Results 21 to 30 of about 4,825,269 (154)

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

Cassiopidae gastropods, influence of Tethys Sea of the Romualdo Formation (Aptian–Albian), Araripe Basin, Brazil

Journal of South American Earth Sciences, 2016
Abstract The Cassiopidae family belongs to a group of gastropods of the Tethyan Realm, whose origin and dispersion are related a transgression of the Tethys Sea during the Early Cretaceous. The Romualdo Formation in the Araripe Basin, located in Northeast Brazil, presents fossil assemblages with echinoids, bivalves and cassiopid gastropods ...
Priscilla Albuquerque Pereira, Rita de Cassia Tardin Cassab, Alcina Magnólia Franca Barreto   +2 more
openaire   +2 more sources

Data set from Aptian Romualdo Formation

, 2020
These data are from geochemical analysis used from Paleoenvironmental evolution of the Aptian Romualdo Formation, Araripe Basin, northeaster Brazil. These results are submitted to Global and Planetary Change. With these data we show environmental changes
Cristianini T. Bergue, Guilherme Krahl, Daiane Ceolin, Gerson Fauth, Marcello G.Simões, Mario L. Assine, Marlone H. H. Bom, Karlos G. D. Kochhann, Jairo F. Savian, Oscar S. Junior   +9 more
core   +1 more source

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.
A. Headden, Jaime, B.N. Campos, Hebert
openaire   +1 more source

The Families Veneridae, Trochidae, Akeridae and Acteonidae (Mollusca), in the Romualdo Formation: Paleoecological and Paleobiogeographic Aspects in the Lower Cretaceous of the Araripe Basin, NE of Brazil [PDF]

, 2019
Fossil mollusks in the Araripe Sedimentary Basin have been reported since the 1960s, with bivalves present in the Crato and Romualdo formations and gastropods restricted to the latter.
Priscilla Albuquerque Pereira, Rita de Cassia Tardin Cassab, Alcina Magnólia Franca Barreto   +2 more
core   +2 more sources

Preparation of fossil shrimps from the Romualdo Formation

Terrae Didatica
Fossil preparation is essential for exhibition, preservation, and paleontological analysis, ensuring structural integrity and revealing morphoanatomical and taphonomic data. This study details the preparation of a fossilized shrimp from the Romualdo Formation (MPSC CR3907p and MPSC CR3907cp), housed at the Plácido Cidade Nuvens Museum of Paleontology ...
Olga Alcântara Barros, Paulo Victor de Oliveira   +1 more
openaire   +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
Abstract 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. The methods used to process the samples were decanting, smear slide, centrifugation, and ultra-thin section confection ...
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
openaire   +3 more sources

Pinheiro (Crustacea, Decapoda, Brachyura) from the Romualdo Formation, Araripe Sedimentary Basin, Brazil

, 2023
Santana et al. (2022) described a new genus and species of fossil crab, Chronocancer camilosantanai, from carbonate concretions of the Romualdo Formation of the Araripe Sedimentary Basin. The journal in which the description appeared was published online
Allysson Pontes Pinheiro, Tavares, Marcos Domingos Siqueira, Carlos Antônio Muniz Martins, Melo, José Patrício Pereira, Martins, Carlos Antônio Muniz, José Patrício Pereira Melo, William Ricardo Amancio William Ricardo Amâncio Santana Santana, Santana, William Ricardo Amancio, Pinheiro, Allysson Pontes, Marcos Domingos Siqueira Tavares   +9 more
core   +1 more source

On the occurrence of pterosauria in Exu, Pernambuco (lower cretaceous Romualdo Formation, Araripe Basin), Northeastern Brazil

Estudos Geológicos, 2014
Este trabalho descreve um osso isolado de pterossauro da Formação Romualdo (Aptiano / Albiano) coletado em um novo sitío fossilífero na porção sudeste da Bacia do Araripe. O espécime (DGEO-CTG-UFPE 7516) consiste em uma ulna preservada em três dimensões que apresenta semelhanças morfológicas com os Pteranodontoidea e é tentativamente referido a ...
Tito Aureliano, Aline M. Ghilardi, Rudah R. C. Duque, Alcina M. F. Barreto   +3 more
openaire   +1 more source

Reinterpretation of Bakiribu waridza from the Romualdo Formation (Lower Cretaceous) of Brazil: a fish not a pterosaur

Anais da Academia Brasileira de Ciências
Abstract Fragmentary fossil remains from the Romualdo Formation (Lower Cretaceous) of Brazil, preserved in association with two fish were interpreted as two individuals of a new genus and species of ctenochasmatine pterosaur, Bakiribu waridza Pêgas et al. 2025.
David M. Unwin, Roy E. Smith, Samuel Cooper, David M. Martill   +3 more
openaire   +3 more sources