| Coxa Morphologically Adapted to Large Egg in Aepyornithid Species Compared with Various Palaeognaths. | |
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MedLine Citation:
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PMID: 21812805 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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With 12 figures and 3 tables Summary The coxa of palaeognaths including extinct aepyornithid species was compared by means of osteology, computed tomography (CT) imaging and macroscopic anatomy. The pre-acetabular area of the ilium was proportionally much larger in width and height in aepyornithid species than in other extant palaeognaths. The post-acetabular area of the ilium, ischium and pubis was relatively short and bilaterally extended in aepyornithid species. Although the Aepyornis species might have produced egg with a major axis exceeding 300 mm in major axis, the short post-acetabular coxa and widely opened ischium and pubis would not have been able to stably hold the eggs in the posterior space of the pelvic cavity unlike the situation in the ostrich. As aepyornithid species resembled the kiwi in measurement ratios of length and width in the pre-acetabular area, a functional-morphological model of the coxa in the aepyornithid species can be proposed based on that of the kiwi. From our data, we suggest that the extinct species of Aepyornis and Mullerornis species effectively used the anterior space of the pelvic cavity to support their extraordinary large egg. |
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Authors:
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H Endo; F Akishinonomiya; T Yonezawa; M Hasegawa; F Rakotondraparany; M Sasaki; H Taru; A Yoshida; T Yamasaki; T Itou; H Koie; T Sakai |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-4 |
Journal Detail:
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Title: Anatomia, histologia, embryologia Volume: - ISSN: 1439-0264 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-8-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7704218 Medline TA: Anat Histol Embryol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2011 Blackwell Verlag GmbH. |
Affiliation:
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Addresses of authors: The University Museum, The University of Tokyo, Tokyo, Japan School of Life Sciences, Fudan University, Shanghai, China The Institute of Statistical Mathematics, Tokyo, Japan Department of Animal Zoology, University of Anatananarivo, Anatananarivo, Madagascar Department of Veterinary Anatomy, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan Kanagawa Prefectural Museum of Natural History, Odawara, Japan The Research Institute of Evolutionary Biology, Tokyo, Japan Yamashina Institute of Ornithology, Abiko, Japan Laboratory of Preventive Veterinary Medicine and Animal Health, College of Bioresource Sciences, Nihon University, Fujisawa, Japan Department of Veterinary Physiology, College of Bioresource Sciences, Nihon University, Fujisawa, Japan. |
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