The second polar lobe of theSabellaria cementarium embryo plays an inhibitory role in apical tuft formation

  • Jo Ann Render
  • Published 1983 in Wilhelm Roux's archives of developmental biology


The embryo ofSabellaria cementarium (Polychaeta) forms a polar lobe at each of the first two cleavage divisions which becomes absorbed into one of the blastomeres at the end of the division. Lobe removal experiments show that the polar lobe preceding first cleavage is necessary for the development of the apical tuft and the posttrochal region of the… (More)
DOI: 10.1007/BF00848680


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