{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T16:24:48Z","timestamp":1777998288889,"version":"3.51.4"},"reference-count":43,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2015,2,6]],"date-time":"2015-02-06T00:00:00Z","timestamp":1423180800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100003413","name":"Bundesministerium f\u00fcr Wissenschaft, Forschung und Wirtschaft","doi-asserted-by":"publisher","award":["ICM-2011-03590"],"award-info":[{"award-number":["ICM-2011-03590"]}],"id":[{"id":"10.13039\/501100003413","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Faculty of Life Sciences, Universit\u00c3\u00a4t Wien","award":["PhD Completion Grant"],"award-info":[{"award-number":["PhD Completion Grant"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Anatomy"],"published-print":{"date-parts":[[2015,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The baculum (os penis) has been extensively studied as a taxon\u2010specific character in bats and other mammals but its mechanical function is still unclear. There is a wide consensus in the literature that the baculum is probably a sexually selected character. Using a novel approach combining postmortem manipulation and three\u2010dimensional (3D) imaging, we tested two functional hypotheses in the common noctule bat <jats:italic>Nyctalus noctula<\/jats:italic>, the common pipistrelle <jats:italic>Pipistrellus pipistrellus,<\/jats:italic> and Nathusius\u2019 pipistrelle <jats:italic>Pipistrellus nathusii<\/jats:italic>: (i) whether the baculum can protect the distal urethra and urethral opening from compression during erection and copulation; and (ii) whether the baculum and corpora cavernosa form a functional unit to support both the penile shaft and the more distal glans tip. In freshly dead or frozen and thawed bats, we compared flaccid penises with artificially \u2018erect\u2019 penises that were inflated with 10% formalin. Penises were stained with alcoholic iodine and imaged with a lab\u2010based high\u2010resolution x\u2010ray microtomography system. Analysis of the 3D images enabled us to compare the changes in relative positions of the baculum, corpora cavernosa, urethra, and corpus spongiosum with one another between flaccid and \u2018erect\u2019 penises. Our results support both functional hypotheses, indicating that the baculum probably performs two different roles during erection. Our approach should prove valuable for comparing and testing the functions of different baculum morphologies in bats and other mammals. Moreover, we have validated an essential component of the groundwork necessary to extend this approach with finite element analysis for quantitative 3D biomechanical modeling of penis function.<\/jats:p>","DOI":"10.1111\/joa.12274","type":"journal-article","created":{"date-parts":[[2015,2,6]],"date-time":"2015-02-06T05:55:08Z","timestamp":1423202108000},"page":"229-235","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Testing hypotheses of bat baculum function with 3D models derived from microCT"],"prefix":"10.1111","volume":"226","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5176-7154","authenticated-orcid":false,"given":"Anna Nele","family":"Herdina","sequence":"first","affiliation":[{"name":"Department of Theoretical Biology University of Vienna Vienna Austria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Diane A.","family":"Kelly","sequence":"additional","affiliation":[{"name":"Neuroscience and Behavior Program University of Massachusetts Amherst MA USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Helena","family":"Jahelkov\u00e1","sequence":"additional","affiliation":[{"name":"Department of Zoology Charles University Prague Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter H. 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