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Diagnose dreier neuer Harnischwelsgattungen mit fünf neuen Arten aus Brasilien (Pisces, Siluriformes, Loricariidae).
... Hopliancistrus tricornis was described as a new species and new genus [4] belonging to a new tribe (Hopliancistrini) within the former Ancistrinae (sensu [4]). Despite being wellknown in the aquarium trade (code L212; [5]), the only known preserved specimens of Hopliancistrus available in collections at the time of its original description were from the lower Rio Tapajós (collected by the Expedição Permanente da Amazônia in 1970), and from Cachoeira von Martius in upper Rio Xingu basin (collected by Jean-Pierre Gosse in 1964). ...
... Hopliancistrus tricornis was described as a new species and new genus [4] belonging to a new tribe (Hopliancistrini) within the former Ancistrinae (sensu [4]). Despite being wellknown in the aquarium trade (code L212; [5]), the only known preserved specimens of Hopliancistrus available in collections at the time of its original description were from the lower Rio Tapajós (collected by the Expedição Permanente da Amazônia in 1970), and from Cachoeira von Martius in upper Rio Xingu basin (collected by Jean-Pierre Gosse in 1964). ...
... Vertebrae 28 (6). Seven (4) or eight (2) rib pairs. Color in alcohol. ...
Hopliancistrus is an Ancistrini genus diagnosed by having few and very strong cheek odontodes on interopercular area, and a patch of strong and stiff odontodes on the antero-lateral border of the snout. The type species is herein redescribed based on types and recently collected specimens. In addition, four new congeneric species are described based on specimens collected in other parts of the Rio Xingu and Rio Tapajós basins. Hopliancistrus tricornis is distributed in the lower Rio Tapajós and is diagnosed by the possession of four branched anal-fin rays and relatively large white to yellow spots on trunk and pectoral and pelvic fins, and dark brown spots on dorsal, caudal and anal fins. Hopliancistrus munduruku is described based on specimens from Rio Jamanxim (Rio Tapajós basin) and Rio Curuá (Rio Xingu basin) and is diagnosed by the possession of five branched anal-fin rays and large yellow blotches on trunk and dark brown to black spots over the fins. Hopliancistrus wolverine is distributed in the rapids of the lower and middle Rio Xingu and is diagnosed by the possession of five branched anal-fin rays and conspicuous small yellow dots on head, trunk and fins. Hopliancistrus xikrin is distributed in medium- to small-sized tributaries of the lower portion of Rio Xingu basin, and is diagnosed by absence of contact between the transverse process of the first dorsal-fin pterygiophore and the transverse process of the second pterygiophore. Hopliancistrus xavante is distributed in the tributaries of upper Rio Xingu basin, and is diagnosed by having a thick skin covering the nuchal plate; by having large white spots on trunk and fins; and by the possession of five branched anal-fin rays. An osteological description and a key for species identification are also provided.
... Scobinancistrus aureatus é um peixe da ordem Siluriformes, família Loricariidae, subfamília Hypostominae. O gênero pode ser facilmente diagnosticado pela presença de, no máximo, cinco dentes no dentário e cinco no pré-maxilar, com os dentes do dentário sendo duas vezes maiores que os dentes pré-maxilares (Isbrücker, Nijssen, 1989). A espécie foi descrita por Burgess (1994) com base em dois espécimes, sendo a segunda espécie descrita no gênero Scobinancistrus. ...
... i Liposarcus Günther 1864 being synonym of Pterygoplichthys Gill 1858 (Armbruster, 2004). j Description of the species was published in the aquarium journal DATZ two months after assignment of L29 (Isbrücker and Nijssen, 1989). L number is not mentioned in the species description, but there are included the same photograph as when the number L29 was assigned and the fish in the picture is one of the paratypes. ...
Globally, ornamental aquaculture is a multi-million-dollar industry and popular hobby. There are circa 6700 fish taxa being exploited and traded. Various species are traded under commercial names or codes such as certain armoured catfish of families Callichthyidae (C and CW codes or numbers) and Loricariidae (L and LDA codes). Many of these species are imported, reared and multiplied in captivity without their species identification. Here we present a detailed survey of this group of armoured catfish with a special focus on pairing of commercial codes with scientific names. In this context, both species with valid names and scientifically undescribed taxa contributed significantly to the total number of ornamental fish species by circa 25%. In total, 176 species of loricariids and 47 species of small callichthyids were paired with codes used in ornamental aquaculture. The total number of loricariids introduced as ornamentals was estimated to be more than 1000 taxa while more than 500 in small callichthyids. We recommend present findings to all stakeholders and especially taxonomists, conservationists and wildlife managers who are focused on this group of Neotropical fishes. Moreover, formal descriptions of unidentified taxa are required for feasible future monitoring and appropriate management measures of wild populations.
... Scobinancistrus aureatus é um peixe da ordem Siluriformes, família Loricariidae, subfamília Hypostominae. O gênero pode ser facilmente diagnosticado pela presença de, no máximo, cinco dentes no dentário e cinco no pré-maxilar, com os dentes do dentário sendo duas vezes maiores que os dentes pré-maxilares (Isbrücker, Nijssen, 1989). A espécie foi descrita por Burgess (1994) com base em dois espécimes, sendo a segunda espécie descrita no gênero Scobinancistrus. ...
... Scobinancistrus aureatus é um peixe da ordem Siluriformes, família Loricariidae, subfamília Hypostominae. O gênero pode ser facilmente diagnosticado pela presença de, no máximo, cinco dentes no dentário e cinco no pré-maxilar, com os dentes do dentário sendo duas vezes maiores que os dentes pré-maxilares (Isbrücker, Nijssen, 1989). A espécie foi descrita por Burgess (1994) com base em dois espécimes, sendo a segunda espécie descrita no gênero Scobinancistrus. ...
... Scobinancistrus aureatus é um peixe da ordem Siluriformes, família Loricariidae, subfamília Hypostominae. O gênero pode ser facilmente diagnosticado pela presença de, no máximo, cinco dentes no dentário e cinco no pré-maxilar, com os dentes do dentário sendo duas vezes maiores que os dentes pré-maxilares (Isbrücker, Nijssen, 1989). A espécie foi descrita por Burgess (1994) com base em dois espécimes, sendo a segunda espécie descrita no gênero Scobinancistrus. ...
... This is partially explained by the presence of putatively new species so far known only from the Jamari River basin, although some of the possible new species listed herein are probably more widespread in the Madeira River basin. Other species, which are already described, have been reported from the Madeira River basin in other papers, dealing with taxonomic revisions or species descriptions: Leporinus bleheri Géry (1999), Petulanos intermedius (Winterbottom 1980) (see Sidlauskas & Santos 2005), Myloplus zorroi Andrade, Jégu & Giarrizzo (2016), Mylossoma albiscopum (Cope 1872) (see Mateussi et al. 2018), Charax pauciradiatus (Günther 1864) (see Menezes & Lucena 2014), Leporacanthicus galaxias Isbrücker & Nijssen (1989), Pimelodus albofasciatus Mees 1974 (see Santos 1996), Satanoperca curupira Ota, Kullander, Deprá, da Graça & Pavanelli (2018). All of the species above have been reported in Brazilian territory, except L. bleheri, which was sampled in the Verde River, on the border between Brazil and Bolivia. ...
The Madeira River is the most extensive tributary of the Amazon River and has the largest diversity of fishes in the world. On its right bank, the Madeira River receives the Jamari River, in which the first hydroelectric power plant (HPP) in State of Rondônia, Samuel HPP, was built. Besides this, other dams were built in the Jamari River and its tributaries, however, the available information in the scientific literature about the ichthyofaunistic diversity of this basin is rare. This work aims to provide an ichthyofaunistic inventory in a region of the Jamari river basin, in the State of Rondônia, where three small hydropower plants (SHPs) were implemented. The ichthyofauna was sampled in 16 expeditions between August 2015 and December 2018. Gill nets and seine nets were used with different meshes, as well as longlines and cast nets at different times of the day. Additionally, 81 INPA lots of species from the Samuel HPP area of influence were reanalyzed. Fish were identified according to the specialized literature, as well as in consultations with experts of various taxonomic groups. Voucher specimens of the species were cataloged and deposited in the ichthyological collection of the Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia) of the Universidade Estadual de Maringá. A total of 230 species were recorded, of which 22 were putative new species, 117 were added to the Jamari River basin and 28 to the Madeira River basin. The continuation of the studies in this section of the Jamari river basin is fundamental for analysis of local impact due to the presence of dams. Moreover, the addition of putative new species to the Madeira River basin indicates gaps in the knowledge of Neotropical ichthyofauna.
... Isbrücker & Nijssen, 1989 ...
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.
A new species of Scobinancistrus from the Xingu River, Brazil, is described. It can be distinguished from its congeners by color pattern and a combination of non-exclusive characters: overall body covered by large yellow spaced blotches over a dark background (vs. small round and densely packed spots over light or dark background in S. pariolispos and S. aureatus); lack of orange to yellow/orange distal band on dorsal and caudal fins (vs. presence in S. aureatus), dorsal fin not reaching adipose-fin supporting plate when adpressed (vs. reaching the adipose-fin plate in S. pariolispos and S. aureatus). The new species is only known from a portion of the middle Xingu River, ranging from the Volta Grande do Xingu, an area under a strong anthropic impact due to the construction of the Belo Monte dam, to near the Iriri River confluence with the Xingu River. Aspects concerning the species’ threats and its conservation status are discussed.
The fishes herein included were collected in four small streams of the upper rio Tapajós basin. Through fieldwork carried out in 2011, 2013 and 2014 during the low water season 1.728 specimens belonging to 22 species distributed in 11 families, and five orders were captured. Characidae was the most representative family both in number of species and specimens captured. The most abundant species were Hyphessobrycon melanostichos, H. hexastichos, and H. notidanos. Five species are recognized as new, and four as endemic to the upper rio Tapajós basin. This study represents the first fish inventory for the region and will provide valuable information for the conservation of the poorly known diversity of fishes of the Chapada dos Parecis, in the headwaters of the upper rio Tapajós basin. © 2016, Universidade Estadual de Campinas UNICAMP. All rights reserved.
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