Evidence map›Paper›PMID 40750578›Full record

ArticleNature communications2025

Nanoscale cuticle mass density variations influenced by pigmentation in butterfly wing scales.

Deepan Balakrishnan, Anupama Prakash, Benedikt J Daurer, Cédric Finet, Ying Chen Lim, Zhou Shen, Pierre Thibault, Antónia Monteiro, N Duane Loh

Abstract read
In one paragraph

Article in Nature communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing 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

3 citing papers in PubMed.

  1. Article
  2. Moth-Wing-Inspired Multifunctional Metamaterials.Advanced materials (Deerfield Beach, Fla.) · 2026
    Article
  3. The BTB-ZF geneeLife · 2024
    Article
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

9 authors.

Deepan Balakrishnan *Department of Biological Sciences, National University of Singapore, Singapore, Singapore.ORCID http://orcid.org/0000-0001-8684-1158
Anupama Prakash *Department of Biological Sciences, National University of Singapore, Singapore, Singapore.
Benedikt J Daurer *Diamond Light Source, Harwell Science & Innovation Campus, Didcot, UK.ORCID http://orcid.org/0000-0002-1887-7551
Cédric FinetDepartment of Biological Sciences, National University of Singapore, Singapore, Singapore.
Ying Chen LimCentre for Bioimaging Sciences, National University of Singapore, Singapore, Singapore.ORCID http://orcid.org/0009-0003-5932-6902
Zhou ShenCentre for Bioimaging Sciences, National University of Singapore, Singapore, Singapore.ORCID http://orcid.org/0000-0002-1203-9143
Pierre ThibaultUniversità degli Studi di Trieste, Trieste, Italy.
Antónia MonteiroDepartment of Biological Sciences, National University of Singapore, Singapore, Singapore. antonia.monteiro@nus.edu.sg.ORCID http://orcid.org/0000-0001-9696-459X
N Duane LohDepartment of Biological Sciences, National University of Singapore, Singapore, Singapore. duaneloh@nus.edu.sg.ORCID http://orcid.org/0000-0002-8886-510X

Funding

National Research Foundation Singapore (National Research Foundation-Prime Minister's office, Republic of Singapore) NRFI05-2019-0006National University of Singapore (NUS) A-0004744-00-00
6 · The paper itself

Abstract

How pigment distribution influences the cuticle density within a microscopic butterfly wing scale, and how both impact each scale's final reflected color, remains unknown. We use ptychographic X-ray computed tomography to quantitatively determine, at nanoscale resolutions, the three-dimensional mass density of scales with pigmentation differences. By comparing cuticle densities between two pairs of scales with pigmentation differences, we determine that the density of the lower lamina is inversely correlated with pigmentation. In the upper lamina structure of Junonia orithya and Bicyclus anynana, low pigment levels also correlate with sheet-like chitin structures as opposed to rod-like structures. Within each scale, we determine that the lower lamina in all scales has the highest density, and distinct layers within the lower lamina help explain reflected color. We hypothesize that pigments, in addition to absorbing specific wavelengths, can affect cuticle polymerization, density, and refractive index, thereby impacting reflected wavelengths that produce colors.

Indexed as

Animal ScalesButterfliesPigmentationWings, AnimalAnimalsChitinTomography, X-Ray ComputedChitin

Identifiers

PMID40750578
PMCPMC12316923

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.