{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T09:59:51Z","timestamp":1773395991848,"version":"3.50.1"},"reference-count":47,"publisher":"Wiley","issue":"41","license":[{"start":{"date-parts":[[2019,8,28]],"date-time":"2019-08-28T00:00:00Z","timestamp":1566950400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2019,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The acorn weevil (<jats:italic>Curculio<\/jats:italic> Linnaeus, 1758) rostrum (snout) exhibits remarkable flexibility and toughness derived from the microarchitecture of its exoskeleton. Modifications to the composite profile of the rostral cuticle that simultaneously enhance the flexibility and toughness of the distal portion of the snout are characterized. Using classical laminate plate theory, the effect of these modifications on the elastic behavior of the exoskeleton is estimated. It is shown that the tensile behavior of the rostrum across six <jats:italic>Curculio<\/jats:italic> species with high morphological variation correlates with changes in the relative layer thicknesses and orientation angles of layers in the exoskeleton. Accordingly, increased endocuticle thickness is strongly correlated with increased tensile strength. Rostrum stiffness is shown to be inversely correlated with work of fracture; thus allowing a highly curved rostrum to completely straighten without structural damage. Finally, exocuticle rich invaginations of the occipital sutures are identified both as a likely site of crack initiation in tensile failure and as a source of morphological constraint on the evolution of the rostrum in <jats:italic>Curculio<\/jats:italic> weevils. It is concluded that avoidance of catastrophic structural failure, as initiated in these sutures under tension, is the driving selective pressure in the evolution of the female <jats:italic>Curculio<\/jats:italic> rostrum.<\/jats:p>","DOI":"10.1002\/adma.201903526","type":"journal-article","created":{"date-parts":[[2019,8,28]],"date-time":"2019-08-28T03:25:12Z","timestamp":1566962712000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Avoidance of Catastrophic Structural Failure as an Evolutionary Constraint: Biomechanics of the Acorn Weevil Rostrum"],"prefix":"10.1002","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6289-6541","authenticated-orcid":false,"given":"Michael A.","family":"Jansen","sequence":"first","affiliation":[{"name":"School of Life Sciences Arizona State University  Tempe AZ 85287 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jason","family":"Williams","sequence":"additional","affiliation":[{"name":"School for Engineering of Matter Energy, and Transport Arizona State University  Tempe AZ 85287 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nikhilesh","family":"Chawla","sequence":"additional","affiliation":[{"name":"School for Engineering of Matter Energy, and Transport Arizona State University  Tempe AZ 85287 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nico M.","family":"Franz","sequence":"additional","affiliation":[{"name":"School of Life Sciences Arizona State University  Tempe AZ 85287 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2019,8,28]]},"reference":[{"key":"e_1_2_4_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsb.2016.05.007"},{"key":"e_1_2_4_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.asd.2004.05.006"},{"key":"e_1_2_4_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00561216"},{"key":"e_1_2_4_4_1","first-page":"191","volume":"22","author":"van de Kamp T.","year":"2010","journal-title":"Entomol. 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A.Aguirre Uribe Ph.D. Thesis Texas A & M University1978."},{"key":"e_1_2_4_23_1","first-page":"783","volume":"176","author":"Moffett M.","year":"1989","journal-title":"Natl. Geogr. 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