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Bone vascularization and growth in placoderms (Vertebrata): The example of the premedian plate of Romundina stellina Ørvig, 1975
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organism Biology, Evolution and Developmental Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organism Biology, Evolution and Developmental Biology.
Muséum National D'Histoire Naturelle, Paris, France. (Département Histoire de la Terre)
European Synchrotron Radiation Facility, Grenoble, France.
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2010 (English)In: Comptes rendus. Palevol, ISSN 1631-0683, E-ISSN 1777-571X, Vol. 9, no 6-7, 369-375 p.Article in journal (Refereed) Published
Abstract [en]

The Placodermi (armored jawed fishes), which appeared during the Lower Silurian and disappeared without leading any descendants at the end of the Famennian (Latest Devonian), have the highest diversity of known Devonian vertebrate groups. As phylogenetically basal gnathostomes (jawed vertebrates), they are potentially informative about primitive jawed vertebrate anatomy and origins. Until recently, the study of their internal or histological structures has required destructive methods such as sectioning or serial grinding. Recent advances in tomography and imaging technologies, especially through the increasing use of synchrotron phase contrast imaging for the study of fossils, allow us to reveal the inner structures of the fossil nondestructively and with unprecedented three-dimensional level of detail. Here, we present for the first time the prerostral anatomy of the small acanthothoracid Romundina stellina, one of the earliest and most basal placoderms. Phase contrast imaging allows us to reconstruct the vascularization and nerve canals of the premedian plate and adjacent parts of the skeleton three-dimensionally in great detail, providing important clues to the growth modes and biology of the animal.

Place, publisher, year, edition, pages
2010. Vol. 9, no 6-7, 369-375 p.
Keyword [en]
Bone growth; Microanatomy, Phase contrast X-ray synchrotron Microtomography, Placodermi, Vascularization
National Category
Cell and Molecular Biology
Identifiers
URN: urn:nbn:se:uu:diva-141825DOI: 10.1016/j.crpv.2010.07.005ISI: 000285401400013OAI: oai:DiVA.org:uu-141825DiVA: diva2:386272
Available from: 2011-01-12 Created: 2011-01-12 Last updated: 2017-12-11Bibliographically approved

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