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dc.contributor.advisorMahadevan, Lakshminarayanan
dc.contributor.advisorBiewener, Andrew
dc.contributor.advisorCombes, Stacey
dc.contributor.advisorHolbrook, Noel Michele
dc.contributor.authorSalcedo, Mary Kathleen
dc.date.accessioned2019-12-12T09:13:40Z
dc.date.created2019-05
dc.date.issued2019-05-14
dc.date.submitted2019
dc.identifier.citationSalcedo, Mary Kathleen. 2019. An Insect Wing: Expansion, Hemodynamics, and Venation Patterns. Doctoral dissertation, Harvard University, Graduate School of Arts & Sciences.
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:42029752*
dc.description.abstractAlmost one million species of insects have been described to date, with most being winged and capable of flight. Wing venation patterns are highly diverse, with some wings partitioned into just a few “domains” (vein-bounded regions) and others into many thousands. Insect wings are also dynamic living structures composed of stiff tubular veins, which supply hemolymph to veins containing trachea and nerves. There are several key phases in the life of an insect wing: development, emergence and expansion, maturation and maintenance during adulthood. Emergence and wing expansion require seamless transitions between hormonal, neuronal and mechanical cues. A bottleneck to sexual maturity, an expanding wing must be accurately elongated and stiffened. Once the wing is primed, scleratized and ready for flight, maintenance begins. Sensory hairs, mechanosenosors, and more require a continuous supply of hemolymph. Wing flexibility is achieved through hydration of resilin, a highly elastic protein found throughout the wing. In this thesis, I use experimental and computational approaches to explore an insect wing from emergence, through adult hemodynamics and comparative venation geometries. Chapters 1 and 2 focus on the Schistocerca americana, the North American Grasshopper. In Chapter 1, I explore wing unfolding during emergence and expansion, specifically during autoexpansion, a phenomena in which a wing can unfold even when separated from its host insect. In Chapter 2, I quantify hemolymph flow dy- namics within the adult wing and its relationship to accessory pulsatile organs such as wing hearts. In Chapter 3, I utilize quantitative approaches to explore the diversity of venation patterns seen across insect wings, amassing an unprecedented dataset of wing venation geometries to tackle the challenge of comparing geometries and topologies across insect orders. Taken together, this work highlights the diversity and multifunctionality of wings, reflected on their development, function and form, all of which play a role in the phylogenetic and functional diversity of insect wings.
dc.description.sponsorshipBiology, Organismic and Evolutionary
dc.format.mimetypeapplication/pdf
dc.language.isoen
dash.licenseLAA
dc.subjectinsects
dc.subjectinsect wings
dc.subjectwings
dc.subjectSchistocerca americana
dc.subjecthemolymph
dc.subjectcirculation
dc.subjectwing expansion
dc.subjectfunctional morphology
dc.subjectwing patterns
dc.titleAn Insect Wing: Expansion, Hemodynamics, and Venation Patterns
dc.typeThesis or Dissertation
dash.depositing.authorSalcedo, Mary Kathleen
dc.date.available2019-12-12T09:13:40Z
thesis.degree.date2019
thesis.degree.grantorGraduate School of Arts & Sciences
thesis.degree.grantorGraduate School of Arts & Sciences
thesis.degree.levelDoctoral
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy
thesis.degree.nameDoctor of Philosophy
dc.type.materialtext
thesis.degree.departmentBiology, Organismic and Evolutionary
thesis.degree.departmentBiology, Organismic and Evolutionary
dash.identifier.vireo
dash.author.emailmaryksalcedo@gmail.com


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