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New Data on the Clevosaurus (Sphenodontia: Clevosauridae) from the Upper Triassic of Southern Brazil.
PLoS One
May 2016
Seção de Paleontologia, Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Article Synopsis
- The fossil record of sphenodontians in South America is mostly known from Argentina's Mesozoic and Paleogene deposits, primarily featuring opisthodontians related to the extant Sphenodon.
- In contrast, Brazil’s contribution is limited to the Late Triassic Caturrita Formation in Rio Grande do Sul, where several specimens of Clevosauridae, including Clevosaurus brasiliensis, have been found.
- A systematic revision based on the specimen MCN-PV 2852 suggests a need for further phylogenetic analysis of the Clevosauridae family to better understand their evolutionary relationships and distinct species.
[Bioethics and research into mental health].
Cien Saude Colet
April 2011
Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil.
This article discusses research in the field of mental health, examining the ethical is sues involved and the use of Informed Consent. In order to achieve these objectives two main approaches were used: (1) a brief history of the different treatments and research with patients with mental illness or disability; (2) theoretical and conceptual analysis of the main problems concerning the mental health field, namely the notion of vulnerability, responsibility and autonomy and the use of placebo control groups. Two main questions prompted the reflection on whether the patient with a mental disorder can sign an Informed Consent, and whether the use of a placebo is acceptable.
View Article and Find Full Text PDFA late-surviving basal theropod dinosaur from the latest Triassic of North America.
Proc Biol Sci
November 2011
Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013-7012, USA.
The oldest theropod dinosaurs are known from the Carnian of Argentina and Brazil. However, the evolutionary diversification of this group after its initial radiation but prior to the Triassic-Jurassic boundary is still poorly understood because of a sparse fossil record near that boundary. Here, we report on a new basal theropod, Daemonosaurus chauliodus gen.
View Article and Find Full Text PDFGenetic counseling for childless women at risk for Duchenne muscular dystrophy.
Am J Med Genet
October 1999
Departamento de Biologia, Centro de Estudos do Genoma Humano, Universidade de São Paulo, São Paulo, Brazil.
The aim of the present study was to assess the impact of genetic counseling in young women at risk to have Duchenne muscular dystrophy (DMD) children prior to childbearing. A total of 263 potential DMD carriers, who had had genetic counseling and were given different genetic risks, were included in this investigation. Their reproductive outcome and future plans as well as their requests for DNA tests (for carrier detection and prenatal diagnosis) were analyzed according to genetic risk magnitude, comprehension of genetic counseling is- sues, family and personal history, socio-educational level, and subjective opinion about selective abortion.
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