30 documents found, page 1 of 3
Uncovering the diversity in the amazophrynella minuta complex: Integrative taxo...
Rojas, Rommel R.; Chaparro, Juan Carlos; Carvalho, Vinícius Tadeu de; Ávila, Róbson Waldemar; Farias, Izeni P.; Hrbek, Tomas; Gordo, MarceloA new species of the genus Amazophrynella (Anura, Bufonidae) is described from the departments of Madre de Dios, Cusco and Junin in Peru. An integrative taxonomy approach is used. A morphological diagnosis, morphometrics comparisons, description of the advertisement call, and the phylogenetic relationships of the new species are provided. Amazophrynella javierbustamantei sp. n. differs from other species of Ama...
A Pan-Amazonian species delimitation: High species diversity within the genus A...
Rojas, Rommel R.; Fouquet, Antoine; Ron, Santiago R.; Hernández-Ruz, Emil José; Melo-Sampaio, Paulo Roberto; Chaparro, Juan Carlos; Vogt, Richard CarlAmphibians are probably the most vulnerable group to climate change and climatechange associate diseases. This ongoing biodiversity crisis makes it thus imperative to improve the taxonomy of anurans in biodiverse but understudied areas such as Amazonia. In this study, we applied robust integrative taxonomic methods combining genetic (mitochondrial 16S, 12S and COI genes), morphological and environmental data to...
Remarkable geographic structuring of rheophilic fishes of the lower Araguaia River
Hrbek, Tomas; Meliciano, Natasha V.; Zuanon, Jansen; Farias, Izeni P.Rapids and waterfalls, and their associated fauna and flora are in peril. With the construction of each new hydroelectric dam, more rapids and waterfalls are destroyed, leading to the disappearance of associated fauna and flora. Areas of rapids harbor distinct, highly endemic rheophilic fauna and flora adapted to an extreme environment. Rheophilic habitats also have disjunct distribution both within and across ...
One thousand DNA barcodes of piranhas and pacus reveal geographic structure and...
Machado, Valéria Nogueira; Collins, Rupert A.; Ota, Rafaela Priscila; Andrade, Marcelo C.; Farias, Izeni P.; Hrbek, TomasPiranhas and pacus (Characiformes: Serrasalmidae) are a charismatic but understudied family of Neotropical fishes. Here, we analyse a DNA barcode dataset comprising 1,122 specimens, 69 species, 16 genera, 208 localities, and 34 major river drainages in order to make an inventory of diversity and to highlight taxa and biogeographic areas worthy of further sampling effort and conservation protection. Using four m...
A new species of river dolphin from Brazil or: How little do we know our biodiv...
Hrbek, Tomas; Silva, Vera Maria Ferreira da; Dutra, Nicole C.L.; Gravena, Waleska; Martin, Anthony Richard; Farias, Izeni P.True river dolphins are some of the rarest and most endangered of all vertebrates. They comprise relict evolutionary lineages of high taxonomic distinctness and conservation value, but are afforded little protection. We report the discovery of a new species of a river dolphin from the Araguaia River basin of Brazil, the first such discovery in nearly 100 years. The species is diagnosable by a series of molecula...
Parental care of Chestnut-capped Puffbird Bucco macrodactylus on the middle Jur...
Leite, Gabriel Augusto; Farias, Izeni P.; Peres, Carlos A.Chestnut-capped Puffbird Bucco macrodactylus, like other members of the Bucconidae family, nest in arboreal termitaria. Here we described a nest of the species, found in the floodplain of the Juruá River in December 2014. It was built inside an arboreal termite mound, 2.45 m above the ground. We determined the type and frequency of prey consumed by chicks over six days: during this time adults brought food to t...
Evidence of multiple paternity and cooperative parental care in the so called m...
Verba, Júlia Tovar; Gurgel, Rabello Neto, José; Zuanon, Jansen; Farias, Izeni P.Monogamy is rare in fishes and is usually associated with elaborate parental care. When parental care is present in fishes, it is usually the male that is responsible, and it is believed that there is a relationship between the high energetic investment and the certainty of paternity (except in the case of sneaker males). Osteoglossum bicirrhosum is considered a monogamous fish, and has particular behavioral tr...
Rivers acting as barriers for bird dispersal in the Amazon
Fernandes, Alexandre Mendes; Cohn-Haft, Mario; Hrbek, Tomas; Farias, Izeni P.Morphological, vocal and genetic studies have shown that the Madeira River and its right bank tributaries delimit populations of primates and birds. We sequenced the cytochrome b gene (approx. 950 bp) for individuals of three suboscine passerine bird species, Glyphorynchus spirurus (Furnariidae), Willisornis poecilinotus (Thamnophilidae) and Schiffornis turdina (Tityridae), on opposite banks of the Madeira Rive...
The Munduruku marmoset: A new monkey species from southern Amazonia
Costa-Araújo, Rodrigo; Melo, Fabiano Rodrigues de; Canale, Gustavo Rodrigues; Hernández-Rangel, Sandra Marcela; Messias, Mariluce RezendeAlthough the Atlantic Forest marmosets (Callithrix spp.) are among the best studied Neotropical primates, the Amazonian marmosets (Callibella humilis, Cebuella spp. and Mico spp.) are much less well-known. Even species diversity and distributions are yet to be properly determined because field data and materials currently available in scientific collections do not allow comprehensive taxonomic studies of Amazon...
Comparative cytogenetics of two of the smallest Amazonian fishes: Fluviphylax s...
Souza, E. R.; Braga Ribeiro, Leila; Feldberg, Eliana; Farias, Izeni P.; Hrbek, Tomas; Gross, Maria ClaudiaThe genus Fluviphylax Whitley, 1965 is comprized of five valid species (F. pygmaeus Myers et Carvalho, 1955, F. zonatus, F. simplex, F. obscurus Costa, 1996, and F. palikur Costa et Le Bail, 1999), which are endemic to the Amazon region. These fishes are the smallest known South American vertebrates and among the smallest know vertebrates on Earth. All species but the type F. pygmaeus have been described in lat...