Fossil scales illuminate the early evolution of lepidopterans and structural colors

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dc.contributor.author Zhang, Qingqing
dc.contributor.author Mey, Wolfram
dc.contributor.author Ansorge, Jörg
dc.contributor.author Starkey, Timothy A.
dc.contributor.author McDonald, Luke T.
dc.contributor.author McNamara, Maria E.
dc.contributor.author Jarzembowski, Edmund A.
dc.contributor.author Wichard, Wilfried
dc.contributor.author Kelly, Richard
dc.contributor.author Ren, Xiaoyin
dc.contributor.author Chen, Jun
dc.contributor.author Zhang, Haichun
dc.contributor.author Wang, Bo
dc.date.accessioned 2018-05-31T11:56:30Z
dc.date.available 2018-05-31T11:56:30Z
dc.identifier.citation Zhang, Q., Mey, W., Ansorge, J., Starkey, T. A., McDonald, L. T., McNamara, M. E., Jarzembowski, E. A., Wichard, W., Kelly, R., Ren, X., Chen, J., Zhang, H. and Wang, B. (2018) 'Fossil scales illuminate the early evolution of lepidopterans and structural colors', Science Advances, 4(4), e1700988, (8pp). doi: 10.1126/sciadv.1700988 en
dc.identifier.volume 4
dc.identifier.issued 2018
dc.identifier.startpage 1
dc.identifier.endpage 8
dc.identifier.issn 2375-2548
dc.identifier.uri http://hdl.handle.net/10468/6231
dc.identifier.doi 10.1126/sciadv.1700988
dc.description.abstract Lepidopteran scales exhibit remarkably complex ultrastructures, many of which produce structural colors that are the basis for diverse communication strategies. Little is known, however, about the early evolution of lepidopteran scales and their photonic structures. We report scale architectures from Jurassic Lepidoptera from the United Kingdom, Germany, Kazakhstan, and China and from Tarachoptera (a stem group of Amphiesmenoptera) from mid-Cretaceous Burmese amber. The Jurassic lepidopterans exhibit a type 1 bilayer scale vestiture: an upper layer of large fused cover scales and a lower layer of small fused ground scales. This scale arrangement, plus preserved herringbone ornamentation on the cover scale surface, is almost identical to those of some extant Micropterigidae. Critically, the fossil scale ultrastructures have periodicities measuring from 140 to 2000 nm and are therefore capable of scattering visible light, providing the earliest evidence of structural colors in the insect fossil record. Optical modeling confirms that diffraction-related scattering mechanisms dominate the photonic properties of the fossil cover scales, which would have displayed broadband metallic hues as in numerous extant Micropterigidae. The fossil tarachopteran scales exhibit a unique suite of characteristics, including small size, elongate-spatulate shape, ridged ornamentation, and irregular arrangement, providing novel insight into the early evolution of lepidopteran scales. Combined, our results provide the earliest evidence for structural coloration in fossil lepidopterans and support the hypothesis that fused wing scales and the type 1 bilayer covering are groundplan features of the group. Wing scales likely had deep origins in earlier amphiesmenopteran lineages before the appearance of the Lepidoptera. en
dc.description.sponsorship National Natural Science Foundation of China (41572010, 41622201, and 41688103); Chinese Academy of Sciences (XDPB05); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2011224) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Association for the Advancement of Science en
dc.relation.uri http://advances.sciencemag.org/content/4/4/e1700988
dc.rights © 2018, the Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC) en
dc.rights.uri https://creativecommons.org/licenses/by-nc/4.0/
dc.subject Lepidopteran scales en
dc.subject Amphiesmenoptera en
dc.subject Micropterigidae en
dc.subject Jurassic en
dc.subject Fossil en
dc.subject Fossil tarachopteran scales en
dc.subject Optical modeling en
dc.title Fossil scales illuminate the early evolution of lepidopterans and structural colors en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Luke McDonald, Biological Earth & Environmental Sciences, University College Cork, Cork, Ireland. +353-21-490-3000 Email: luke.mcdonald@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder National Natural Science Foundation of China
dc.contributor.funder Chinese Academy of Sciences
dc.contributor.funder Natural History Museum
dc.contributor.funder European Research Council
dc.contributor.funder Youth Innovation Promotion Association of the Chinese Academy of Sciences
dc.description.status Peer reviewed en
dc.identifier.journaltitle Science Advances en
dc.internal.IRISemailaddress luke.mcdonald@ucc.ie en
dc.internal.IRISemailaddress maria.mcnamara@ucc.ie en
dc.identifier.articleid e1700988
dc.relation.project info:eu-repo/grantAgreement/EC/H2020::ERC::ERC-STG/637691/EU/Animal coloration through deep time: evolutionary novelty, homology and taphonomy/ANICOLEVO


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© 2018, the Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC) Except where otherwise noted, this item's license is described as © 2018, the Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC)
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