The loricariid catfish genus Lasiancistrus (Siluriformes) with descriptions of two new species

Armbruster, Jonathan W.

doi:10.1590/s1679-62252005000400013

Cited by 25 publications

(15 citation statements)

References 8 publications

(15 reference statements)

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“…We note that the whisker-like odontodes characteristic of the genus were not apparent in our juvenile specimens, but we did observe bifurcating tentacules on the interopercular plate, and combined with the other characters, are confident that the specimens belong to Lasiancistrus schomburgkii as proposed by Armbruster (2005).…”

Section: Checklistssupporting

confidence: 51%

“…Identification to species level follows Armbruster (2005) based on the following characters: three rows of lateral plates on the caudal peduncle; bar-shaped opercle; snout plates present; lateral plates not keeled; > 30 teeth per jaw ramus; body and fins (except dorsal and caudal) dark with small pale dots; plates not outlined with dark pigment; and caudal fin with darker lower lobe. We note that the whisker-like odontodes characteristic of the genus were not apparent in our juvenile specimens, but we did observe bifurcating tentacules on the interopercular plate, and combined with the other characters, are confident that the specimens belong to Lasiancistrus schomburgkii as proposed by Armbruster (2005).…”

Section: Checklistsmentioning

confidence: 99%

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A preliminary inventory of the catfishes of the lower Rio Nhamundá, Brazil (Ostariophysi, Siluriformes)

Collins

Ribeiro²,

Machado³

et al. 2015

BDJ

1,339

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The Rio Nhamundá is a poorly-known clearwater river draining the southern Guiana Shield of Brazil. In this study we report the findings of a preliminary ichthyological survey, focusing on catfishes (Siluriformes). We identify a total of 36 species (31 genera, seven families) from the Nhamundá, including 11 species already recorded from the river. Overall, our survey results show that even rapid surveys can provide important information on Amazon fish biodiversity, suggesting potential new species, providing range extensions for nominal species, and additionally highlighting taxa in need of taxonomic revision and genetic study. As well as the traditional forms of data collected on biodiversity surveys (i.e. preserved specimen vouchers), our study also provides "new" types of data in the form of DNA barcodes and images of fishes exhibiting colouration in life, information that will be invaluable in future work addressing difficult groups.O Rio Nhamundá é um rio de água clara, pouco conhecido, que drena parte do Escudo das Guianas em território brasileiro. Nesse estudo, nós reportamos os resultados de um levantamento ictiofaunístico preliminar dessa área, tendo como foco os bagres (Siluriformes). Nós identificamos um total de 36 espécies (31 gêneros, sete famílias) provenientes de nossa coleta, e adicionamos 11 espécies já conhecidas para o rio. De maneira geral, os resultados de nossa pesquisa mostram que mesmo levantamentos rápidos podem gerar informações importantes sobre a biodiversidade de peixes amazônicos, sugerindo potenciais espécies novas, ampliando a área de distribuição de espécies, além de apontar a necessidade de revisões taxonômicas e estudos genéticos para alguns taxa. Para além das formas tradicionais de dados coletados em pesquisas de biodiversidade (i.e. espécimes preservados), nosso estudo fornece "novas" formas de dados, como DNA barcodes e imagens com o padrão de coloração dos espécimes vivos, informações essas que serão de valor inestimável para futuros estudos que abordem grupos taxonômicos difíceis.

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Section: Checklistssupporting

confidence: 51%

Section: Checklistsmentioning

confidence: 99%

A preliminary inventory of the catfishes of the lower Rio Nhamundá, Brazil (Ostariophysi, Siluriformes)

Collins

Ribeiro²,

Machado³

et al. 2015

BDJ

1,339

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show abstract

“…In the field, specimens were anaesthetized in menthol solution (150 mg l −1 ) for 10 min according to the procedures describe in Façanha & Gomes (2005) and then fixed in formalin (10%). In the laboratory, fishes were preserved in alcohol (75%) and identified using taxonomic keys (Eigenmann, 1918; Dahl, 1971; Géry, 1977; Vari & Harold, 2001; Román‐Valencia, 2003; Armbruster, 2005; Maldonado‐Ocampo et al , 2005; Vari et al , 2005) and by comparison with identified material in the fish collection of the Instituto de Investigaciones de Recursos Biológicos Alexander von Humboldt (IAvH‐P). Once identified, specimens were deposited at IAvH‐P and in the Universidad Católica de Oriente (CP‐UCO).…”

Section: Methodsmentioning

confidence: 99%

Altitudinal variation in fish assemblage diversity in streams of the central Andes of Colombia

Jaramillo-Villa

Maldonado-Ocampo

Escobar

2010

Journal of Fish Biology

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This study documents differences in fish assemblages for 32 freshwater streams located between 258 and 2242 m a.s.l. on the eastern slopes of the central range of the Colombian Andes. A total of 2049 fishes belonging to 62 species, 34 genera and 16 families were collected. Species richness declined rapidly with altitude; nearly 90% of the species were recorded between 250 and 1250 m a.s.l. Three of the four physico-chemical variables, of the water, temperature, dissolved oxygen and pH, explained 53.5% of the variation in species richness along the altitudinal gradient, with temperature the most important (37.6%). An analysis of species composition showed that the distinctiveness of the fish fauna increased with elevation, with the greatest turnover observed between 1000 and 1750 m a.s.l. On this altitudinal gradient, turnover was dominated by the loss of species rather than gain, and dominance by just a few species was greater at higher elevations. Turnover was also observed along the altitudinal gradient in the structure of the three functional groups (torrential, pool and pelagic species). The study focused on understanding the pattern of diversity of fish communities inhabiting the Andes in Colombia. Anthropogenic effects on the altitudinal distribution of fish species in the region, however, are largely unknown and would require further investigations.

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“…Kullander (1995) listed 10 fish species (including G. mirabilis) known from the upper rio Aripuanã, including the entire upstream stretch and, in some cases, a distance of few kilometers downstream from Dardanelos/Andorinhas falls, as well as its tributaries that drain into those stretches. From that list of species, Lasiancistrus scolymus Nijssen & Isbrücker (Loricariidae) is now considered a synonym of the widespread L. schomburgkii (Günther) (Armbruster, 2005); and Crenicichla guentheri Ploeg has been synonymized with the local endemic C. hemera Kullander (Varella et al, 2012). A species overlooked by Kullander (1995), Utiaritichthys longidorsalis Jégu, Tito de Morais & Santos (Serrasalmidae), and the recently described Trachycorystes menezesi Britski & Akama (Auchenipteridae) and Hypostomus dardanelos Zawadzki & Carvalho (Loricariidae) should be added to the list, changing the number of valid species considered endemic to that region to 11, including Geophagus mirabilis (Jégu et al, 1992;Britski & Akama, 2011;Zawadzki & Carvalho, 2014).…”

Section: Discussionmentioning

confidence: 99%

A new colorful species of Geophagus (Teleostei: Cichlidae), endemic to the rio Aripuanã in the Amazon basin of Brazil

Deprá

Kullander²,

Pavanelli

et al. 2014

Neotrop. ichthyol.

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Geophagus mirabilis, new species, is endemic to the rio Aripuanã drainage upstream from Dardanelos/Andorinhas falls. The new species is distinguished from all other species of the genus by the presence of one to five large black spots arranged longitudinally along the middle of the flank, in addition to the black midlateral spot that is characteristic of species in the genus and by a pattern of iridescent spots and lines on the head in living specimens. It is further distinguished from all congeneric species, except G. camopiensis and G. crocatus, by the presence of seven (vs. eight or more) scale rows in the circumpeduncular series below the lateral line (7 in G. crocatus; 7-9 in G. camopiensis). Including the new species, five cichlids and 11 fish species in total are known only from the upper rio Aripuanã, and 15 fish species in total are known only from the rio Aripuanã drainage.Geophagus mirabilis, espécie nova, é endêmica da drenagem do rio Aripuanã, a montante das quedas de Dardanelos/ Andorinhas. A espécie nova se distingue de todas as outras espécies do gênero pela presença de uma a cinco manchas pretas grandes distribuídas longitudinalmente ao longo do meio do flanco, em adição à mancha preta no meio do flanco característica das espécies do gênero, e por um padrão de pontos e linhas iridescentes sobre a cabeça em espécimes vivos. Além disso, se distingue de todas as espécies congêneres, exceto G. camopiensis e G. crocatus, pela presença de sete (vs. oito ou mais) séries de escamas na série circumpeduncular abaixo da linha lateral (7 em G. crocatus; 7-9 em G. camopiensis). Com a espécie nova existem cinco ciclídeos, e ao todo 11 espécies de peixe conhecidas somente do alto rio Aripuanã, e ao todo 15 espécies de peixe conhecidas apenas da bacia do rio Aripuanã.

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The loricariid catfish genus Lasiancistrus (Siluriformes) with descriptions of two new species

Cited by 25 publications

References 8 publications

A preliminary inventory of the catfishes of the lower Rio Nhamundá, Brazil (Ostariophysi, Siluriformes)

A preliminary inventory of the catfishes of the lower Rio Nhamundá, Brazil (Ostariophysi, Siluriformes)

Altitudinal variation in fish assemblage diversity in streams of the central Andes of Colombia

A new colorful species of Geophagus (Teleostei: Cichlidae), endemic to the rio Aripuanã in the Amazon basin of Brazil

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