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© 1987

Early Development of the Shoulder Girdle and Sternum in Marsupials (Mammalia: Metatheria)

Book

Part of the Advances in Anatomy Embryology and Cell Biology book series (ADVSANAT, volume 109)

Table of contents

  1. Front Matter
    Pages I-VII
  2. Milan Klima
    Pages 3-8
  3. Milan Klima
    Pages 9-53
  4. Milan Klima
    Pages 54-80
  5. Milan Klima
    Pages 81-82
  6. Back Matter
    Pages 83-94

About this book

Introduction

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 connection via the clavicle. The metacoracoid becomes the processus coracoideus scapulae. The procoracoid becomes the praeclavium. The unpaired sternal element fuses with the paired sternal element, generating the uniform manubrium sterni. The first rib takes its usual position in the thorax. In the pouch young, the breast­ shoulder apparatus as a whole already shows all the typical characteristics that can be determined in adults.

Keywords

Mammalia development embryo evolution marsupials morphogenesis reptiles

Authors and affiliations

  1. 1.Anatomisches InstitutJohann Wolfgang Goethe-UniversitätFrankfurt am MainGermany

Bibliographic information

  • Book Title Early Development of the Shoulder Girdle and Sternum in Marsupials (Mammalia: Metatheria)
  • Authors Milan Klima
  • Series Title Advances in Anatomy Embryology and Cell Biology
  • DOI https://doi.org/10.1007/978-3-642-72994-2
  • Copyright Information Springer-Verlag Berlin Heidelberg 1987
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Springer Book Archive
  • Softcover ISBN 978-3-540-18358-7
  • eBook ISBN 978-3-642-72994-2
  • Series ISSN 0301-5556
  • Series E-ISSN 2192-7065
  • Edition Number 1
  • Number of Pages VII, 91
  • Number of Illustrations 21 b/w illustrations, 0 illustrations in colour
  • Topics Cell Biology
    Zoology
  • Buy this book on publisher's site
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