Mechanical basis of morphogenesis and convergent evolution of spiny seashells

Handle URI:
http://hdl.handle.net/10754/598785
Title:
Mechanical basis of morphogenesis and convergent evolution of spiny seashells
Authors:
Chirat, R.; Moulton, D. E.; Goriely, A.
Abstract:
Convergent evolution is a phenomenon whereby similar traits evolved independently in not closely related species, and is often interpreted in functional terms. Spines in mollusk seashells are classically interpreted as having repeatedly evolved as a defense in response to shell-crushing predators. Here we consider the morphogenetic process that shapes these structures and underlies their repeated emergence. We develop a mathematical model for spine morphogenesis based on the mechanical interaction between the secreting mantle edge and the calcified shell edge to which the mantle adheres during shell growth. It is demonstrated that a large diversity of spine structures can be accounted for through small variations in control parameters of this natural mechanical process. This physical mechanism suggests that convergent evolution of spines can be understood through a generic morphogenetic process, and provides unique perspectives in understanding the phenotypic evolution of this second largest phylum in the animal kingdom.
Citation:
Chirat R, Moulton DE, Goriely A (2013) Mechanical basis of morphogenesis and convergent evolution of spiny seashells. Proceedings of the National Academy of Sciences 110: 6015–6020. Available: http://dx.doi.org/10.1073/pnas.1220443110.
Publisher:
Proceedings of the National Academy of Sciences
Journal:
Proceedings of the National Academy of Sciences
KAUST Grant Number:
KUK-C1-013-04
Issue Date:
25-Mar-2013
DOI:
10.1073/pnas.1220443110
PubMed ID:
23530223
PubMed Central ID:
PMC3625336
Type:
Article
ISSN:
0027-8424; 1091-6490
Sponsors:
We thank N. L. Larson (Black Hills Museum of Natural History, Hill City, SD) and J. Thomas (Université de Bourgogne, Dijon, France) for providing us with Fig. 1 C and D, respectively, and P. D. Shipman for helpful exchanges. This publication is based on work supported by King Abdullah University of Science and Technology Award KUK-C1-013-04 (to D.E.M. and A.G.), and a European Commission Framework 7 Reintegration Grant (A.G.). A.G. is a Royal Society Wolfson Research Merit Award recipient.
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Full metadata record

DC FieldValue Language
dc.contributor.authorChirat, R.en
dc.contributor.authorMoulton, D. E.en
dc.contributor.authorGoriely, A.en
dc.date.accessioned2016-02-25T13:41:11Zen
dc.date.available2016-02-25T13:41:11Zen
dc.date.issued2013-03-25en
dc.identifier.citationChirat R, Moulton DE, Goriely A (2013) Mechanical basis of morphogenesis and convergent evolution of spiny seashells. Proceedings of the National Academy of Sciences 110: 6015–6020. Available: http://dx.doi.org/10.1073/pnas.1220443110.en
dc.identifier.issn0027-8424en
dc.identifier.issn1091-6490en
dc.identifier.pmid23530223en
dc.identifier.doi10.1073/pnas.1220443110en
dc.identifier.urihttp://hdl.handle.net/10754/598785en
dc.description.abstractConvergent evolution is a phenomenon whereby similar traits evolved independently in not closely related species, and is often interpreted in functional terms. Spines in mollusk seashells are classically interpreted as having repeatedly evolved as a defense in response to shell-crushing predators. Here we consider the morphogenetic process that shapes these structures and underlies their repeated emergence. We develop a mathematical model for spine morphogenesis based on the mechanical interaction between the secreting mantle edge and the calcified shell edge to which the mantle adheres during shell growth. It is demonstrated that a large diversity of spine structures can be accounted for through small variations in control parameters of this natural mechanical process. This physical mechanism suggests that convergent evolution of spines can be understood through a generic morphogenetic process, and provides unique perspectives in understanding the phenotypic evolution of this second largest phylum in the animal kingdom.en
dc.description.sponsorshipWe thank N. L. Larson (Black Hills Museum of Natural History, Hill City, SD) and J. Thomas (Université de Bourgogne, Dijon, France) for providing us with Fig. 1 C and D, respectively, and P. D. Shipman for helpful exchanges. This publication is based on work supported by King Abdullah University of Science and Technology Award KUK-C1-013-04 (to D.E.M. and A.G.), and a European Commission Framework 7 Reintegration Grant (A.G.). A.G. is a Royal Society Wolfson Research Merit Award recipient.en
dc.publisherProceedings of the National Academy of Sciencesen
dc.subject.meshMorphogenesisen
dc.subject.meshBiological Evolutionen
dc.titleMechanical basis of morphogenesis and convergent evolution of spiny seashellsen
dc.typeArticleen
dc.identifier.journalProceedings of the National Academy of Sciencesen
dc.identifier.pmcidPMC3625336en
dc.contributor.institutionCNRS Centre National de la Recherche Scientifique, Paris, Franceen
dc.contributor.institutionUniversity of Oxford, Oxford, United Kingdomen
kaust.grant.numberKUK-C1-013-04en

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