Proterozoic

Just out | Vase-shaped microfossils from the Tonian Callison Lake Formation of Yukon, Canada: taxonomy, taphonomy and stratigraphic palaeobiology @ Palaeontology

Just out @ Palaeontology Vase-shaped microfossils from the Tonian Callison Lake Formation of Yukon, Canada: taxonomy, taphonomy and stratigraphic palaeobiology Author(s) Phoebe A. Cohen, Spencer W. Irvine, Justin V. Strauss Abstract: Vase-shaped microfossils (VSMs), interpreted as the remains of testate amoebae, are found in late Tonian sedimentary rocks around the world. Here we explore the taxonomy, taphonomy and stratigraphical occurrence of VSMs from the Callison Lake Formation of the Coal Creek

Just out | A Laurentian record of the earliest fossil eukaryotes @ Geology

Just out @ Geology A Laurentian record of the earliest fossil eukaryotes Author(s) Zachary R. Adam, Mark L. Skidmore, David W. Mogk and Nicholas J. Butterfield Abstract: The oldest evidence of eukaryotes in the fossil record comes from a recurrent assemblage of morphologically differentiated late Paleoproterozoic to early Mesoproterozoic microfossils. Although widely distributed, the principal constituents of this Tappania–Dictyosphaera–Valeria assemblage have not hitherto been recognized on Laurentia. We have recovered all three taxa from

Just out | Taxonomic composition and biostratigraphic value of the Early Riphean organic-walled microfossil association from the Ust’-Il’ya Formation of the Anabar Uplift, Northern Siberia @ Stratigraphy and Geological Correlation

Just out @ Stratigraphy and Geological Correlation Taxonomic composition and biostratigraphic value of the Early Riphean organic-walled microfossil association from the Ust’-Il’ya Formation of the Anabar Uplift, Northern Siberia Author(s) V. N. Sergeev, N. G. Vorob’eva, P. Yu. Petrov, M. A. Semikhatov Abstract: It is demonstrated on the basis of the first monographic study of multiple and taxonomically variable organic-walled microfossils from the Ust’-Il’ya Formation of the Anabar Uplift that both prokaryotic and eukaryotic forms are present in the

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,