Conchostráceos Palaeolimnadiopsis (Spinicaudata, Crustacea) do grupo Bauru (cretáceo superior, bacia Bauru): Taxonomia, paleoecologia e paleobiogeografia

The present study presents a taxonomic review of Palaeolimnadiopsis suarezi Mezzalira described in Bauru Group. The geographic and stratigraphic distribution of the genus Palaeolimnadiopsis is widespread, including occurrences in several countries as Brazil, Bolivia, Chile, Uruguay, USA, Congo, China, Australia, Tasmania, Russia, Germany, Scottland, France and Belgium, in rocks from the Devonian to the Cretaceous. This taxon was probably eurytopic, with a high dispersal potential and very conservative in evolution. One specimen identified as Palaeolimnadiopsis sp. is much larger than the average (~3.5 cm long), presenting relatively wide and few growth bands. The gigantism of this specie may be related to conditions that excluded potential predators and competitors from the environment, as is indicated by the presence of more saline and/or alkaline water conditions than in normal fresh water suggested a relatively high proportion of carbonates in that region and stratigraphic interval. © 2013 by the Sociedade Brasileira de Paleontologia.

O grupo araxá na região sul-sudoeste do estado de goiás

In the S - SW region of Goiás State, Brazil, the Araxá Group is constituted of a metasedimentary sequence containing schistose and gneissic (garnet-biotite-quartz schists, feldspatic garnet-biotite-quartz schists, garnet-biotite-quartz paragneisses, with muscovite and locally amphibole, epidote, kyanite and staurolite. This sequence presents intercalations of metaul-tramafc rocks (serpentinite, actinolite schist, talc schist, chlorite schist), metamafc ones (amphibolite, amphibole schist containing or not garnet, garnet amphibolite) and associated granitic bodies. Chemically, the Araxá Group metasediments present peraluminous composition, showing enrichment in LILE, when compared with HFSE and REE, and displaying negative anomalies of Nb, Ta, Sr, P and Ti. Their chemical composition is that of greywake and the chemical characteristics of the sediments are generated in magmatic arcs. Isotopic data for Sm/Nd - model ages (TDM) between 1,04 - 1,51 and 1,76 - 2,26 Ga - and U/Pb (predominance of zircon with ages < 900 Ma) suggest that these metasediments have Neoproterozoic rocks as the source rocks. Chemical and isotopic characteristics of the studied metasediments suggest that their source are rocks originated in magmatic arcs and that they were deposited in a fore arc basin developed in the margins of Neoproterozoic island arcs.

Desempenho produtivo e qualidade pós-colheita de genótipos de feijão do grupo comercial carioca cultivados na época de inverno-primavera

The objective of this work was to evaluate the agronomic performance and grain quality, especially the grain technological characteristics in the common bean genotypes, cultivated in winter-spring season. The experiment was carried out in Jaboticabal-SP, in a Rhodic Hapludox. The experimental design was a randomized block with 17 treatments (genotypes) with three replications. The plots had been composed for 17 carioca common bean group genotypes (Pérola, BRS Cometa, BRS Pontal, IPR Juriti, CNFC 10703, CNFC 10713, CNFC 10716, CNFC 10721, CNFC 10729, CNFC 10733, CNFC 10742, CNFC 10753, CNFC 10757, CNFC 10758, CNFC 10762, CNFC 10763 and CNFC 10813). BRS Pontal and CNFC 10716 showed simultaneously the higher number of per plant and grain yield. The technological characteristics more expressive was verified in CNFC 10703, CNFC 10713, CNFC 10758, CNFC 10813 and CNFC 10716 genotypes, principally about the protein content, cooking time and grain hydration capacity. The CNFC 10716 genotype detached as promissory, because their elevated agronomic performance and satisfactory technological characteristics.