Background: The Triatomini and Rhodniini (Hemiptera: Reduviidae) tribes include the most diverse Chagas disease vectors; however, the phylogenetic relationships within the tribes remain obscure. This study provides the most comprehensive phylogeny of Triatomini reported to date. Methods: The relationships between all of the Triatomini genera and representatives of the three Rhodniini species groups were examined in a novel molecular phylogenetic analysis based on the following six molecular markers: the mitochondrial 16S; Cytochrome Oxidase I and...
Data from: Cellular basis of morphological variation and temperature-related plasticity in Drosophila melanogaster strains with divergent wing shapesLibéria Souza Torquato, Daniel Mattos, Bruna Palma Matta & Blanche Christine Bitner-Mathé
Organ shape evolves through cross-generational changes in developmental patterns at cellular and/or tissue levels that ultimately alter tissue dimensions and final adult proportions. Here, we investigated the cellular basis of an artificially selected divergence in the outline shape of Drosophila melanogaster wings, by comparing flies with elongated or rounded wing shapes but with remarkably similar wing sizes. We also tested whether cellular plasticity in response to developmental temperature was altered by such selection. Results show...
Data from: Atolchelys lepida, a new side-necked turtle from the Early Cretaceous of Brazil and the age of crown PleurodiraPedro S. R. Romano, Valéria Gallo, Renato R. C. Ramos & Luzia Antonioli
We report a new pleurodiran turtle from the Barremian Morro do Chaves Formation, Sergipe-Alagoas Basin, Brazil. We tested the phylogenetic position of Atolchelys lepida gen. et sp. nov. by including it in a comprehensive cladistic analysis of pleurodires. The new species is a basal member of Bothremydidae and simultaneously the oldest unambiguous crown Pleurodira. The biogeographic and chronostratigraphic significance of the finding has implications for the calibration of molecular clocks studies by pushing back the...
Data from: Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predationMarcio S Araujo, S Ivan Perez, Maria Julia C Magazoni & Ana Cristina Petry
Background: Phenotypic diversity among populations may result from divergent natural selection acting directly on traits or via correlated responses to changes in other traits. One of the most frequent patterns of correlated response is the proportional change in the dimensions of anatomical traits associated with changes in growth or absolute size, known as allometry. Livebearing fishes subject to predation gradients have been shown to repeatedly evolve larger caudal peduncles and smaller cranial regions under high...
Data from: Patterns of gene flow in Encholirium horridum L.B.Sm., a monocarpic species of Bromeliaceae from BrazilKarina Vanessa Hmeljevski, Maurício Sedrez Dos Reis & Rafaela Campostrini Forzza
Encholirium horridum is a bromeliad that occurs exclusively on inselbergs in the Atlantic Forest biome of Brazil. These rock outcrops form natural islands that isolate populations from each other. We investigated gene flow by pollen through paternity analyses of a bromeliad population in an area of approximately 2 ha in Espírito Santo State, Brazil. To that end, seed rosettes and seedlings were genotyped using nuclear microsatellite loci. A plot was also established from the same...
Federal University of Rio de Janeiro5
Sao Paulo State University1
University of Brasília1
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro1
National Scientific and Technical Research Council1
Universidade Federal de Viçosa1
Universidade Federal de Santa Catarina1
Faculdades Oswaldo Cruz1
Federal University of the State of Rio de Janeiro1