Precambrian

Just out | An Akouemma hemisphaeria Organic Macrofossils Colony Hosting Biodiversity Assemblage on the Seafloor of Okondja Basin (Gabon) dated at 2.2 Ga @ Journal of Geology & Geophysics

Just out @ Journal of Geology & Geophysics An Akouemma hemisphaeria Organic Macrofossils Colony Hosting Biodiversity Assemblage on the Seafloor of Okondja Basin (Gabon) dated at 2.2 Ga Author(s) Edou-Minko A, Moussavou M, Sato T, Tchikoundzi C, Sawaki Y, Ndong Ondo S, Ortega R, Maire R, Kaestner A, Mbina Mounguengui M, Roudeau S, Fleury G, Carmona A, de Parseval PH, Mvoubou M, Moussavou BM, Agondjo MO, Sasaki O and Maruyama S

On the News | Gabon | Paléontologie: Akouemma, un fossile daté de 2,2 milliards d’années @ Gabon Review

On the News @ Gabon Review Title:  Paléontologie: Akouemma, un fossile daté de 2,2 milliards d’années Loic Ntoutoume Excerpt: “Amboise Edou Minko et Mathieu Moussavou, deux chercheurs de l’Unité de recherche en sciences de la terre et de l’environnement de l’USTM, viennent de mettre en évidence la découverte de macrofossiles d’organismes désignés «Akouemmahemisphaeria», datés de 2,2 milliards d’années, dans le bassin francevillien au Gabon. Pour ces chercheurs qui ont bénéficié de

Just out | Inference of facultative mobility in the enigmatic Ediacaran organism Parvancorina @ Biology Letters

Just out @ Biology Letters Inference of facultative mobility in the enigmatic Ediacaran organism Parvancorina Author(s) Simon A. F. Darroch, Imran A. Rahman, Brandt Gibson, Rachel A. Racicot, Marc Laflamme Abstract: Establishing how Ediacaran organisms moved and fed is critical to deciphering their ecological and evolutionary significance, but has long been confounded by their non-analogue body plans. Here, we use computational fluid dynamics to quantitatively analyse water flow around the Ediacaran

Just out | Highly regulated growth and development of the Ediacara macrofossil Dickinsonia costata @ PLOS one

Just out @ PLOS one Highly regulated growth and development of the Ediacara macrofossil Dickinsonia costata Author(s) Scott D. Evans, Mary L. Droser, James G. Gehling Abstract: The Ediacara Biota represents the oldest fossil evidence for the appearance of animals but linking these taxa to specific clades has proved challenging. Dickinsonia is an abundant, apparently bilaterally symmetrical Ediacara fossil with uncertain affinities. We identified and measured key morphological features of over

On the News | UCR study sheds light on Earth's first animals @ EurekAlert!

On the News @ EurekAlert! Title:  UCR study sheds light on Earth’s first animals Excerpt: “More than 550 million years ago, the oceans were teeming with flat, soft-bodied creatures that fed on microbes and algae and could grow as big as bathmats. Today, researchers at the University of California, Riverside are studying their fossils to unlock the secrets of early life. In their latest study, published today in the journal PLOS

Just out | The timetable of evolution @ Science Advances

Just out @ Science Advances The timetable of evolution Author(s) Andrew H. Knoll, and Martin A. Nowak Abstract: The integration of fossils, phylogeny, and geochronology has resulted in an increasingly well-resolved timetable of evolution. Life appears to have taken root before the earliest known minimally metamorphosed sedimentary rocks were deposited, but for a billion years or more, evolution played out beneath an essentially anoxic atmosphere. Oxygen concentrations in the atmosphere and

Just out | Carbonaceous and siliceous Neoproterozoic vase-shaped microfossils (Urucum Formation, Brazil) and the question of early protistan biomineralization @ Journal of Paleontology

Just out @ Journal of Paleontology Carbonaceous and siliceous Neoproterozoic vase-shaped microfossils (Urucum Formation, Brazil) and the question of early protistan biomineralization Author(s) Luana Morais, Thomas Rich Fairchild, Daniel J.G. Lahr, Isaac D. Rudnitzki, J. William Schopf, Amanda K. Garcia, Anatoliy B. Kudryavtsev, Guilherme R. Romero Abstract: Vase-shaped microfossils (VSMs) occur in dolomitic extraclasts of indeterminate provenance within the basal diamictite of the Neoproterozoic Urucum Formation (Jacadigo Group) of west-central Brazil,

Just out | Silicified microbiota from the Paleoproterozoic Dahongyu Formation, Tianjin, China @ Journal of Paleontology

Just out @ Journal of Paleontology Silicified microbiota from the Paleoproterozoic Dahongyu Formation, Tianjin, China Author(s) Min Shi, Qing-Lai Feng, Maliha Zareen Khan, Stanley Awramik, Shi-Xing Zhu Abstract: Cherts and silicified dolostones of the ca. 1600 Ma Dahongyu Formation (uppermost Changcheng Group) from North China contain well-preserved microfossils. Cyanobacteria filaments and coccoids dominate the studied Dahongyu microbiota in the Jixian section. These microfossils show the characteristics of endobenthic, epibenthic, and allochthonous

Just out | Relating Ediacaran Fronds @ Paleobiology

Just out @ Paleobiology Relating Ediacaran Fronds Author(s) T. Alexander Dececchi, Guy M. Narbonne, Carolyn Greentree and Marc Laflamme Abstract: Ediacaran fronds are key components of terminal-Proterozoic ecosystems. They represent one of the most widespread and common body forms ranging across all major Ediacaran fossil localities and time slices postdating the Gaskiers glaciation, but uncertainty over their phylogenetic affinities has led to uncertainty over issues of homology and functional morphology between and

Just out | The rise and fall of stromatolites in shallow marine environments @ Geology

Just out @ Geology The rise and fall of stromatolites in shallow marine environments Author(s) Shanan E. Peters, Jon M. Husson, Julia Wilcots Abstract: Stromatolites are abundant in shallow marine sediments deposited before the evolution of animals, but in the modern ocean they are restricted to locations where the activity of animals is limited. Overall decline in the abundance of stromatolites has, therefore, been attributed to the evolution of substrate-modifying