an independent acquisition for Hypostomus careopinnatus and Hypostomus levis.Um pequeno novo Loricariidae, Hypostomus careopinnatus, é descrito das drenagens do Rio Taquari, bacia do alto Rio Paraguai, Mato Grosso, Brasil. A nova espé cie distingue-se facilmente de todas as demais congêneres, exceto de Hypostomus levis, pela ausência da nadadeira adiposa. Hypostomus careopinnatus distingue-se de H. levis pela presença de dentes delgados e bicuspidados, com a cú spide mesial maior e arredondada, e a cú spide lateral menor e afilada (vs. dentes em forma de colher). A nova espé cie aqui descrita não possui nadadeira adiposa, e també m perdeu as placas medianas pré -adiposa, na maioria dos exemplares examinados. A ausência da nadadeira adiposa é provavelmente uma aquisição independente para Hypostomus careopinnatus e Hypostomus levis.

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Section: T He Genusmentioning

confidence: 99%

A New Species of Hypostomus (Siluriformes: Loricariidae) from the Upper Rio Paraguay Basin, Brazil

Martins

Marinho

Langeani

et al. 2012

Copeia

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“…Hypostomus represents the most diverse genus within this family (Weber, 2003;Hollanda Carvalho et al, 2010;Borba et al, 2013). The species of this genus live frequently in rapid flowing rivers and display a benthonic habit near to stony bottoms (Garavello and Garavello, 2004).…”

Section: Introductionmentioning

confidence: 99%

Comparative feeding ecology of four syntopic Hypostomus species in a Brazilian southeastern river

2016

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Though their broad distribution in most Brazilian rivers, scarce studies concerning ecological interactions on Hypostomus species are available. This study observes the diet, the trophic interactions and some morphological aspects of four syntopic species of Hypostomus. These fishes were studied at the superior part of the Corumbataí river, at São Paulo state, southeastern Brazil. Analyses focused feeding patterns, their amplitude and whether there happens some food items overlap among the species. Fish were caught using cast nets at some points of the river. Species were chosen according to their local abundance and, so there were four main species: H. albopunctatus, H. ancistroides, H. regani and H. strigaticeps. Nine food items were found: sediments, fungi, diatoms, green algae, Tecamoeba, vegetal debris and invertebrates. There were not significant differences for the feeding pattern among the four Hypostomus species. The feeding niche amplitude has been larger for H. albopunctatus influenced by a larger amount of vegetal debris and invertebrates. Elevated niche overlap was found to happen among the species and also for their trophic morphology. Results may suggest that there is a similar pattern in food taken between four species of Hypostomus analyzed since all consume similar environmental resources and have similar anatomical features. However, a different intake insect larvae and plant material in H. albopunctatus diet indicate differences in local and how this species may be exploring their food compared to the others.Keywords: Corumbataí river, niche breadth, niche overlap, macrohabitat. Ecologia alimentar comparativa de quatro espécies simpátricas deHypostomus em um rio do sudoeste brasileiro

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“…This group encompasses 20 valid nominal species and displays its greatest species richness in the Amazon basin with 15 species (Armbruster, 2003;Hollanda Carvalho & Weber, 2004;Armbruster & de Souza, 2005;Hollanda Carvalho et al, 2010). The five remaining non-amazonian species apparently have allopatric distributions.…”

Section: Introductionmentioning

confidence: 99%

A new species of the Hypostomus cochliodongroup (Siluriformes: Loricariidae) from the rio Aripuanã basin in Brazil

2014

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A new species of Hypostomus, H. dardanelos, is described from the rio Aripuanã basin, a southern tributary to the rio Madeira, in northern Mato Grosso State, Brazil. The new species is assigned to the Hypostomus cochliodon group by the possession of few teeth, spoon-shaped teeth, angle between dentaries usually less than 80°, and by the absence of a notch between hyomandibular and the metapterygoid. The new species can be diagnosed from its congeners by its unique color pattern of yellowish-brown ground color covered by well-defined dark spots of relatively equal size, evenly spaced and moderately set along the dorsal region of the body and fins, except on the ventrolateral region of the caudal peduncle and proximal region of anal and caudal fins, which are devoid of spots. The new species is further diagnosed by having teeth with very small lateral cusp, fused to the mesial one and almost imperceptible; by the absence of medial buccal papillae, and by nuptial odontodes all along the body (odontodes more pronounced in some few larger specimens).Uma espécie nova de Hypostomus, H. dardanelos, é descrita da bacia do rio Aripuanã, um tributário ao sul do rio Madeira, no norte do estado do Mato Grosso, Brasil. A espécie nova é atribuída ao grupo Hypostomus cochliodon por apresentar poucos dentes, dentes em forma de colher, ângulo entre os dentários usualmente menor que 80° e pela ausência de uma chanfradura entre o hiomandibular e o metapterigoide. A espécie nova pode ser diagnosticada de suas congêneres por seu padrão de cor único marrom-amarelado com pintas escuras bem definidas de tamanho homogêneo, moderadamente distanciadas e igualmente distribuídas ao longo da região dorsal do corpo e nadadeiras, exceto na região ventrolateral do pedúnculo caudal e na região proximal da nadadeira caudal, que são desprovidas de pintas. A espécie nova é adicionalmente diagnosticada por possuir dentes com a cúspide lateral muito reduzida, fundida à cúspide mesial e quase imperceptível; pela ausência da papila bucal medial e por odontódeos nupciais presentes em todo o corpo (odontódeos mais evidentes em alguns poucos exemplares maiores).

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Two new species of the Hypostomus cochliodon group (Siluriformes: Loricariidae) from the rio Negro basin in Brazil

Cited by 16 publications

References 9 publications

A New Species of Hypostomus (Siluriformes: Loricariidae) from the Upper Rio Paraguay Basin, Brazil

A New Species of Hypostomus (Siluriformes: Loricariidae) from the Upper Rio Paraguay Basin, Brazil

Comparative feeding ecology of four syntopic Hypostomus species in a Brazilian southeastern river

A new species of the Hypostomus cochliodongroup (Siluriformes: Loricariidae) from the rio Aripuanã basin in Brazil

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