Bangiomorpha pubescens n. gen., n. sp.: implications for the evolution of sex, multicellularity, and the Mesoproterozoic/Neoproterozoic radiation of eukaryotes
- N. Butterfield
- BiologyPaleobiology
- 1 June 2000
Bangiomorpha pubescens is the first occurrence of complex multicellularity in the fossil record, and may account for the onset of a major protistan radiation near the Mesoproterozoic/NeoproTerozoic boundary.
Paleobiology of the Neoproterozoic Svanbergfjellet Formation, Spitsbergen
- N. Butterfield, A. Knoll, K. Swett
- Environmental Science, Geography
- 11 December 2006
A review of Proterozoic multicellular organisms reveals that a coenocytic grade of organization was common among early metaphytes and supports the view (that a cellularity is a derived condition in many ‘multicellular’ lineages).
Probable Proterozoic fungi
- N. Butterfield
- Environmental SciencePaleobiology
- 21 December 2005
Abstract A large, morphologically heterogeneous population of acanthomorphic acritarchs from the early Neoproterozoic Wynniatt Formation, Victoria Island, northwestern Canada, is ascribed to two…
Secular distribution of Burgess‐Shale‐type preservation
- N. Butterfield
- Geography, Environmental Science
- 1 March 1995
Burgess-Shale-type preservation is defined as a taphonomic pathway involving the exceptional organic preservation of non-mineralizing organisms in fully marine siliciclastic sediments. In the…
Oxygen, animals and oceanic ventilation: an alternative view
- N. Butterfield
- Environmental Science, GeographyGeobiology
- 1 January 2009
A critical look is taken at the oxygen-evolution connection and an alternative, biological explanation for geochemical signatures through the terminal Proterozoic is discussed.
A bangiophyte red alga from the Proterozoic of arctic Canada.
- N. Butterfield, A. Knoll, K. Swett
- Environmental Science, GeographyScience
- 5 October 1990
Morphological details, especially the presence of multiseriate filaments composed of radially arranged wedge- shaped cells derived by longitudinal divisions from disc-shaped cells in uniseriate Filaments, indicate that the fossils are related to extant species in the genus Bangia.
MACROEVOLUTION AND MACROECOLOGY THROUGH DEEP TIME
- N. Butterfield
- Environmental Science, Geography
- 1 January 2007
The fossil record documents two mutually exclusive macroevolutionary modes separated by the transitional Ediacaran Period, which reinvented the rules of macroecology through their invention of multitrophic food webs, large body size, life-history trade-offs, ecological succession, biogeography, major increases in standing biomass, eukaryote-dominated phytoplankton and the potential for mass extinction.
Leanchoilia guts and the interpretation of three-dimensional structures in Burgess Shale-type fossils
- N. Butterfield
- Environmental Science, GeographyPaleobiology
- 21 December 2002
Abstract The Burgess Shale arthropod Leanchoilia superlata Walcott 1912, commonly preserves a three-dimensional axial structure generally interpreted as gut contents. Thin-section examination shows…
A vaucheriacean alga from the middle Neoproterozoic of Spitsbergen: implications for the evolution of Proterozoic eukaryotes and the Cambrian explosion
- N. Butterfield
- Geography, Environmental SciencePaleobiology
- 1 March 2004
Abstract A morphologically diverse assemblage of organic-walled fossils from the middle Neoproterozoic Svanbergfjellet Formation, Spitsbergen, is identified as a monospecific assemblage representing…
Strontium isotopic variations of Neoproterozoic seawater: implications for crustal evolution.
- Y. Asmerom, S. Jacobsen, A. Knoll, N. Butterfield, K. Swett
- Geology, GeographyGeochimica et Cosmochimica Acta
- 1 October 1991
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