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In small mammals, the middle ear cavity (bulla) was found to be enlarged in the desert\u2010dwelling species; however, differences in bullar size could have been due to ancestry. In this study, we sampled seven species from three genera (\n                    <jats:italic>Myotomys, Otomys<\/jats:italic>\n                    , and\n                    <jats:italic>Parotomys<\/jats:italic>\n                    ) of the African murid tribe Otomyini (laminated\u2010toothed rats), and compared the bullar volumes and shapes between the otomyine species and within the species\n                    <jats:italic>Myotomys unisulcatus<\/jats:italic>\n                    . Photographs of museum skull specimens were taken from ventral and lateral views, and the volumes of the bullae were estimated digitally from the photographs. No sexual dimorphism in bullar volumes was found in any of the species. Corrected bullar volumes were significantly different between species and larger bullae were seen in individuals inhabiting regions with lower annual rainfall. Bullar shape (estimated using geometric morphometrics) was significantly different between the genera and the species.\n                    <jats:italic>Parotomys<\/jats:italic>\n                    have tympanic meatuses that face more anteriorly compared to both,\n                    <jats:italic>Otomys<\/jats:italic>\n                    and\n                    <jats:italic>Myotomys<\/jats:italic>\n                    . When comparing bullae within\n                    <jats:italic>M. unisulcatus<\/jats:italic>\n                    , those inhabiting regions with lower annual rainfall had significantly larger bullar volumes, but no significant difference was found in bullar shape between the regions. This study shows that otomyine rodents in more xeric habitats have different auditory structures to those inhabiting wetter habitats.\n                  <\/jats:p>","DOI":"10.1002\/jmor.21680","type":"journal-article","created":{"date-parts":[[2024,2,8]],"date-time":"2024-02-08T02:44:16Z","timestamp":1707360256000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Morphological variations of auditory bullae in otomyine rodents (Rodentia: Otomyini) in\n                    <b>southern<\/b>\n                    African biomes"],"prefix":"10.1002","volume":"285","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0962-6523","authenticated-orcid":false,"given":"Shelley","family":"Edwards","sequence":"first","affiliation":[{"name":"Department of Zoology and Entomology Rhodes University Makhanda South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rochelle","family":"Bessinger","sequence":"additional","affiliation":[{"name":"Department of Zoology and Entomology Rhodes University Makhanda South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,2,7]]},"reference":[{"key":"e_1_2_8_2_1","unstructured":"Adams D. 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