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Registros recuperados: 41
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A new armored catfish species of the genus Hypostomus Lacépède, 1803 (Siluriformes: Loricariidae) from the upper rio Xingu basin, Brazil Neotropical Ichthyology
Zawadzki,Cláudio H.; Birindelli,José L. O.; Lima,Flávio C. T..
A new armored catfish species of the genus Hypostomus is described from the upper rio Xingu basin, Mato Grosso State, Brazil. The new species is diagnosed from congeners by having high number of teeth (58 to 101, mean 77 on premaxilla, and 58 to 105, mean 80 on dentary), dark spots over body and fins, and abdomen mostly naked. The new species is known from the rapids of the rio Culuene, where it is sympatric with Hypostomus faveolus.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Cascudo; Hypostominae; Rio Culuene; Systematics.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200003
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A new characid fish, Hyphessobryconhexastichos (Characiformes: Characidae) from Chapada dos Parecis, Mato Grosso, Brazil Neotropical Ichthyology
Bertaco,Vinicius A.; Carvalho,Tiago P..
A new characid species, Hyphessobrycon hexastichos, is described from the upper rio Tapajós, Mato Grosso, Brazil. The new species is distinguished from all other Hyphessobrycon species by the presence of black zigzag longitudinal lines between longitudinal rows of scales in the lateral of body, maxilla with 3-5 teeth, i,6 pelvic-fin rays, 18-22 branched anal-fin rays, 4 scale rows above and 3 scale rows below of lateral line, lateral line with 9-13 perforated scales, and 33-35 scales in a longitudinal series.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical; Amazon basin; Rio Tapajós; Rio Juruena; Central Brazil; Taxonomy.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000300013
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A new species of Aphanotorulus (Siluriformes: Loricariidae) from the rio Aripuanã basin, Brazil Neotropical Ichthyology
Oliveira,Andreza S.; Py-Daniel,Lúcia Rapp; Zawadzki,Cláudio H..
ABSTRACT The cis-Andean genus Aphanotorulus was recently revised and comprises six valid species: A. ammophilus, A. emarginatus, A. gomesi, A. horridus, A. phrixosoma and A. unicolor. Herein, a new species is described from tributaries of the rio Aripuanã basin, in Amazonas and Mato Grosso states, Brazil. The new species is easily distinguished from congeners by its color pattern: caudal fin with upper lobe mostly hyaline with dark spots along rays and membranes, and lower lobe red and without dark spots; and absence of dark spots in the lateral series of mid-ventral plates.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Fishes; Hypostominae; Taxonomy.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100208
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A new species of Astyanax (Characiformes: Characidae) from the rapids of the lower rio Xingu, Brazil Neotropical Ichthyology
Lima,Flávio C.T.; Zuanon,Jansen.
Astyanax dnophos, new species, is described from the lower rio Xingu, Pará, Brazil. The new species is distinguished from its purported congeners by the presence of a broad longitudinal, midlateral dark stripe that extends from the snout to the caudal peduncle. Astyanax dnophos dwells on shadowed, rocky shelters on rapids, and it is apparently one of the few species of Characidae outside Serrasalminae reported to be rheophilic.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rheophily; Amazon basin; Taxonomy; Longitudinal stripe; Rocky shelter.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300002
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A new species of Hemibrycon (Teleostei: Characiformes: Characidae) from the río Ucayali drainage, Sierra del Divisor, Peru Neotropical Ichthyology
Bertaco,Vinicius A.; Malabarba,Luiz R.; Hidalgo,Max; Ortega,Hernán.
A new characid species, Hemibrycon divisorensis, is described from the río Ucayali drainage, Loreto, Peru. The new species is distinguished from all Hemibrycon species by the presence of a wide black asymmetrical spot covering base of caudal-fin rays and extending along entire length of caudal-fin rays 9 to 12-13 (except from H. surinamensis), and a black band in the lower half of the caudal peduncle extending from the region above the last anal-fin rays to the caudal-fin base. Furthermore, it is distinguished from most species of the genus by the number of scale rows below the lateral line (4-5 vs 5-9), except H. jabonero, H. microformaa, H. orcesi, and H. surinamensis. It differs from these species by scale and fin ray counts and color pattern. The lack...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical; Amazon basin; Taxonomy; Supraorbital; Fin hooks; Carlastyanax.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300003
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A new species of Moenkhausia Eigenmann (Characiformes: Characidae) from the rio Xingu basin, Brazil Neotropical Ichthyology
Marinho,Manoela M. F..
A new species of Moenkhausia from the upper rio Xingu basin is described. Moenkhausia eurystaenia is distinguished from all congeners, except M. heikoi and M. phaeonota, by the presence of a dark, broad longitudinal stripe from the opercle to the end of caudal peduncle. The new species is distinguished from M. heikoi mainly by having 18-21 branched anal-fin rays (vs. 24-26) and the absence of a round blotch at the end of the caudal peduncle (vs. present). Moenkhausia eurystaenia can be distinguished from M. phaeonota mainly by the anterior portion of longitudinal band darker at horizontal septum (vs. darker below horizontal septum), the deep dark pigmentation along horizontal septum extending anteriorly up to humeral region (vs. extending up to vertical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Systematics; Tetra; Amazon basin; Taxonomy.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000300011
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A new species of Moenkhausia Eigenmann (Characiformes: Characidae) from the upper rio Machado at Chapada dos Parecis, rio Madeira basin, Brazil Neotropical Ichthyology
Ohara,William M.; Marinho,Manoela M. F..
ABSTRACT A new species of Moenkhausia is described from the upper rio Machado at Chapada dos Parecis, rio Madeira basin, Rondônia State, Brazil. Among congeners, the new species is similar to Moenkhausia chlorophthalma, M. cotinho , M. lineomaculata , M. plumbea, and M. petymbuaba by having dark blotches on the anterior portion of the body scales, which are absent in the remaining species of the genus. The new speciesdiffers from aforementioned species by possessing blue eyes in life, 15-18 branched anal-fin rays, and a well-defined, round caudal-peduncle spot that does not reach the upper and lower margins of the caudal peduncle and does not extend to the tip of the middle caudal-fin rays.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Fish; Moenkhausia cotinho; Ostariophysi; Taxonomy.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100001
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A new species of Protoptila Banks (Trichoptera: Glossosomatidae: Protoptilinae) from Brazil Acta Amazonica
Santos,Allan Paulo Moreira; Nessimian,Jorge Luiz.
A new species of Protoptila Banks (Trichoptera: Glossosomatidae: Protoptilinae) - P. longispinata sp. nov. - is described and illustrated from specimens collected in Amazon region, Amazonas and Pará states, Brazil.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Protoptila longispinata sp. nov.; Neotropical Region; Taxonomy.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000300030
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A new species of the genus Kingsleya from Amazonia, with a modified key for the Brazilian Pseudothelphusidae (Crustacea: Decapoda: Brachyura) Naturalis
Magalhaes, C..
Abstract: A new species of Pseudothelphusid crab, Kingsleya besti spec. nov., is described from Serra do Curicuriari, northwest of the State of Amazonas, Brazil. A modified dey for identification of the Pseudothelphusid crabs occurring in Brazil is given. Resumo: É descrita uma nova espécie de caranguejo da família Pseudothelphusidae, Kingsleya besti spec. nov., da Serra do Curicuriari, noroeste do Estado do Amazonas, Brasil. É fornecida uma chave de identificação modificada para as espécies de caranguejos desta família registradas para o Brasil.
Tipo: Article / Letter to the editor Palavras-chave: Taxonomy; Kingsleya besti spec. nov. (Brachyura: Pseudothelphusidae); Description; Amazon basin; Brazil; 42.74.
Ano: 1990 URL: http://www.repository.naturalis.nl/record/318653
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A new species of the Hypostomus cochliodongroup (Siluriformes: Loricariidae) from the rio Aripuanã basin in Brazil Neotropical Ichthyology
Zawadzki,Cláudio H.; Carvalho,Pedro Hollanda.
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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Catfish; Hypostominae; Neotropical fishes; Taxonomy.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100043
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A preliminary survey of the fish fauna in the vicinity of Santa Ana del Yacuma in Bolivia (río Mamoré drainage) Biota Neotropica
Hablützel,Pascal István.
The inventory of fish species of the río Mamoré sub-drainage in the Bolivian Amazon is far from being complete. This article informs about a small scale species inventory in the close vicinity of the town Santa Ana del Yacuma (drained by the río Yacuma, a left side tributary of the río Mamoré). Sampling four habitat types, 615 fish specimens belonging to 101 species were collected. Four species were reported for the first time from the río Mamoré sub-drainage: Aphyocharax rathbuni, Apistogramma erythrura, Apistogramma similis and Hyphessobrycon elachys. Differences in species composition among sampled habitats stress the importance of including a high number of collecting sites across biotic and abiotic environmental gradients to reliably survey species...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish inventory; Distribution; First record; Amazon basin; Fish diversity; Río Yacuma; Río Mamoré; Bolivia.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000400017
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A small new species of Crenicichla Heckel, 1840 from middle rio Xingu, Brazil (Teleostei: Cichlidae) Neotropical Ichthyology
Ito,Priscila Madoka M.; Py-Daniel,Lúcia H. Rapp.
A new species of Crenicichla is described from the middle rio Xingu and tributaries, upstream from Volta Grande do Xingu. The largest specimen measured 47.8 mm SL. The new speciescan be distinguished from all other Crenicichla species by the combination of the following character states: presence of serrae on supracleithrum (diagnostic of Crenicichla wallacii species group), large caudal blotch centrally located on caudal lateral line (shared with C. urosema and C. virgatula ), vertical dark stripes on the caudal fin and up to three series of teeth on premaxilla and maxilla (vs. more than four series of teeth). The new species described hereinis the eleventh species of Crenicichla listed from the rio Xingu basin. Similarities of color pattern among small...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Freshwater fishes; Morphology; Rio Bacajá; Taxonomy.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300471
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Assessment of the decapod crustacean diversity in the Guayana Shield region aiming at conservation decisions Biota Neotropica
Magalhães,Célio; Pereira,Guido.
The current state of knowledge of freshwater decapod crustacean diversity of the Guayana Shield Region is briefly assessed, based upon information gathered from the scientific literature as well as unpublished data from academic theses, technical reports, and carcinological collections. The decapod fauna of the region is presently known to include 64 species and subspecies within six families and 17 genera. Diversity by countries, basins, and rivers is listed, comments on endemic, rare or threatened species are made, and information about relevant taxonomic literature is presented. Seven priority areas for conservation actions concerning crustacean decapods are suggested and related to the 25 priority areas defined by the Fishes and Freshwater Working...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Checklist; Freshwater crabs; Freshwater shrimps; Amazon basin; Orinoco basin.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000200013
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Betrequia ocellata Oldroyd (Diptera, Tabanidae, Rhinomyzini) blood feeding on Caiman crocodilus (Linnaeus) (Crocodylia, Alligatoridae) in Manaus, Brazil Zoologia
Henriques,Augusto Loureiro; Ferreira,Ruth Leila Menezes; Vidal,João Ferreira; Rafael,José Albertino.
In Central Amazonia the tabanid Betrequia ocellala Oldroyd, 1970 was recorded for the first time blood feeding on caimans during an experiment in September/October 1996 at Ducke Reserve, Manaus, Brazil. Among different available hosts (Caiman, horse, duck and human) B. ocellata was observed only on Caiman crocodilus (Linnaeus, 1758), suggesting specific blood feeding on crocodilians. The adult flight season, diurnal blood feeding period and flight stratification are presented. Other tabanid species feeding or landing on caimans are also recorded.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diptera; Tabanidae; Chrysopsinae; Rhinomyzini; Betrequia ocellata; Amazon basin; Hematophagy; Caiman; Alligatoridae.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000300007
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Checklist of the fishes from Jamari River basin, in areas under influence of dams, Rondônia, Brazil Biota Neotropica
Oliveira,Rianne Caroline de; Deprá,Gabriel de Carvalho; Zawadzki,Cláudio Henrique; Silva,João Carlos Barbosa da; Graça,Weferson Júnio da.
Abstract: 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....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diversity; Species list; Madeira River; Amazon basin; Freshwater fish.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100304
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Chrysobrycon yoliae, a new species of stevardiin (Characiformes: Characidae) from the Ucayali basin, Peru Neotropical Ichthyology
Vanegas-Ríos,James Anyelo; Azpelicueta,María de las Mercedes; Ortega,Hernán.
Chrysobrycon yoliae, new species, is described from a drainage flowing into the río Yucamia basin, río Ucayali basin, Peru. Chrysobrycon yoliaeis readily distinguished from its congeners by the anterior tip of pelvic bone situated anterior to the fifth rib (vs. situated posterior to the fifth rib), the presence of 20-26 dentary teeth (vs. 11-19), and the possession of a terminal lateral-line tube between caudal-fin rays 10 and 11 (vs. the absence of this tube, except in C. eliasi). The new species differs from C. eliasiand C. myersiby the presence of teeth on third pharyngobranchial (vs. the absence of teeth on this bone) and also differs from C. eliasiby the dorsal-fin origin situated at vertical through anal-fin rays 5 to 7 (vs. located at vertical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Xenurobryconini; Pit organs; Amazon basin; Pouch scale; Sexual dimorphism.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000200291
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Cytogenetic and DNA barcoding reveals high divergence within the trahira, Hoplias malabaricus (Characiformes: Erythrinidae) from the lower Amazon River Neotropical Ichthyology
Marques,Diego Ferreira; Santos,Fabíola Araújo dos; Silva,Simoni Santos da; Sampaio,Iracilda; Rodrigues,Luís Reginaldo Ribeiro.
Molecular and cytogenetic data have provided evidence of cryptic speciation in the widespread South American trahira, Hoplias malabaricus. In the present study, karyotypes and DNA barcode sequences of specimens from seven populations inhabiting the lower Amazon River were analyzed in order to characterize the levels of genetic divergence within a single karyomorph. All the specimens presented karyotypes with 2n = 40 chromosomes (20m+20sm) that were consistent with the species' C karyomorph. The DNA barcodes revealed six haplogroups, with clear divergence between populations from Brazil and Argentina. The results support the species complex hypothesis and indicate that a single karyomorph of H. malabaricus may harbor more than one species
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; COI; Karyomorph; Species complex; Trahiras.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200459
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Deficient downstream passage through fish ladders: the case of Peixe Angical Dam, Tocantins River, Brazil Neotropical Ichthyology
Pelicice,Fernando Mayer; Agostinho,Carlos Sérgio.
Downstream passage through fish ladders and other facilities remains largely uninvestigated in South America. In view of this concern, we monitored ascending and descending fish movements through the fish ladder at Peixe Angical Dam, upper Tocantins River, Brazil, between September 2009 and August 2010. To investigate the extent of downstream passage, the fish fauna was sampled monthly (i) at sites upstream and downstream from the dam and (ii) inside the ladder. To distinguish between ascending and descending movements, the fish ladder remained open (permanent water flow), but a screen blocked the complete passage of fish in both directions. The results of the study indicated that the ladder restricts fish movements in both directions. Few species were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Conservation; Management; Migratory fish; One-way movements.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400003
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Description of a new species of Parancistrus (Siluriformes: Loricariidae) from the rio Xingu, Brazil Neotropical Ichthyology
Rapp Py-Daniel,Lúcia H.; Zuanon,Jansen.
Parancistrus nudiventris, new species, is described and compared with the congener P. aurantiacus. The new species has only been recorded from rio Xingu and can be distinguished from P. aurantiacus by having a naked abdomen (plated in P. aurantiacus), the presence of bluish dots in living specimens or spotted in preserved specimens (uniformly dark or clear brown or mottled, never spotted in P. aurantiacus), larger interbranchial distance (39-56% in HL vs. 24.9-39.5% in P. aurantiacus), narrower interorbital distance (26.8-38% in HL vs. 38.5-43.1% in P. aurantiacus). Parancistrus nudiventris also has buccal teeth more conspicuous than in P. aurantiacus. Main skeletal differences include the presence of a strong condyle on the lateral ethmoid for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Parancistrus nudiventris; Freshwater fishes; Amazon basin; Natural History; Neotropical catfishes.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400014
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Distributional patterns in Brazilian Serjania (Sapindaceae) Acta Botanica
Acevedo-Rodriguez,Pedro.
The present paper analyzes the distribution of Serjania in Brazil, by comparing and contrasting the species occuring in three major phytogeographic regions: the Atlantic coast, the planalto, and the Amazon basin. The Atlantic coast region has the highest percent (70%) of species endemic to the area, and shares many species with the planalto region. The planalto region shares most of its species with the Atlantic coast and the neighboring countries, but still has a 33% of endemic species to the area. The Amazon basin has only a 4% of species endemic to the area, with most of the reminder species widely distributed through-out the area.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Serjania; Brazil; Mata Atlântica; Planalto; Amazon basin; Endemics; Cerrado; Gallery forest; Campos; Terra-firme; Forest; Restinga.
Ano: 1990 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061990000100005
Registros recuperados: 41
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