Evidence map›Paper›PMID 29255053›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2018

SIMS analyses of the oldest known assemblage of microfossils document their taxon-correlated carbon isotope compositions.

J William Schopf, Kouki Kitajima, Michael J Spicuzza, Anatoliy B Kudryavtsev, John W Valley

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

51 citing papers in PubMed.

  1. Aspects of plant intelligence (ii).Plant signaling & behavior · 2026
    Review
  2. Three New Calcium Formate Reference Materials for δRapid communications in mass spectrometry : RCM · 2026
    Article
  3. Review
  4. Article
  5. Review
  6. Organic geochemical evidence for life in Archean rocks identified by pyrolysis-GC-MS and supervised machine learning.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  7. Article
  8. The emergence of metabolisms through Earth history and implications for biospheric evolution.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  9. Modelling exo-biospheres for biosignature predictions.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  10. Evolution of plant metabolism: the state-of-the-art.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024
    Review
  11. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

J William SchopfDepartment of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095; schopf@epss.ucla.edu.ORCID 0000-0003-3869-5664
Kouki KitajimaWisconsin Astrobiology Research Consortium, Department of Geoscience, University of Wisconsin, Madison, WI 53706.
Michael J SpicuzzaWisconsin Astrobiology Research Consortium, Department of Geoscience, University of Wisconsin, Madison, WI 53706.
Anatoliy B KudryavtsevCenter for the Study of Evolution and the Origin of Life, University of California, Los Angeles, CA 90095.
John W ValleyWisconsin Astrobiology Research Consortium, Department of Geoscience, University of Wisconsin, Madison, WI 53706.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Analyses by secondary ion mass spectroscopy (SIMS) of 11 specimens of five taxa of prokaryotic filamentous kerogenous cellular microfossils permineralized in a petrographic thin section of the ∼3,465 Ma Apex chert of northwestern Western Australia, prepared from the same rock sample from which this earliest known assemblage of cellular fossils was described more than two decades ago, show their δ

Indexed as

FossilsRadiometric DatingArchaeaAustraliaCarbon IsotopesCarbon IsotopesApex chertArchaeaArcheanmethanogensmethanotrophs

Identifiers

PMID29255053
PMCPMC5776830

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.