Fossil Record
Mostrando 1-12 de 123 artigos, teses e dissertações.
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1. Morphometric analysis in the shells of the planktonic foraminifera Orbulina universa: a source for paleoceanographic information?
Abstract In this study, we describe morphometric analyses of Orbulina universa morphotypes presently found in the Western South Atlantic, and their relation to the upper water thermohaline indexes. We also investigate this relationship under glacial and interglacial conditions between 7.2 and 32 kyr BP. Ten plankton samples distributed between 32º55' and 26
Braz. j. oceanogr.. Publicado em: 27/05/2019
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2. Science and evolution
Abstract Evolution is both a fact and a theory. Evolution is widely observable in laboratory and natural populations as they change over time. The fact that we need annual flu vaccines is one example of observable evolution. At the same time, evolutionary theory explains more than observations, as the succession on the fossil record. Hence, evolution is also
Genet. Mol. Biol.. Publicado em: 28/02/2019
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3. Otomorphs (= otocephalans or ostarioclupeomorphs) revisited
ABSTRACT A morphological revision is presented here on the cohort Otomorpha, a clade currently interpreted as the most primitive among the large supercohort Clupeocephala. Otomorpha is a morphologically heterogeneous group represented by clupei forms , alepocephaliforms, and ostariophysans (gonorynchiforms, cypriniforms, characiforms, siluriforms, and gymnot
Neotrop. ichthyol.. Publicado em: 11/10/2018
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4. New data on the Late Cretaceous lizard Dicothodon bajaensis (Squamata, Borioteiioidea) from Baja California, Mexico reveals an unusual tooth replacement pattern in squamates
Abstract Borioteiioids comprise an extinct family of squamates that inhabited the Northern Hemisphere during the Cretaceous and were characterized by varying patterns of tooth replacement and dental morphology. Understanding the evolution of these tooth replacement patterns has, however, been largely hampered by an extremely fragmentary fossil record. Here w
An. Acad. Bras. Ciênc.. Publicado em: 19/07/2018
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5. Checklist of fossil decapod crustaceans from tropical America. Part I: Anomura and Brachyura
Abstract Our knowledge of fossil crustaceans from the tropics has increased considerably during recent decades, thanks to novel findings and the re-examination of museum specimens. However, several previous records have been misidentified, numerous museum specimens have never been reported, and many new discoveries are yet to be published. Here, we present a
Nauplius. Publicado em: 19/10/2017
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6. The last dinosaurs of Brazil: The Bauru Group and its implications for the end-Cretaceous mass extinction
ABSTRACT The non-avian dinosaurs died out at the end of the Cretaceous, ~66 million years ago, after an asteroid impact. The prevailing hypothesis is that the effects of the impact suddenly killed the dinosaurs, but the poor fossil record of latest Cretaceous (Campanian-Maastrichtian) dinosaurs from outside Laurasia (and even more particularly, North America
An. Acad. Bras. Ciênc.. Publicado em: 2017-09
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7. Shrimps from the Santana Group (Cretaceous: Albian): new species (Crustacea: Decapoda: Dendrobranchiata) and new record (Crustacea: Decapoda: Caridea)
O camarão fóssil Araripenaeus timidus n. gen. n. sp. é o primeiro Penaeoidea fóssil descrito para o Brasil. No presente trabalho ele é descrito, ilustrado e comparado com Paleomattea deliciosa, um Sergestoidea fóssil (Dendrobranchiata), previamente descrito para a mesma região. O material do Cretáceo inferior (Albiano) foi coletado na cidade Jardim,
An. Acad. Bras. Ciênc.. Publicado em: 29/04/2014
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8. Descripción de una nueva especie de bagre marino fósil (Teleostei, Siluriformes, Ariidae) del Mioceno de la provincia de Río Negro, Argentina
Two fossil crania referable to the siluriform fish family Ariidae are described. The specimens come from the Early Late Miocene-Lower Middle Miocene Saladar Member of the Gran Bajo del Gualicho Formation, located at Salinas del Gualicho, Río Negro province, Argentina. The materials are referred to a new species of the recent genus Genidens. The new taxon is
Papéis Avulsos de Zoologia (São Paulo). Publicado em: 2011
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9. Nuevos registros de squamata (reptilia) para el pleistoceno superior del norte de la provincia de Buenos Aires, Argentina
In the present contribution we report several squamate reptiles which come from the Luján Formation (Upper Pleistocene), located at Merlo in the province of Buenos Aires, Argentina. Among the specimens, the first fossil record for the genus and species Anops kingii (Amphisbaenidae) is recovered. Moreover, the presence of undetermined specimens of the genera
Papéis Avulsos de Zoologia (São Paulo). Publicado em: 2011
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10. Megafauna do quaternário tardio dos depósitos cársticos do Alto Vale do Ribeira, sudeste do Estado de São Paulo, Brasil / Late-Quaternary megafauna of the Upper Ribeira karstic area, southeast São Paulo State, Brazil
The carbonate caves of the Upper Ribeira Valley, southeastern São Paulo State, Brazil, preserve abundant fossil record of Pleistocene-Holocene South American megafauna. This work presents a historical review of its paleontological studies, as well as an update taxonomic survey of the megafauna material gathered since the beginning of the explorations in the
Publicado em: 2011
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11. Primera ictiofauna marina del Cretácico Superior (Formación Jaguel, Maastrichtiano) de la provincia de Río Negro, Argentina
This paper describes several fossil teeth coming from marine sediments from the Bajo Trapalcó locality, Río Negro province, Patagonia, Argentina. The ichthyofauna described here is composed by six different chondrichtyan taxa (Serratolamna serrata, Squalicorax pristodontus, Cretalamna appendiculata, Carcharias sp., Odontaspis sp. and cf. Pseudohypolophus m
Papéis Avulsos de Zoologia (São Paulo). Publicado em: 2010
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12. Análise da variação longitudinal do esqueleto axial em Serpentes (Squamata) empregando ferramentas de morfometria geométrica / Analysis of the longitudinal variation in the axial skeleton of Serpentes (Squamata) using geometric morphometrics techniques
As cobras são um grupo de vertebrados extremamente bem sucedido. Apesar da aparente simplicidade, elas conseguiram ocupar uma grande diversidade de habitats. O esqueleto axial das serpentes apresenta relação com vários aspectos da vida que puderam ter tido influência direta em seu sucesso evolutivo. Além disso, a forma dos elementos vertebrais possui v
Publicado em: 2010