Show simple item record Donoghue, Philip C. J. Bengtson, Stefan Dong, Xi-ping Gostling, Neil J. Huldtgren, Therese Cunningham, John A. Yin, Chongyu Yue, Zhao Peng, Fan Stampanoni, Marco 2012-10-30T15:46:55Z 2012-10-30T15:46:55Z 2006-08-10
dc.identifier doi:10.5061/dryad.fn78r
dc.identifier.citation Donoghue PCJ, Bengtson S, Dong X, Gostling NJ, Huldtgren T, Cunningham JA, Yin C, Yue Z, Peng F, Stampanoni M (2006) Synchrotron X-ray tomographic microscopy of fossil embryos. Nature 442: 680-683.
dc.description Fossilized embryos from the late Neoproterozoic and earliest Phanerozoic have caused much excitement because they preserve the earliest stages of embryology of animals that represent the initial diversification of metazoans. However, the potential of this material has not been fully realized because of reliance on traditional, non-destructive methods that allow analysis of exposed surfaces only, and destructive methods that preserve only a single two-dimensional view of the interior of the specimen. Here, we have applied synchrotron-radiation X-ray tomographic microscopy (SRXTM), obtaining complete three-dimensional recordings at submicrometre resolution. The embryos are preserved by early diagenetic impregnation and encrustation with calcium phosphate, and differences in X-ray attenuation provide information about the distribution of these two diagenetic phases. Three-dimensional visualization of blastomere arrangement and diagenetic cement in cleavage embryos resolves outstanding questions about their nature, including the identity of the columnar blastomeres. The anterior and posterior anatomy of embryos of the bilaterian worm-like Markuelia confirms its position as a scalidophoran, providing new insights into body-plan assembly among constituent phyla. The structure of the developing germ band in another bilaterian, Pseudooides, indicates a unique mode of germ-band development. SRXTM provides a method of non-invasive analysis that rivals the resolution achieved even by destructive methods, probing the very limits of fossilization and providing insight into embryology during the emergence of metazoan phyla.
dc.relation.ispartofseries 442;;2006
dc.relation.haspart doi:10.5061/dryad.fn78r/1
dc.relation.isreferencedby doi:10.1038/nature04890
dc.relation.isreferencedby PMID:16900198
dc.title Data from: Synchrotron X-ray tomographic microscopy of fossil embryos
dc.type Article *
dwc.ScientificName Markuelia
dwc.ScientificName Scalidophora
dwc.ScientificName Priapulida
dwc.ScientificName Introverta
dwc.ScientificName Vinctiplicata
dwc.ScientificName Ecdysozoa
dwc.ScientificName Markuelia
dwc.ScientificName Palaeoscolecida
dc.contributor.correspondingAuthor Donoghue, Philip C. J.
prism.publicationName Nature

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