Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/118377
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dc.contributor.authorSherratt, E.en
dc.contributor.authorCoutts, F.en
dc.contributor.authorRasmussen, A.en
dc.contributor.authorSanders, K.en
dc.date.issued2019en
dc.identifier.citationEvolution and Development, 2019; 21(3):135-144en
dc.identifier.issn1525-142Xen
dc.identifier.issn1525-142Xen
dc.identifier.urihttp://hdl.handle.net/2440/118377-
dc.description.abstractSnakes exhibit a diverse array of body shapes despite their characteristically simplified morphology. The most extreme are seen in within the radiation of fully aquatic sea snakes (Hydrophiinae), where ‘microcephalic’ sea snakes have tiny heads and dramatically reduced forebody girths that can be less than a third of their hindbody. This morphology has convergently evolved in species that specialise on hunting eels in burrows, but its developmental basis has not previously been examined. Here, we infer the developmental patterns underlying extreme body shape changes in sea snakes by testing evolutionary patterns of vertebral number and postnatal ontogenetic growth. Our results show that microcephalic species develop their characteristic shape via changes in both the embryo and postnatal stages: ontogenetic changes cause the hindbodies to reach greater sizes relative to their forebodies in adulthood, suggesting heterochronic shifts in evolution; they also have greater numbers of vertebrae, especially in their forebodies, which contributes to the elongation of the forebody and may compensate for its reduced overall growth. Our findings highlight sea snakes as an excellent system for studying the regulation of segment number and identity in the snake pre-cloacal axial skeleton, and the roles of these developmental traits in snake body shape diversification.en
dc.description.statementofresponsibilityEmma Sherratt, Felicity J. Coutts, Arne R. Rasmussen, Kate L. Sandersen
dc.language.isoenen
dc.publisherWileyen
dc.rights© 2019 Wiley Periodicals, Inc.en
dc.subjectAxial regionalization; axial skeleton; morphological evolution; ontogenetic allometry; vertebraeen
dc.titleVertebral evolution and ontogenetic allometry: the developmental basis of extreme body shape divergence in microcephalic sea snakesen
dc.typeJournal articleen
dc.identifier.rmid0030108810en
dc.identifier.doi10.1111/ede.12284en
dc.relation.granthttp://purl.org/au-research/grants/arc/FT130101965en
dc.identifier.pubid432499-
pubs.library.collectionZoology publicationsen
pubs.library.teamDS10en
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
dc.identifier.orcidSherratt, E. [0000-0003-2164-7877]en
dc.identifier.orcidSanders, K. [0000-0002-9581-268X]en
Appears in Collections:Zoology publications

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