Willian Massaharu Ohara.
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View article: The stream fish fauna of a pristine area in the South Amazon, rio Machado basin, Rondônia
The stream fish fauna of a pristine area in the South Amazon, rio Machado basin, Rondônia Open
This study represents an inventory of fish collected in six small tributaries from the rio Tarumã river, in the Jaru Biological Reserve, middle rio Machado, Vale do Anari town, Rondônia, Brazil. The fieldwork was carried in August 2019 and…
View article: Two exquisite new species of Hoplisoma (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with a discussion on the morphology of the mesethmoid within Corydoradinae
Two exquisite new species of Hoplisoma (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with a discussion on the morphology of the mesethmoid within Corydoradinae Open
A crowdfunding initiative carried out by aquarists allowed us to sample tributaries of the rio Tapajós basin in the surroundings of Jacareacanga and Maués towns, Pará and Amazonas states, respectively, in the Brazilian Amazon. During this …
View article: A new restricted-range Melanorivulus (Cyprinodontiformes: Rivulidae) from the upper rio Guaporé, Chapada dos Parecis, Brazil
A new restricted-range Melanorivulus (Cyprinodontiformes: Rivulidae) from the upper rio Guaporé, Chapada dos Parecis, Brazil Open
A new species of Melanorivulus, belonging to the Melanorivulus zygonectes species group, is described from the rio Galera, a tributary of the right bank of the upper rio Guaporé, Amazon basin, Mato Grosso state, Brazil. It is diagnosed fro…
View article: New banded Leporinus (Characiformes: Anostomidae) from the Madeira River basin, Brazil, and redescription of L. bleheri, based on integrative taxonomy
New banded Leporinus (Characiformes: Anostomidae) from the Madeira River basin, Brazil, and redescription of L. bleheri, based on integrative taxonomy Open
Leporinus bleheri was described for the Guaporé-Iténez basin, in the border between Bolivia and Brazil. More recently, specimens of a similar-looking banded Leporinus were sampled in distinct rivers in the Madeira basin. Herein, we use an …
View article: A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae: Stevardiinae) from the upper rio Juruena, rio Tapajós basin, Chapada dos Parecis, Mato Grosso, Brazil
A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae: Stevardiinae) from the upper rio Juruena, rio Tapajós basin, Chapada dos Parecis, Mato Grosso, Brazil Open
Knodus ytuanama, new species, is described from the upper rio Juruena, rio Tapajós drainage, Amazon basin, Mato Grosso, Brazil. The new species differs from its congeners by presenting the interradial membranes of the caudal fin thickened,…
View article: A new sexually dichromatic miniature Characidium (Characiformes: Crenuchidae) from the rio Guaporé, rio Madeira basin, Brazil, with remarkable morphological novelties to the genus
A new sexually dichromatic miniature Characidium (Characiformes: Crenuchidae) from the rio Guaporé, rio Madeira basin, Brazil, with remarkable morphological novelties to the genus Open
A new miniature species of Characidium is described from the midde rio Guaporé, rio Madeira basin, Rondônia, Brazil. The new species can be readily distinguished from all congeners by the sexual dichromatism, with females having narrow dar…
View article: A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae Stevardiinae) from the upper rio Juruena, rio Tapajós basin, Chapada dos Parecis Mato Grosso, Brazil
A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae Stevardiinae) from the upper rio Juruena, rio Tapajós basin, Chapada dos Parecis Mato Grosso, Brazil Open
This dataset contains the digitized treatments in Plazi based on the original journal article Ferreira, Katiane M., Ohara, Willian Massaharu (2023): A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae Stevardiinae) from…
View article: A new sexually dichromatic miniature Characidium (Characiformes: Crenuchidae) from the rio Guaporé, rio Madeira basin, Brazil, with remarkable morphological novelties to the genus
A new sexually dichromatic miniature Characidium (Characiformes: Crenuchidae) from the rio Guaporé, rio Madeira basin, Brazil, with remarkable morphological novelties to the genus Open
A new miniature species of Characidium is described from the midde rio Guaporé, rio Madeira basin, Rondônia, Brazil. The new species can be readily distinguished from all congeners by the sexual dichromatism, with females having narrow dar…
View article: Fish fauna of moderate altitude from first order stream in upper Rio Machado, Rondônia, Brazil
Fish fauna of moderate altitude from first order stream in upper Rio Machado, Rondônia, Brazil Open
This study represents an inventory of fish collected in a first order tributary of the Igarapé Piracolina at Chapada dos Parecis, upper Rio Machado drainage, Rio Madeira basin, Vilhena, Rondônia, Brazil. The sampled stream is located in mo…
View article: Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111
Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111 Open
An expedition crowdfunded by aquarists to a region of the Brazilian state of Pará drained by the Tapajós and Xingu river basins resulted in the capture of five species of Corydoras from the rio Jamanxim basin, a tributary to the rio Tapajó…
View article: Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111
Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111 Open
An expedition crowdfunded by aquarists to a region of the Brazilian state of Pará drained by the Tapajós and Xingu river basins resulted in the capture of five species of Corydoras from the rio Jamanxim basin, a tributary to the rio Tapajó…
View article: A database of freshwater fish species of the Amazon Basin
A database of freshwater fish species of the Amazon Basin Open
The AmazonFISH - database of freshwater fish species of the Amazon Basin is organised in two sub-datasets and one shapefile. Updated Version of the Database, Version 2 (2022).GeneralDistribution2022_v2.csvCompleteDatabase2022_v2GeneralDist…
View article: A database of freshwater fish species of the Amazon Basin
A database of freshwater fish species of the Amazon Basin Open
The AmazonFISH - database of freshwater fish species of the Amazon Basin is organised in two sub-datasets and one shapefile. Updated Version of the Database, Version 2 (2022).GeneralDistribution2022_v2.csvCompleteDatabase2022_v2GeneralDist…
View article: Inventory of the fish fauna from Laranjinha River, Paranapanema River system, Brazil
Inventory of the fish fauna from Laranjinha River, Paranapanema River system, Brazil Open
This work is the most comprehensive survey of the Laranjinha River´s fishes, a tributary of the Cinzas River, Paranapanema River basin. Throughout its course, there is only a low-height dam, including a transposition system located 98 km f…
View article: A new species of Moenkhausia (Characiformes: Characidae) from the rio Madeira basin, Brazil, with comments on the evolution and development of the trunk lateral line system in characids
A new species of Moenkhausia (Characiformes: Characidae) from the rio Madeira basin, Brazil, with comments on the evolution and development of the trunk lateral line system in characids Open
A new species of Moenkhausia is described from the rio Machado drainage, Amazon basin, Brazil. It is diagnosed from congeners by its color pattern, consisting of the concentration of chromatophores on the anterior portion of body scales, t…
View article: A database of freshwater fish species of the Amazon Basin
A database of freshwater fish species of the Amazon Basin Open
The Amazon Basin is an unquestionable biodiversity hotspot, containing the highest freshwater biodiversity on earth and facing off a recent increase in anthropogenic threats. The current knowledge on the spatial distribution of the freshwa…
View article: Inventory of the fish fauna from Laranjinha River, Paranapanema River system, Brazil
Inventory of the fish fauna from Laranjinha River, Paranapanema River system, Brazil Open
This work is the most comprehensive survey of the Laranjinha River´s fishes, a tributary of the Cinzas River, Paranapanema River basin. Throughout its course, there is only a low-height dam, including a transposition system located 98 km f…
View article: A database of freshwater fish species of the Amazon Basin
A database of freshwater fish species of the Amazon Basin Open
The AmazonFISH - database of freshwater fish species of the Amazon Basin is organised in two sub-datasets and one shapefile. GeneralDistribution.csv: Table containing the species list by sub-drainage with the taxonomic reference names and …
View article: A new species of Eigenmannia Jordan & Evermann (Gymnotiformes: Sternopygidae) from rio Tapajós, Brazil, with discussion on its species group and the myology within Eigenmanniinae
A new species of Eigenmannia Jordan & Evermann (Gymnotiformes: Sternopygidae) from rio Tapajós, Brazil, with discussion on its species group and the myology within Eigenmanniinae Open
A new species of Eigenmannia is described from the rio Mutum, tributary of upper rio Juruena, rio Tapajós basin, Comodoro, Mato Grosso, Brazil. The new species is distinguished from all congeners by coloration pattern, position of the mout…
View article: A new species of Microschemobrycon (Characiformes: Characidae) from Rio Xingu basin, Brazil
A new species of Microschemobrycon (Characiformes: Characidae) from Rio Xingu basin, Brazil Open
A new species of Microschemobrycon with a restricted distribution was recently discovered in the Rio Curuá, Rio Xingu basin, Pará, Brazil. Microschemobrycon cryptogrammus new species can be promptly distinguished from all congeners by the …
View article: Genetic diversity and population structure of Brycon nattereri (Characiformes: Bryconidae): a Neotropical fish under threat of extinction
Genetic diversity and population structure of Brycon nattereri (Characiformes: Bryconidae): a Neotropical fish under threat of extinction Open
Brycon nattereri is an endangered Neotropical fish reported along conserved stretches of the upper Paraná, Tocantins and São Francisco rivers. Populations of this species have been very rare in some Paraná River sub basins. This study anal…
View article: Hyphessobrycon petricolus, a new species of tetra (Characiformes: Characidae) from the rio Madeira basin, Mato Grosso, Brazil
Hyphessobrycon petricolus, a new species of tetra (Characiformes: Characidae) from the rio Madeira basin, Mato Grosso, Brazil Open
Ohara, Willian M., Lima, Flávio C. T., Barros, Bruno S. (2017): Hyphessobrycon petricolus, a new species of tetra (Characiformes: Characidae) from the rio Madeira basin, Mato Grosso, Brazil. Zootaxa 4221 (2): 242-250, DOI: 10.5281/zenodo.2…
View article: A new species of Brachychalcinus (Characiformes: Characidae) from the rio Xingu basin, Serra do Cachimbo, Brazil
A new species of Brachychalcinus (Characiformes: Characidae) from the rio Xingu basin, Serra do Cachimbo, Brazil Open
Brachychalcinus reisi, a new species of characid fish, is described from the rio Curuá, tributary of rio Iriri, rio Xingu basin, Serra do Cachimbo, Pará State, Brazil. The new species can be distinguished from its congeners by the presence…
View article: Phycocharax rasbora, a new genus and species of Brazilian tetra (Characiformes: Characidae) from Serra do Cachimbo, rio Tapajós basin
Phycocharax rasbora, a new genus and species of Brazilian tetra (Characiformes: Characidae) from Serra do Cachimbo, rio Tapajós basin Open
A new genus and species of characid fish is described from rio Braço Norte, a tributary of rio Teles Pires, Tapajós basin, Mato Groso, Brazil. The new taxa can be diagnosed from the remaining characids by a unique combination of characters…
View article: Fishes from the Jaru Biological Reserve, Machado River drainage, Madeira River basin, Rondônia State, northern Brazil
Fishes from the Jaru Biological Reserve, Machado River drainage, Madeira River basin, Rondônia State, northern Brazil Open
This work assessed freshwater fishes collected at 12 stations located along the Tarumã River, middle Machado River, Madeira River basin. The fieldwork took place in May and September 2015 during the high and low water seasons, respectively…
View article: A new species of Brachychalcinus (Characiformes: Characidae) from the rio Xingu basin, Serra do Cachimbo, Brazil
A new species of Brachychalcinus (Characiformes: Characidae) from the rio Xingu basin, Serra do Cachimbo, Brazil Open
This dataset contains the digitized treatments in Plazi based on the original journal volume Garcia-Ayala, James R., Ohara, Willian M., Pastana, Murilo N. L., Benine, Ricardo C. (2017): A new species of Brachychalcinus (Characiformes: Char…
View article: On the type locality of Sorubim trigonocephalus Miranda-Ribeiro, 1920 (Siluriformes: Pimelodidae)
On the type locality of Sorubim trigonocephalus Miranda-Ribeiro, 1920 (Siluriformes: Pimelodidae) Open
Sorubim trigonocephalus was described in 1920 by Alípio de Miranda Ribeiro, based on a single specimen collected in a locality identified as “Porto Velho”, during the "Comissão das Linhas Telegráficas Estratégicas de Mato Grosso ao Amazona…
View article: Wrapped in flames: Corydoras hephaestus, a new remarkably colored species from the Rio Madeira basin (Teleostei: Callichthyidae)
Wrapped in flames: Corydoras hephaestus, a new remarkably colored species from the Rio Madeira basin (Teleostei: Callichthyidae) Open
This dataset contains the digitized treatments in Plazi based on the original journal article Ohara, Willian Massaharu, Tencatt, Luiz F. C., Britto, Marcelo R. (2016): Wrapped in flames: Corydoras hephaestus, a new remarkably colored speci…