caa a22 4500 467897301 CHVBK 20180406152807.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s11038-006-9091-9 doi (NATIONALLICENCE)springer-10.1007/s11038-006-9091-9 7. Ancient Fossil Record and Early Evolution (ca.3.8 to 0.5Ga) [Elektronische Daten] [Purificacón López-Garcia, David Moreira, Emmanuel Douzery, Patrick Forterre, Mark Van Zuilen, Philippe Claeys, Daniel Prieur] Once life appeared, it evolved and diversified. From primitive living entities, an evolutionary path of unknown duration, likely paralleled by the extinction of unsuccessful attempts, led to a last common ancestor that was endowed with the basic properties of all cells. From it, cellular organisms derived in a relative order, chronology and manner that are not yet completely settled. Early life evolution was accompanied by metabolic diversification, i.e. by the development of carbon and energy metabolic pathways that differed from the first, not yet clearly identified, metabolic strategies used. When did the different evolutionary transitions take place? The answer is difficult, since hot controversies have been raised in recent years concerning the reliability of the oldest life traces, regardless of their morphological, isotopic or organic nature, and there are also many competing hypotheses for the evolution of the eukaryotic cell. As a result, there is a need to delimit hypotheses from solid facts and to apply a critical analysis of contrasting data. Hopefully, methodological improvement and the increase of data, including fossil signatures and genomic information, will help reconstructing a better picture of life evolution in early times as well as to, perhaps, date some of the major evolutionary transitions. There are already some certitudes. Modern eukaryotes evolved after bacteria, since their mitochondria derived from ancient bacterial endosymbionts. Once prokaryotes and unicellular eukaryotes had colonized terrestrial ecosystems for millions of years, the first pluricellular animals appeared and radiated, thus inaugurating the Cambrian. The following sections constitute a collection of independent articles providing a general overview of these aspects. Springer Science+Business Media, Inc., 2006 Biomarkers nationallicence Cambrian explosion nationallicence early evolution nationallicence microfossil nationallicence origin of eukaryotes nationallicence López-Garcia Purificacón Unité d'Ecologie, Systématique et Evolution, Université Paris-Sud, Orsay, France aut Moreira David Unité d'Ecologie, Systématique et Evolution, Université Paris-Sud, Orsay, France aut Douzery Emmanuel Institut des Sciences de l'Evolution, Université Montpellier II, Montpellier, France aut Forterre Patrick Institut de Génétique et Microbiologie, Université Paris-Sud, Orsay, France aut Van Zuilen Mark Equipe Géobiosphère Actuelle et Primitive, Institut de Physique du Globe, Paris, France aut Claeys Philippe Department of Geology, Vrije Universiteit, Brussels, Belgium aut Prieur Daniel Université Bretagne Occidentale, Brest, France aut Earth, Moon, and Planets Kluwer Academic Publishers 98/1-4(2006-06-01), 247-290 0167-9295 98:1-4<247 2006 98 11038 https://doi.org/10.1007/s11038-006-9091-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11038-006-9091-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- López-Garcia Purificacón Unité d'Ecologie, Systématique et Evolution, Université Paris-Sud, Orsay, France aut NATIONALLICENCE 700 1- Moreira David Unité d'Ecologie, Systématique et Evolution, Université Paris-Sud, Orsay, France aut NATIONALLICENCE 700 1- Douzery Emmanuel Institut des Sciences de l'Evolution, Université Montpellier II, Montpellier, France aut NATIONALLICENCE 700 1- Forterre Patrick Institut de Génétique et Microbiologie, Université Paris-Sud, Orsay, France aut NATIONALLICENCE 700 1- Van Zuilen Mark Equipe Géobiosphère Actuelle et Primitive, Institut de Physique du Globe, Paris, France aut NATIONALLICENCE 700 1- Claeys Philippe Department of Geology, Vrije Universiteit, Brussels, Belgium aut NATIONALLICENCE 700 1- Prieur Daniel Université Bretagne Occidentale, Brest, France aut NATIONALLICENCE 773 0- Earth, Moon, and Planets Kluwer Academic Publishers 98/1-4(2006-06-01), 247-290 0167-9295 98:1-4<247 2006 98 11038 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer