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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Further observation on the early regenerates after fission in the planarian Dugesia japonica

I Hori and Y Kishida (2001)

Further observation on the early regenerates after fission in the planarian Dugesia japonica


In addition to possessing remarkable regeneration powers, many species of planatians reproduce asexually by fission. Since fission takes place at the post-pharyngeal region in most cases, we amputated this body portion of intact animals and compared their regeneration process with that of fission fragments. The fission fragments formed a well-defined blastema in the early regenerates, and the number of blastema-forming cells of the regenerates was larger than that of the amputated ones. When we compared the early regenerates from posterior fragments with those from anterior ones, it was clearly confirmed that posterior fragments invariably regenerated more rapidly. The present observations on the pre-fissioning planarians suggest that the rapid development of the early blastema is induced by fixed parenchyma cells at the preparatory parenchymal region for fissioning.

Platyhelminthes; planarian; fission; regeneration; differentiation
9th International Symposium on the Biology of the Turbellaria (ISBT), BARCELONA, SPAIN, JUN, 2000
  • ISSN: 0777-6276

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium


Annales de la Société malacologique de Belgique
​Annales de la Société royale malacologique et zoologique de Belgique
Annales de la Société Royale Zoologique de Belgique
Belgian Journal of Zoology