Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada.

  title={Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada.},
  author={Corentin C. Loron and Robert H Rainbird and Elizabeth C. Turner and J. Wilder Greenman and Emmanuelle J. Javaux},
  journal={Emerging topics in life sciences},
  volume={2 2},
Existing paleontological data indicate marked eukaryote diversification in the Neoproterozoic, ca. 800 Ma, driven by predation pressure and various other biotic and abiotic factors. Although the eukaryotic record remains less diverse before that time, molecular clock estimates and earliest crown-group affiliated microfossils suggest that the diversification may have originated during the Mesoproterozoic. Within new assemblages of organic-walled microfossils from the ca. 1150 to 900 Ma lower… 

Shale-hosted biota from the Dismal Lakes Group in Arctic Canada supports an early Mesoproterozoic diversification of eukaryotes

Abstract. The Mesoproterozoic is an important era for the development of eukaryotic organisms in oceans. The earliest unambiguous eukaryotic microfossils are reported in late Paleoproterozoic shales

Evidences of the Oldest Trophic Interactions in the Riphean Biota (Lakhanda Lagerstätte, Southeastern Siberia)

  • J. ShuvalovaK. NagovitsinP. Parkhaev
  • Environmental Science, Geography
    Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections
  • 2021
The hypothesis of explosive diversification of eukaryotes in the Late Proterozoic driven by selective predation cannot yet be confirmed paleontologically.

It's a protist-eat-protist world: recalcitrance, predation, and evolution in the Tonian-Cryogenian ocean.

The current understanding of predation in the Tonian and Cryogenian oceans as viewed through the fossil record is reviewed, and how the rise of eukaryotic predation upon other eUKaryotes (eukaryovory) may have played a role in major evolutionary transitions including the origins of biomineralization is discussed.

Preservation of early Tonian macroalgal fossils from the Dolores Creek Formation, Yukon

The rise of eukaryotic macroalgae in the late Mesoproterozoic to early Neoproterozoic was a critical development in Earth’s history that triggered dramatic changes in biogeochemical cycles and

Non-pollen palynomorphs in deep time: unravelling the evolution of early eukaryotes

Abstract Most of the Precambrian (>538 Ma) fossil record, which includes the time before the onset of macroscopic multicellular life, consists of minute organically preserved remains of soft-bodied

On the co‐evolution of surface oxygen levels and animals

Views from across this interpretive spectrum are presented—in a point–counterpoint format—regarding crucial aspects of the potential links between animals and surface oxygen levels to disentangle the relationships between oxygen availability and emergence and diversification of animal life.

The origin of phagocytosis in Earth history

Multiple late origins of phagocytosis could help explain why many of the ecological and evolutionary innovations of the Neoproterozoic Era happened when they did.

Early Earth and the rise of complex life.

Expert authors bring a mix of methods and opinions to their leading-edge reviews of the earliest proliferation and ecological impacts of eukaryotic life, the subsequent emergence and ecological divergence of animals, and the corresponding causes and consequences of environmental change.

The Tonian and Cryogenian Periods



Eukaryotic organisms in Proterozoic oceans

Focus on character evolution permits inferences about the innovations in cell biology and development that underpin the taxonomic and morphological diversification of eukaryotic organisms.

Origins and Early Evolution of Predation

Although predation was a decisive selective force in the Cambrian explosion, it was a shaper rather than a trigger of this evolutionary event, representing the transition from simple, mostly microbial, ecosystems to ones with complex food webs and second- and higher-order consumers.

Micropaleontology of the lower Mesoproterozoic Roper Group, Australia, and implications for early eukaryotic evolution

Roper fossils provide direct or inferential evidence for many basic features of eukaryotic biology, including a dynamic cytoskeleton and membrane system that enabled cells to change shape, life cycles that include resting cysts coated by decay-resistant biopolymers, reproduction by budding and binary division, osmotrophy, and simple multicellularity.

Tiny vampires in ancient seas: evidence for predation via perforation in fossils from the 780–740 million-year-old Chuar Group, Grand Canyon, USA

  • S. Porter
  • Geography
    Proceedings of the Royal Society B: Biological Sciences
  • 2016
These holes in seven species of organic-walled microfossils from the 780–740 million-year-old Chuar Group, Grand Canyon, Arizona, USA, are described, providing the oldest direct evidence for predation on eukaryotes.

Estimating the timing of early eukaryotic diversification with multigene molecular clocks

Taxon-rich multigene data combined with diverse fossils and a relaxed molecular clock framework are used to estimate the timing of the last common ancestor of extant eukaryotes and the divergence of major clades, suggesting that long stems preceded diversification in the major eUKaryotic lineages.

Plankton ecology and the Proterozoic-Phanerozoic transition

The major biogeochemical perturbations that mark the onset of the Phanerozoic might be a consequence, rather than a cause, of the Cambrian explosion; reduced C export due to zooplankton expansion explains the otherwise anomalous drop in 813C at the base of the Tom- motian.

Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis

This work presents new Re-Os isotopic ages from sedimentary rocks that stratigraphically bracket the occurrence of B. pubescens in the Bylot Supergroup of Baffin Island and revise its first appearance to 1.25 Ga, younger than commonly held interpretations and permits more precise estimates of early eukaryotic evolution.

Paleobiological perspectives on early eukaryotic evolution.

  • A. Knoll
  • Geography, Biology
    Cold Spring Harbor perspectives in biology
  • 2014
Protists continued to diversify along with animals in the more pervasively oxygenated oceans of the Phanerozoic Eon, and the Mid-Neoproterozoic establishment or expansion of eukaryophagy provides a possible mechanism for accelerating eUKaryotic diversification long after the origin of the domain.

Bangiomorpha pubescens n. gen., n. sp.: implications for the evolution of sex, multicellularity, and the Mesoproterozoic/Neoproterozoic radiation of eukaryotes

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.