| 书目名称 | Early Development of the Shoulder Girdle and Sternum in Marsupials (Mammalia: Metatheria) | | 编辑 | Milan Klima | | 视频video | | | 丛书名称 | Advances in Anatomy, Embryology and Cell Biology | | 图书封面 |  | | 描述 | The development of the breast-shoulder apparatus in the Marsupialia was inves tigated and compared with the conditions in Monotremata and Placentalia. The results were achieved by the investigation of material comprising altogether 109 histological serial sections of intrauterine embryos, neonates, and pouch young from 11 marsupial species. Additionally, 54 skeletons of subadult and adult marsupials from 25 species were included for comparison. The embryonic states show a strong similarity to the developmental stage of the breast-shoulder apparatus in the monotremes. In contrast, the adult breast-shoulder apparatus generally corresponds to that in placentals. The following elements can be observed in the marsupial breast-shoulder apparatus during embryogenesis: scapula, metacoracoid, procoracoid, first rib, paired sternal elements, unpaired sternal element, and clavicle. All the elements mentioned together form a compact, continuous arch in both the intrauterine embryos and the neonates. In the pouch young, this arch is reduced rather soon after birth, so that a compact connection between the left and the right half of the body no longer exists. All that remains is a loose connect | | 出版日期 | Book 1987 | | 关键词 | Mammalia; development; embryo; evolution; marsupials; morphogenesis; reptiles | | 版次 | 1 | | doi | https://doi.org/10.1007/978-3-642-72994-2 | | isbn_softcover | 978-3-540-18358-7 | | isbn_ebook | 978-3-642-72994-2Series ISSN 0301-5556 Series E-ISSN 2192-7065 | | issn_series | 0301-5556 | | copyright | The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer-Verlag GmbH, DE |
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发表于 2025-3-21 18:25:15
