The embryonic cell lineage of the nematode Halicephalobus gingivalis (Nematoda: Cephalobina: Panagrolaimoidea)
Wouter Houthoofd,Gaetan Borgonie +1 more
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The data presented here show that the polyclonal cell specification is much more widespread in clades 9 and 10 and is not a highly derived trait that is specifically linked to the fast development of the model organism C. elegans.Abstract:
This paper describes the nearly complete embryonic cell lineage of the terrestrial nematode, Halicephalobus gingivalis, up to somatic muscle contraction, resulting in the formation of 536 cells, of which 24 undergo programmed cell death. Halicephalobus gingivalis has a 94% lineage homology with both Caenorhabditis elegans and Pellioditis marina, and a fate homology of only 86% and 78%, respectively. Although H. gingivalis belongs to a different superfamily than C. elegans and P. marina, its cell lineage is remarkably consistent with them. Variations in the fate distribution of cells among the different species were only observed at the end of the cell lineage. The data presented here show that the polyclonal cell specification is much more widespread in clades 9 and 10 and is not a highly derived trait that is specifically linked to the fast development of the model organism C. elegans.read more
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References
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The genetics of caenorhabditis elegans
TL;DR: In this paper, the authors describe methods for the isolation, complementation and mapping of mutants of Caenorhabditis elegans, a small free-living nematode worm.
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The embryonic cell lineage of the nematode Caenorhabditis elegans.
TL;DR: It is concluded that the cell lineage itself, complex as it is, plays an important role in determining cell fate and is demonstrated to demonstrate substantial cell autonomy in at least some sections of embryogenesis.
Journal ArticleDOI
Post-embryonic cell lineages of the nematode, Caenorhabditis elegans
John Sulston,H.R. Horvitz +1 more
TL;DR: These cell lineages range in length from one to eight sequential divisions and lead to significant developmental changes in the neuronal, muscular, hypodermal, and digestive systems and are determined by direct observation of the divisions, migrations, and deaths of individual cells in living nematodes.
Journal ArticleDOI
A molecular evolutionary framework for the phylum Nematoda
Mark Blaxter,Paul De Ley,Paul De Ley,James R. Garey,Leo X. Liu,Patsy Scheldeman,Andy Vierstraete,Jacques R. Vanfleteren,Laura Y. Mackey,M. Dorris,Linda M. Frisse,J. T. Vida,W. Kelley Thomas +12 more
TL;DR: It is suggested that animal parasitism arose independently at least four times, and plant parasitism three times, which indicates that convergent morphological evolution may be extensive and that present higher-level classification of the Nematoda will need revision.