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Embryonic origins of hull cells in the flatworm Macrostomum lignano through cell lineage analysis: developmental and phylogenetic implications
Willems, M.; Egger, B.; Wolff, C.; Mouton, S.; Houthoofd, W.; Fonderie, P.; Couvreur, M.; Artois, T.; Borgonie, G. (2009). Embryonic origins of hull cells in the flatworm Macrostomum lignano through cell lineage analysis: developmental and phylogenetic implications. Dev. Genes Evol. 219(8): 409-417. hdl.handle.net/10.1007/s00427-009-0304-x
In: Development, Genes and Evolution. Springer: Berlin; Heidelberg. ISSN 0949-944X; e-ISSN 1432-041X
Peer reviewed article  

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Trefwoorden
    Rhabditophora [WoRMS]
    Marien
Author keywords
    Embryo; 4D microscopy; Cell lineage; Hull cells; Ontogeny; Rhabditophora

Auteurs  Top 
  • Willems, M.
  • Egger, B.
  • Wolff, C.
  • Mouton, S.
  • Houthoofd, W.
  • Fonderie, P.
  • Couvreur, M.
  • Artois, T.
  • Borgonie, G.

Abstract
    The development of macrostomid flatworms is of interest for evolutionary developmental biology research because these taxa combine characteristics of the canonical spiral cleavage pattern with significant deviations from this pattern. One such deviation is the formation of hull cells, which surround the remaining embryonic primordium during early development. Using live observations with a 4D microscope system, histology, and 3D reconstructions, we analyzed the ontogeny of these hull cells in the macrostomid model organism Macrostomum lignano. Our cell lineage analysis allowed us to find the precursors of the hull cells in this species. We discuss the relation between macrostomid development and the development of other spiralians and the question of whether hull cells are homologous within rhabditophoran flatworms.

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