{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T00:39:39Z","timestamp":1789087179433,"version":"build-2803163510"},"reference-count":74,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,1,29]],"date-time":"2023-01-29T00:00:00Z","timestamp":1674950400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["DBI 1429113"],"award-info":[{"award-number":["DBI 1429113"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Kent State University","award":["DBI 1429113"],"award-info":[{"award-number":["DBI 1429113"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biology"],"abstract":"<jats:p>Adult cicadas pierce woody stems with their mouthparts to feed on xylem, suggesting the presence of cuticular adaptations that could increase hardness and elastic modulus. We tested the following hypotheses: (a) the mouthpart cuticle includes inorganic elements, which augment the mechanical properties; (b) these elements are abundant in specific mouthpart structures and regions responsible for piercing wood; (c) there are correlations among elements, which could provide insights into patterns of element colocalization. We used scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) to investigate mouthpart morphology and quantify the elemental composition of the cuticle among four cicada species, including periodical cicadas (Magicicada sp.). Nanoindentation was used to quantify hardness and elastic modulus of the mandibles. We found 12 inorganic elements, including colocalized manganese and zinc in the distal regions of the mandible, the structure most responsible for piercing through wood; nanoindentation determined that these regions were also significantly harder and had higher elastic modulus than other regions. Manganese and zinc abundance relates to increased hardness and stiffness as in the cuticle of other invertebrates; however, this is one of the first reports of cuticular metals among insects with piercing-sucking mouthparts (&gt;100,000 described species). The present investigation provides insight into the feeding mechanism of cicadas, an important but understudied component of their life traits.<\/jats:p>","DOI":"10.3390\/biology12020207","type":"journal-article","created":{"date-parts":[[2023,1,30]],"date-time":"2023-01-30T03:31:11Z","timestamp":1675049471000},"page":"207","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Comparative Material and Mechanical Properties among Cicada Mouthparts: Cuticle Enhanced with Inorganic Elements Facilitates Piercing through Woody Stems for Feeding"],"prefix":"10.3390","volume":"12","author":[{"given":"Kristen E.","family":"Reiter","sequence":"first","affiliation":[{"name":"Department of Biological Sciences, Kent State University at Stark, North Canton, OH 44720, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1991-8183","authenticated-orcid":false,"given":"Cynthia","family":"Perkovich","sequence":"additional","affiliation":[{"name":"Biology and Toxicology Department, Ashland University, Ashland, OH 44805, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katelynne N.","family":"Smith","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Kent State University at Stark, North Canton, OH 44720, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2896-0674","authenticated-orcid":false,"given":"Jiansheng","family":"Feng","sequence":"additional","affiliation":[{"name":"School of Polymer Science and Polymer Engineering, University of Akron, Akron, OH 44325, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gene","family":"Kritsky","sequence":"additional","affiliation":[{"name":"Department of Biology, Mount St. Joseph University, Cincinnati, OH 45233, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1999-196X","authenticated-orcid":false,"given":"Matthew S.","family":"Lehnert","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Kent State University at Stark, North Canton, OH 44720, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,29]]},"reference":[{"key":"ref_1","unstructured":"Grimaldi, D., and Engel, M.S. 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