A distinct patterning mechanism of O and P cell fates in the development of the rostral segments of the leech Helobdella robusta: implications for the evolutionary dissociation of developmental pathway and morphological outcome

@inproceedings{Kuo2004ADP,
  title={A distinct patterning mechanism of O and P cell fates in the development of the rostral segments of the leech Helobdella robusta: implications for the evolutionary dissociation of developmental pathway and morphological outcome},
  author={Dian-Han Kuo and Marty Shankland},
  booktitle={Development},
  year={2004}
}
Despite a high degree of homonomy in the segmental organization of the ectoderm, the body plan of the leech is divided into two zones based on the distinct cell lineage patterns that give rise to the O/P portion of the segmental ectoderm. In the midbody and caudal segments, each segmental repeat of ectoderm arises in part from one o' blast cell and one `p' blast cell. These two blast cells are positionally specified to distinct O and P fates, and give rise to differentiated descendant cells… 
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