Results 31 to 40 of about 340 (144)

Caracterização tafonômica e estratigráfica de Cloudina lucianoi (Beurlen & Sommer, 1957) Zaine & Faircild, 1985, no Grupo Corumbá, ediacarano do sudeste do Brasil [PDF]

, 2015
Estudos do fóssil-índice Cloudina Germs 1972, do Neo-ediacarano, representado no Brasil por Cloudina lucianoi (Beurlen & Sommer) Zaine & Fairchild 1985, foram realizados nos calcários da Formação Tamengo, Grupo Corumbá, SW Brasil, nas pedreiras de ...
Felipe van Enck Meira, Meira, Felipe van Enck   +1 more
openaire   +2 more sources

Cuando la vida anduvo errática: Un factor ambiental para la biomineralización de metazoos

Estudios Geologicos, 2019
La repentina aparición de metazoos biomineralizados en las facies calcáreas del Miembro de Pockenbank (Namibia) parece reflejar un rápido cambio en el estado redox, la concentración de calcio y la alcalinidad del océano.
A. J. Kaufman, L. Kriesfeld, P. Vickers-Rich, G. Narbonne   +3 more
doaj   +1 more source

The ‘biomineralization toolkit’ and the origin of animal skeletons

Biological Reviews, Volume 95, Issue 5, Page 1372-1392, October 2020., 2020
ABSTRACT Biomineralized skeletons are widespread in animals, and their origins can be traced to the latest Ediacaran or early Cambrian fossil record, in virtually all animal groups. The origin of animal skeletons is inextricably linked with the diversification of animal body plans and the dramatic changes in ecology and geosphere–biosphere interactions
Duncan J. E. Murdock
wiley   +1 more source

Affinity of Ediacaran skeletal fauna and their environmental context [PDF]

, 2022
The Ediacaran-Cambrian boundary (~541 million years ago (Ma)) signifies the start of the ‘Cambrian Explosion’ of animals, and by 520 Ma most major phyla had emerged.
Shore, Amy J.
core   +1 more source

Avances recientes en la comprensión del sistema de vida terrestre del Ediacárico tardío en China meridional y el Ártico siberiano

Estudios Geologicos, 2019
El Ediacárico terminal inlcuye una serie de cambios drásticos en los ciclos biogeoquímicos, muchos de los cuales se asocian con modificaciones evolutivas en los registros fósiles correspondientes.
H. Cui, A. J. Kaufman, S. Xiao, D. V. Grazhdankin, S. Peek, A. J. Martin, N. V. Bykova, V. I. Rogov, X. M. Liu, F. Zhang, S. J. Romaniello, A. D. Anbar, Y. Peng, Y. Cai, J. D. Schiffbauer, M. Meyer, G. J. Gilleaudeau, R. E. Plummer, N. E. Sievers, S. Goderis, P. Claeys   +20 more
doaj   +1 more source

Chemo- and biostratigraphy of the Gaojiashan section (northern Yangtze platform, South China): a new Pc-C boundary section [PDF]

Fossil Record, 2015
The widespread, terminal Ediacaran Dengying Formation (~ 551–~ 542 Ma) of South China hosts one of the most prominent negative carbonate carbon isotope excursions in Earth's history and thus bears on the correlation of the Precambrian–Cambrian boundary ...
A. Gamper, U. Struck, F. Ohnemueller, C. Heubeck, S. Hohl   +4 more
doaj   +1 more source

Constraining the onset and environmental setting of metazoan biomineralization: the Ediacaran Nama Group of the Tsaus Mountains, Namibia [PDF]

, 2023
The advent of animal (metazoan) biomineralization marks a fundamental transition in Earth's history, facilitating the diversification of novel body plans as well as the biological control of carbonate sediment production, resulting in a permanent ...
Andrew Curtis, Mariana Yilales, Kaputuaza, Kavevaza, Alexander, Ruaridh; id_orcid, Junias Ndeunyema, Ruaridh D. Alexander, Collen-Issia Uahengo, Yilales Agelvis, Mariana; id_orcid, Rachel A. Wood, Bowyer, Fred, Fred T. Bowyer, Curtis, Andrew; id_orcid, Ndeunyema, Junias, Wood, Rachel, Uahengo, Collen-Issia, Kavevaza Kaputuaza   +15 more
core   +1 more source

Borings in Cloudina Shells: Complex Predator-Prey Dynamics in the Terminal Neoproterozoic

PALAIOS, 2003
Abstract Predation as an important driver of evolutionary change long has been assumed, despite difficulties to substantiate it with specific examples of predatory interaction, especially for the early Paleozoic diversification of animal life. This study corroborates the existence of shell-drilling predation in the uppermost Neoproterozoic of China ...
H. HUA, B. R. PRATT, L.-Y. ZHANG
openaire   +3 more sources

Cloudina-Corumbella-Namacalathus association from the Itapucumi Group, Paraguay: Increasing ecosystem complexity and tiering at the end of the Ediacaran [PDF]

, 2022
The intriguing Ediacaran fossil Namacalathus is described from limestones of the Tagatiya Guazú Formation, Itapucumi Group, Paraguay. This is the fifth occurrence of the genus in the Ediacaran geological record.
Guimarães Simões, Marcello, Gaucher, Claudio, Boggiani, Paulo C., Poiré, Daniel Gustavo, Tavares Freitas, Bernardo, Riccomini, Claudio, Nobrega Sial, Alcides, Veríssimo Warren, Lucas, Quaglio, Fernanda   +8 more
core  

Análisis paleontológicos a través límite Ediacárico-Cámbrico, Grupo Alto Corumbá, Brasil

Estudios Geologicos, 2019
Se presenta en este trabajo el análisis paleontológico de 26 especies fósiles muestradas en cinco cortes de las Formaciones de Tamengo y Guaicurus en las regines de Corumbá y Ladário: canteras de Corcal y Laginha, Porto Sobramil, Porto Figueiras y ...
R.R. Adôrno, D.H.G. Walde, D.A. Do Carmo, M. Denezine, I. Cortijo, E.A.M. Sanchez, T.C. Tobias, G. Fazio, L.V. Warren, B.D. Erdtmann, Y. Cai, M. Giorgioni, M.E.A.F. Ramos, M.C. Baptista, E.M. Guimarães, M. F. Figueiredo, G.J. Germs   +16 more
doaj   +1 more source