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Surprise in a small package: foregut metamorphosis in the marine ectoparasitic snail Odostomia tenuisculpta (Family Pyramidellidae)

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dc.contributor.author Harms, Kathrina
dc.date.accessioned 2019-07-30T17:08:42Z
dc.date.copyright 2019 en_US
dc.date.issued 2019-07-30
dc.identifier.uri http://hdl.handle.net/1828/10996
dc.description.abstract Members of the Pyramidellidae are ectoparasites that have highly unusual feeding habits relative to other heterobranch gastropods. Pyramidellid foregut anatomy is so complex that it is difficult to recognize homologous parts relative to other heterobranch gastropods, which is a necessary step in reconstructing evolutionary changes to the foregut developmental program. We investigated foregut development through metamorphosis and beyond in the pyramidellid Odostomia tenuisculpta. By examining sections of larval and post-velum loss stages, we conclude that the so-named acrembolic proboscis of this pyramidellid is actually an eversible oral tube and the piercing stylet is either a modified radular tooth or a jaw derivative. Much of the complex, multi-component foregut of the post-metamorphic stage is constructed during a 10-day period of explosive metamorphic morphogenesis. This stands in marked contrast to predatory neogastropods, where most components of the adult feeding system become extensively differentiated in the larval stage prior to settlement and metamorphosis. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.subject modularity en_US
dc.subject larva en_US
dc.subject morphogenesis en_US
dc.subject Euthyneura en_US
dc.subject Pyramidellidae en_US
dc.title Surprise in a small package: foregut metamorphosis in the marine ectoparasitic snail Odostomia tenuisculpta (Family Pyramidellidae) en_US
dc.type Thesis en_US
dc.contributor.supervisor Page, Louise Roberta
dc.degree.department Department of Biology en_US
dc.degree.level Master of Science M.Sc. en_US
dc.description.scholarlevel Graduate en_US
dc.description.embargo 2020-06-10


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