Evidence map›Paper›PMID 26311035›Full record

ArticleScientific reports2015

Molecular composition and ultrastructure of Jurassic paravian feathers.

Johan Lindgren, Peter Sjövall, Ryan M Carney, Aude Cincotta, Per Uvdal, Steven W Hutcheson, Ola Gustafsson, Ulysse Lefèvre, François Escuillié, Jimmy Heimdal and 6 more

Abstract read
In one paragraph

Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing 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

25 citing papers in PubMed.

  1. Article
  2. 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
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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

16 authors.

Johan LindgrenDepartment of Geology, Lund University, 223 62 Lund, Sweden.
Peter SjövallSP Technical Research Institute of Sweden, Chemistry, Materials and Surfaces, 501 15 Borås, Sweden.
Ryan M CarneyDepartment of Ecology and Evolutionary Biology, Brown University, Providence, Rhode Island 02906, USA.
Aude CincottaOperational Direction 'Earth and History of Life', Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium.
Per UvdalMAX-IV laboratory, Lund University, 221 00 Lund, Sweden.
Steven W HutchesonDepartment of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland 20742, USA.
Ola GustafssonDepartment of Biology, Lund University, 223 62 Lund, Sweden.
Ulysse LefèvreOperational Direction 'Earth and History of Life', Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium.
François EscuilliéEldonia, 9 Avenue des Portes Occitanes, 3800 Gannat, France.
Jimmy HeimdalMAX-IV laboratory, Lund University, 221 00 Lund, Sweden.
Anders EngdahlMAX-IV laboratory, Lund University, 221 00 Lund, Sweden.
Johan A GrenDepartment of Geology, Lund University, 223 62 Lund, Sweden.
Benjamin P KearMuseum of Evolution, Uppsala University, 752 36 Uppsala, Sweden.
Kazumasa WakamatsuDepartment of Chemistry, Fujita Health University School of Health Sciences, Toyoake, Aichi 470-1192, Japan.
Johan YansDepartment of Geology, University of Namur, 5000 Namur, Belgium.
Pascal GodefroitOperational Direction 'Earth and History of Life', Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Feathers are amongst the most complex epidermal structures known, and they have a well-documented evolutionary trajectory across non-avian dinosaurs and basal birds. Moreover, melanosome-like microbodies preserved in association with fossil plumage have been used to reconstruct original colour, behaviour and physiology. However, these putative ancient melanosomes might alternatively represent microorganismal residues, a conflicting interpretation compounded by a lack of unambiguous chemical data. We therefore used sensitive molecular imaging, supported by multiple independent analytical tests, to demonstrate that the filamentous epidermal appendages in a new specimen of the Jurassic paravian Anchiornis comprise remnant eumelanosomes and fibril-like microstructures, preserved as endogenous eumelanin and authigenic calcium phosphate. These results provide novel insights into the early evolution of feathers at the sub-cellular level, and unequivocally determine that melanosomes can be preserved in fossil feathers.

Indexed as

AnimalsBirdsDinosaursDurapatiteEpidermisFeathersFossilsMelaninsMicrobodiesMicroscopy, ElectronSpectrometry, Mass, Secondary IonSpectrometry, X-Ray EmissionSpectrophotometry, InfraredTime FactorsDurapatiteeumelaninMelanins

Identifiers

PMID26311035
PMCPMC4550916

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Registered trials

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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.