Results 11 to 20 of about 3,985 (128)

Anhanguera taxonomy revisited: is our understanding of Santana Group pterosaur diversity biased by poor biological and stratigraphic control? [PDF]

PeerJ, 2017
Background Anhanguerids comprise an important clade of pterosaurs, mostly known from dozens of three-dimensionally preserved specimens recovered from the Lower Cretaceous Romualdo Formation (northeastern Brazil).
Felipe L. Pinheiro, Taissa Rodrigues
doaj   +2 more sources

Correlations in weighted networks [PDF]

, 2006
We develop a statistical theory to characterize correlations in weighted networks. We define the appropriate metrics quantifying correlations and show that strictly uncorrelated weighted networks do not exist due to the presence of structural constraints.
Boguñá, Marián, Pastor-Satorras, R. (Romualdo), 1967-, Serrano Moral, Ma. Ángeles (María Ángeles)   +2 more
core   +7 more sources

Cretaceous Pterosaurs of the Araripe Basin: A Comprehensive Taxonomic Update and Paleobiological Insights [PDF]

Anais da Academia Brasileira de Ciências
More than fifty years after the first discoveries of pterosaurs in the Araripe Basin, this sedimentary unit remains one of the most informative windows into the diversity and biology of these fantastic flying reptiles.
FELIPE L. PINHEIRO, ALEXANDER W.A. KELLNER, JOÃO L. DA SILVA, RUDAH R.C. DUQUE, JULIANA M. SAYÃO, ESAÚ V. DE ARAÚJO, FABIANA R. COSTA, RICHARD BUCHMANN, GABRIELA M. CERQUEIRA, LUCAS CANEJO, VICTOR BECCARI, RENAN A.M. BANTIM, BORJA HOLGADO, RUBI V. PÊGAS   +13 more
doaj   +1 more source

Calcareous nannofossils, biostratigraphy, and paleobiogeography of the Aptian/Albian Romualdo Formation in the Araripe Basin, North-Eastern Brazil

Brazilian Journal of Geology, 2023
The objectives of this study were the biostratigraphic and paleobiogeographic interpretations of the calcareous nannofossil records of the Romualdo Formation (Aptian-Albian) in the south-central portion of the Araripe Basin.
Flávia Azevedo Pedrosa Lemos, Yumi Asakura, Rogério Loureiro Antunes, Rilda Verônica Cardoso de Araripe, Ludmila Alves Cadeira do Prado, Maria Emilia Travassos Rio Tomé, David Holanda de Oliveira, Luiz Ricardo Silva Lobo do Nascimento, Christiano Ng, Alcina Magnólia Franca Barreto   +9 more
doaj   +1 more source

Creation of museums as strategy for preservation of the fossil heritage of Araripe sedimentary basin in Pernambuco, NE, Brazil [PDF]

, 2016
O Araripe pernambucano tem excelentes exposições de rochas da Formação Santana, Bacia Sedimentar do Araripe (PE, CE e PI), reconhecida internacionalmente pelos fósseis de vertebrados, preservados em concreções, considerados entre os mais importantes do ...
Araripe, R. C., Barreto, A. M. F., Brilha, J. B., Carvalho, A. R. A., do Prado, L. C., Duque, R. R. C., Ghilardi, A. M., Pereira, P. A.   +7 more
core   +3 more sources

A New Genus and Species of †Cladocyclidae (Teleostei: †Ichthyodectiformes) from the Lower Cretaceous “Batateira Beds”, Barbalha Formation, Araripe Basin: The First Vertebrate Record in a Still Poorly Explored Fossil Site

Diversity, 2023
The Mesozoic Teleostei †Ichthyodectiformes presents a widespread distribution in marine brackish and freshwater deposits worldwide. The Brazilian fossil record of this group is represented by five nominal genera distributed exclusively in the sedimentary
Diogo de Mayrinck, Alexandre Cunha Ribeiro, Mario Luis Assine, André Luis Durante Spigolon   +3 more
doaj   +1 more source

Disease Localization in Multilayer Networks [PDF]

, 2016
We present a continuous formulation of epidemic spreading on multilayer networks using a tensorial representation, extending the models of monoplex networks to this context.
Cozzo, Emanuele, de Arruda, Guilherme Ferraz, Moreno, Yamir, Peixoto, Tiago P., Rodrigues, Francisco A.   +4 more
core   +4 more sources

New occurrences of fossilized feathers: systematics and taphonomy of the Santana Formation of the Araripe Basin (Cretaceous), NE, Brazil [PDF]

PeerJ, 2016
Here we describe three fossil feathers from the Early Cretaceous Santana Formation of the Araripe Basin, Brazil. Feathers are the most complex multiform vertebrate integuments; they perform different functions, occurring in both avian and non-avian ...
Gustavo M.E.M. Prado, Luiz Eduardo Anelli, Setembrino Petri, Guilherme Raffaeli Romero   +3 more
doaj   +2 more sources

Stratigraphic analysis of Brejo Santo Formation, Araripe Basin, Northeast Brazil: paleogeographic implications [PDF]

Geologia USP. Série Científica, 2013
The Araripe Basin has been the subject of several publications in the recent years, notably with respect to the rich paleontological collection of Brejo Santo, Crato and Romualdo Formations.
Gelson Luís Fambrini, Virginio Henrique de Miranda Lopes Neumann, Cecilia Lima de Barros, Sonia Maria Oliveira Agostinho da Silva, Paulo Cesar Galm, José Acioli Bezerra de Menezes Filho   +5 more
doaj   +1 more source

Fragility and anomalous susceptibility of weakly interacting networks [PDF]

, 2018
Percolation is a fundamental concept that brought new understanding on the robustness properties of complex systems. Here we consider percolation on weakly interacting networks, that is, network layers coupled together by much less interlinks than the ...
Arenas, Alex, Caldarelli, Guido, Cimini, Giulio, Rapisardi, Giacomo   +3 more
core   +3 more sources