Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

Possible early foraminiferans in post-Sturtian (716−635 Ma) cap carbonates

2011; Geological Society of America; Volume: 40; Issue: 1 Linguagem: Inglês

10.1130/g32535.1

1943-2682

Tanja Bosak, Daniel J. G. Lahr, Sara B. Pruss, Francis A. Macdonald, Andrew J. Gooday, Lilly Alaine Dalton, E. D. Matys,

Coral and Marine Ecosystems Studies

Research Article| January 01, 2012 Possible early foraminiferans in post-Sturtian (716−635 Ma) cap carbonates Tanja Bosak; Tanja Bosak 1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Search for other works by this author on: GSW Google Scholar Daniel J.G. Lahr; Daniel J.G. Lahr 2Department of Zoology, University of São Paulo, 05508-090 São Paulo, Brazil Search for other works by this author on: GSW Google Scholar Sara B. Pruss; Sara B. Pruss 3Department of Geosciences, Smith College, Northampton, Massachusetts 01063, USA Search for other works by this author on: GSW Google Scholar Francis A. Macdonald; Francis A. Macdonald 4Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA Search for other works by this author on: GSW Google Scholar Andrew J. Gooday; Andrew J. Gooday 5National Oceanography Centre, Southampton, UK Search for other works by this author on: GSW Google Scholar Lilly Dalton; Lilly Dalton 3Department of Geosciences, Smith College, Northampton, Massachusetts 01063, USA Search for other works by this author on: GSW Google Scholar Emily D. Matys Emily D. Matys 1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Tanja Bosak 1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Daniel J.G. Lahr 2Department of Zoology, University of São Paulo, 05508-090 São Paulo, Brazil Sara B. Pruss 3Department of Geosciences, Smith College, Northampton, Massachusetts 01063, USA Francis A. Macdonald 4Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA Andrew J. Gooday 5National Oceanography Centre, Southampton, UK Lilly Dalton 3Department of Geosciences, Smith College, Northampton, Massachusetts 01063, USA Emily D. Matys 1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Publisher: Geological Society of America Received: 07 Jun 2011 Revision Received: 22 Aug 2011 Accepted: 25 Aug 2011 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (1): 67–70. https://doi.org/10.1130/G32535.1 Article history Received: 07 Jun 2011 Revision Received: 22 Aug 2011 Accepted: 25 Aug 2011 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Tanja Bosak, Daniel J.G. Lahr, Sara B. Pruss, Francis A. Macdonald, Andrew J. Gooday, Lilly Dalton, Emily D. Matys; Possible early foraminiferans in post-Sturtian (716−635 Ma) cap carbonates. Geology 2012;; 40 (1): 67–70. doi: https://doi.org/10.1130/G32535.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Foraminifera are an ecologically important group of modern heterotrophic amoeboid eukaryotes whose naked and testate ancestors are thought to have evolved ∼1 Ga ago. However, the single-chambered agglutinated tests of these protists appear in the fossil record only after ca. 580 Ma, coinciding with the appearance of macroscopic and mineralized animals. Here we report the discovery of small, slender tubular microfossils in the Sturtian (ca. 716–635 Ma) cap carbonate of the Rasthof Formation in Namibia. The tubes are 200–1300 μm long and 20–70 μm wide, and preserve apertures and variably wide lumens, folds, constrictions, and ridges. Their sometimes flexible walls are composed of carbonaceous material and detrital minerals. This combination of morphologic and compositional characters is also present in some species of modern single-chambered agglutinated tubular foraminiferans, and is not found in other agglutinated eukaryotes. The preservation of possible early Foraminifera in the carbonate rocks deposited in the immediate aftermath of Sturtian low-latitude glaciation indicates that various morphologically modern protists thrived in microbially dominated ecosystems, and contributed to the cycling of carbon in Neoproterozoic oceans much before the rise of complex animals. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.