Results 21 to 30 of about 340 (144)

Life history and autecology of an Ediacaran index fossil: Development and dispersal of Cloudina [PDF]

Gondwana Research, 2015
Abstract Cloudina is the best-known biomineralizing metazoan and a potential index fossil in the late Ediacaran Period, yet many aspects of its biology remain poorly understood. Previous reports have shown that Cloudina tubes grow from a basally closed funnel (or apical element), with occasional dichotomous branching.
Yaoping Cai, Hong Hua, James D Schiffbauer   +2 more
exaly   +2 more sources

New insight into the global record of the Ediacaran tubular morphotype: a common solution to early multicellularity [PDF]

Royal Society Open Science
The tubular morphogroup is a common component of Earth’s first complex, multicellular communities—the Ediacaran biota—and offers valuable insight into biological traits that are fundamental to animal life because they have intriguing links to metazoan ...
Rachel L. Surprenant, Mary L. Droser
doaj   +2 more sources

Una biota transicional Ediacárica–Cámbrica en el anticlinal de Abenójar (Macizo Ibérico, España)

Estudios Geologicos, 2018
Se describe una secuencia conteniendo una biota transicional ediacárica–cámbrica, en el valle del arroyo de las Navezuelas, anticlinal de Abenójar (Grupo Ibor, Zona Centroibérica, España).
J. Simón
doaj   +3 more sources

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

Precambrian Research, 2017
Abstract The intriguing Ediacaran fossil Namacalathus is described from limestones of the Tagatiya Guazu Formation, Itapucumi Group, Paraguay. This is the fifth occurrence of the genus in the Ediacaran geological record. The Paraguayan Namacalathus specimens are preserved as partially complete spheroidal cups with an opening at the top and thin ...
Warren, Lucas Verissimo, Quaglio, Fernanda, Simoes, Marcello Guimaraes, Gaucher, Claudio, Riccomini, Claudio, Poire, Daniel G., Freitas, Bernardo Tavares, Boggiani, Paulo C., Sial, Alcides Nobrega   +8 more
openaire   +7 more sources

Guía de campo pre-congreso, 17-18 de Octubre de 2019: Ediacárico, Paleozoico Inferior y panorámicas en el Geoparque de la UNESCO Villuercas-Ibores-Jara

Estudios Geologicos, 2019
Se describen y figuran aquí varias unidades estratigráficas características del tránsito Ediacárico-Cámbrico entre Guadalupe y Castañar de Ibor, al norte del Geoparque de Villuercas-Ibores-Jara (Cáceres).
S. Jensen, J. J. Álvaro, T. Palacios
doaj   +3 more sources

Guía de campo post-congreso, 21-24 de Octubre de 2019: Ediacárico y Terreneuviense en los alrededores del Geoparque de la UNESCO Villuercas-Ibores-Jara

Estudios Geologicos, 2019
Una de las esquinas de los mapas geográficos que enlazan las provincias de Badajoz, Cáceres y Toledo contiene unos afloramientos claves para entender el tránsito Ediacárico-Cámbrico de la Zona Centroibérica. En los núcleos del Anticlinorio Extremeño y de
J. J. Álvaro, S. Jensen, T. Palacios
doaj   +3 more sources

New and revised small shelly fossil record from the lower Cambrian of northern Iran

Papers in Palaeontology, Volume 7, Issue 4, Page 2141-2181, November 2021., 2021
Abstract Small shelly fossils (SSFs) are highly informative of the ‘Cambrian explosion’. Their palaeobiodiversity has been documented from lower Cambrian deposits worldwide but it remains elusive in areas such as Iran, despite this region occupying a critical position on the north‐western Gondwana margin during the early Cambrian. This new study of the
Léa Devaere, Dieter Korn, Abbas Ghaderi, Ulrich Struck, Alireza K. Bavandpur, Javier Álvaro   +5 more
wiley   +1 more source

Ediacaran metazoan fossil record from South America and its implications in the studies about origin and complexification of animal life [PDF]

Geologia USP. Série Científica, 2013
The Ediacaran Period marks the first appearance of complex macroscopic organisms in the fossil record. Current evidence indicates that Ediacara biota is composed of animals, groups of extinct giant protists, algae and other organisms without proven ...
Bruno Becker Kerber, Ana Lucia Zucatti da Rosa, Sandra Garcia Gabas, Juliana de Moraes Leme, Mírian Liza Alves Forancelli Pacheco   +4 more
doaj   +1 more source

New Facies Model and Carbon Isotope Stratigraphy for an Ediacaran Carbonate Platform From South America (Tamengo Formation—Corumbá Group, SW Brazil)

Frontiers in Earth Science, 2022
The Ediacaran is a period characterized by the diversification of early animals and extensive neritic carbonate deposits. These deposits are still not well understood in terms of facies and carbon isotope composition (δ13C). In this study we focus on the
Maria E. A. F. Ramos, Martino Giorgioni, Detlef H. G. Walde, Dermeval A. do Carmo, Gabriella Fazio, Lucieth C. Vieira, Matheus Denezine, Roberto V. Santos, Rodrigo R. Adôrno, Rodrigo R. Adôrno, Lucas Lage Guida   +10 more
doaj   +1 more source

Paleobiologia de Cloudina sp. (Ediacarano, Grupo Corumbá): implicações tafonômicas, taxonômicas e paleoecológicas [PDF]

, 2016
Cloudina foi o primeiro fóssil de um organismo biomineralizado encontrado no final do Ediacarano. Também figuram nesse período Corumbella, Namacalathus, Sinotubulites e Namapoikia entre a biota esquelética.
Kerber, Bruno Becker
openaire   +2 more sources