Results 21 to 30 of about 4,072 (171)

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

An Unusual Fossiliferous Site in the Romualdo Formation in the Socorro Basin (Northeast Brazil)

Anuário do Instituto de Geociências, 2023
The Santana Group, from the base to the top, comprises the Barbalha, Crato, Ipubi, and Romualdo formations. Calcareous concretions from the Romualdo Formation are found in the Araripe Basin, but the geographic extension of this sequence has evidence in the Socorro Basin on the border of the state of Pernambuco; however, these areas outside of the ...
Olga Alcântara Barros, Antônio Álamo Feitosa Saraiva, Juliana Trindade Marques de Oliveira, Edilson Bezerra Dos Santos Filho, Ana Maria de Souza Alves, Flaviana Jorge de Lima, Renan Alfredo Machado Bantim   +6 more
openaire   +1 more source

First record of an amniotic egg from the Romualdo Formation (Lower Cretaceous, Araripe Basin, Brazil)

Revista Brasileira de Paleontologia, 2020
Fossil amniotic eggs have great informative potential, especially regarding reproductive and evolutionary aspects of vertebrates. However, there are only few intact specimens or with fossilized embryos within, and the rare reported cases are mostly related to dinosaurs.
Dayanne Abreu, Maria Somália Sales Viana, Paulo Víctor de Oliveira, Gustavo Fernandes Viana, Diva Maria Borges Nojosa   +4 more
openaire   +4 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

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

An unusual edentulous pterosaur from the Early Cretaceous Romualdo Formation of Brazil

Historical Biology, 2014
Numerous taxa make up the Early Cretaceous fauna of Brazil, including Ornithocheiroidea, Tapejaridae, Thalassodromidae, Chaoyangopteridae and a purported member of Azhdarchidae. Dsungaripteridae has only been tentatively assumed to be present in the form of ‘Santanadactylus’ spixi.
Headden, Jaime A., Hebert B.N. Campos
openaire   +1 more source

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

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

Activity driven modeling of time varying networks [PDF]

, 2012
Network modeling plays a critical role in identifying statistical regularities and structural principles common to many systems. The large majority of recent modeling approaches are connectivity driven.
A Lloyd, A Vespignani, A Vespignani, A-L Barabási, A-L Barabási, A-L Barabási, C Butts, C Butts, C Castellano, D Balcan, D Brockmann, D Centola, D Lazer, E Volz, G Ghoshal, H-H Jo, I Schwartz, J Moody, J-P Onnela, L Isella, LB Shaw, M Boguña, M Molloy, M Morris, MC González, MEJ Newman, O Frank, P Erdös, P Holland, R Albert, R Albert, S Boccaletti, S Fortunato, S Wasserman, SN Dorogovtsev, WO Kermack   +35 more
core   +3 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