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Title: Evolution of Insect Iridescence: Origins of Three-Dimensional Photonic Crystals in Weevils (Coleoptera: Curculionoidea)

Abstract

Abstract A variety of photonic mechanisms give rise to iridescence and other structural colors in insects. In weevils (Coleoptera: Curculionoidea), iridescence is created by the most complex of these mechanisms, the three-dimensional photonic crystal. These self-assembling crystals take the form of triply periodic networks with single diamond or single gyroid symmetries and have been the subject of many descriptive studies based on individual species (often on a single specimen). To determine how these extraordinary nanostructures have evolved, we conduct the first comparative study of photonic crystals and setal nanostructure across Curculionoidea. By integrating structural data with newly available phylogenetic information, we demonstrate that—despite their widespread geographical and taxonomic distribution—three-dimensional photonic crystals appear to have evolved only once in weevils, in the common ancestor of a clade comprising the current subfamilies Entiminae and Cyclominae. Flattened, hollow setae with an unordered, spongy network in the lumen appear to be a necessary precursor to three-dimensional photonic crystals; we propose an evolutionary pathway by which this transformation has occurred.

Authors:
ORCiD logo [1];  [2];  [3]
  1. NSW Department of Primary Industries, Biosecurity Collections, 1447 Forest Rd, Orange, NSW, Australia
  2. CSIRO Ecosystem Sciences, Canberra 2601, GPO Box 1700, Australia
  3. Division of Science, Yale-NUS College, 10 College Avenue West, Singapore, NUS Nanotechnology and Nanoscience Initiative (NUSNNI-NanoCore), National University of Singapore, Singapore, Department of Biological Science, National University of Singapore, Singapore, Lee Kong Chian Natural History Museum, National University of Singapore, Singapore
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1579398
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Published Article
Journal Name:
Integrative and Comparative Biology
Additional Journal Information:
Journal Name: Integrative and Comparative Biology Journal Volume: 59 Journal Issue: 6; Journal ID: ISSN 1540-7063
Publisher:
Oxford University Press
Country of Publication:
United States
Language:
English

Citation Formats

Seago, Ainsley E., Oberprieler, Rolf, and Saranathan, Vinod Kumar. Evolution of Insect Iridescence: Origins of Three-Dimensional Photonic Crystals in Weevils (Coleoptera: Curculionoidea). United States: N. p., 2019. Web. doi:10.1093/icb/icz040.
Seago, Ainsley E., Oberprieler, Rolf, & Saranathan, Vinod Kumar. Evolution of Insect Iridescence: Origins of Three-Dimensional Photonic Crystals in Weevils (Coleoptera: Curculionoidea). United States. doi:10.1093/icb/icz040.
Seago, Ainsley E., Oberprieler, Rolf, and Saranathan, Vinod Kumar. Wed . "Evolution of Insect Iridescence: Origins of Three-Dimensional Photonic Crystals in Weevils (Coleoptera: Curculionoidea)". United States. doi:10.1093/icb/icz040.
@article{osti_1579398,
title = {Evolution of Insect Iridescence: Origins of Three-Dimensional Photonic Crystals in Weevils (Coleoptera: Curculionoidea)},
author = {Seago, Ainsley E. and Oberprieler, Rolf and Saranathan, Vinod Kumar},
abstractNote = {Abstract A variety of photonic mechanisms give rise to iridescence and other structural colors in insects. In weevils (Coleoptera: Curculionoidea), iridescence is created by the most complex of these mechanisms, the three-dimensional photonic crystal. These self-assembling crystals take the form of triply periodic networks with single diamond or single gyroid symmetries and have been the subject of many descriptive studies based on individual species (often on a single specimen). To determine how these extraordinary nanostructures have evolved, we conduct the first comparative study of photonic crystals and setal nanostructure across Curculionoidea. By integrating structural data with newly available phylogenetic information, we demonstrate that—despite their widespread geographical and taxonomic distribution—three-dimensional photonic crystals appear to have evolved only once in weevils, in the common ancestor of a clade comprising the current subfamilies Entiminae and Cyclominae. Flattened, hollow setae with an unordered, spongy network in the lumen appear to be a necessary precursor to three-dimensional photonic crystals; we propose an evolutionary pathway by which this transformation has occurred.},
doi = {10.1093/icb/icz040},
journal = {Integrative and Comparative Biology},
number = 6,
volume = 59,
place = {United States},
year = {2019},
month = {5}
}

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