Persistence of Meckel's cartilage in sub‐adult Struthio camelus and Dromaius novaehollandiae

dc.contributor.authorCrole, Martina Rachel
dc.contributor.authorSoley, John Thomson
dc.contributor.emailmartina.crole@up.ac.zaen_ZA
dc.date.accessioned2020-04-21T12:39:38Z
dc.date.issued2020-04
dc.description.abstractThis study describes the persistence of an embryonal structure through to sub‐adulthood in the ostrich and emu. Mandibles from sub‐adult ostrich and emu were subjected to special staining, light microscopy and dissected to reveal and describe Meckel's cartilage. Meckel's cartilage, composed of hyaline cartilage, was present within the neurovascular canal of both species. The persistence through to sub‐adulthood of Meckel's cartilage in the ostrich and emu is a feature not previously reported in any other avian species. The proximal end of Meckel's cartilage was ossified in the region of the articular bone and the distal end was ossified in some specimens. Although this structure may ossify at a much later stage in life, the function in young and sub‐adult birds may be to dampen shockwaves along the intramandibular nerve that result from the action of pecking. In the ostrich, the M. pseudotemporalis superficialis tendon inserted onto the supra‐angular bone and Meckel's cartilage. In the emu, a small portion of the tendon was attached to the supra‐angular bone and the main part to Meckel's cartilage. The persistence of Meckel's cartilage in adult lepidosaurs, crocodilians and ratites represents an unusual shared trait between the extant members of the above groups.en_ZA
dc.description.departmentAnatomy and Physiologyen_ZA
dc.description.embargo2021-04-01
dc.description.librarianhj2020en_ZA
dc.description.sponsorshipThe University of Pretoria and the National Research Foundation.en_ZA
dc.description.urihttp://wileyonlinelibrary.com/journal/azoen_ZA
dc.identifier.citationCrole MR, Soley JT. Persistence of Meckel’s cartilage in sub‐adult Struthio camelus and Dromaius novaehollandiae. Acta Zoologica 2020;101:197–205. https://doi.org/10.1111/azo.12285.en_ZA
dc.identifier.issn0001-7272 (print)
dc.identifier.issn1463-6395 (online)
dc.identifier.other10.1111/azo.12285
dc.identifier.urihttp://hdl.handle.net/2263/74331
dc.language.isoenen_ZA
dc.publisherWileyen_ZA
dc.rights© 2018 The Royal Swedish Academy of Sciences. This is the pre-peer reviewed version of the following article : Persistence of Meckel’s cartilage in sub‐adult Struthio camelus and Dromaius novaehollandiae. Acta Zoologica 2020;101:197–205. https://doi.org/10.1111/azo.12285. The definite version is available at : http://wileyonlinelibrary.com/journal/azo.en_ZA
dc.subjectEmu (Dromaius novaehollandiae)en_ZA
dc.subjectMandibleen_ZA
dc.subjectMeckel's cartilageen_ZA
dc.subjectRatiteen_ZA
dc.subjectOstrich (Struthio camelus)en_ZA
dc.titlePersistence of Meckel's cartilage in sub‐adult Struthio camelus and Dromaius novaehollandiaeen_ZA
dc.typePostprint Articleen_ZA

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