Paratomy

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Form of asexual reproduction in animals

title: "Paratomy" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["reproduction"] description: "Form of asexual reproduction in animals" topic_path: "general/reproduction" source: "https://en.wikipedia.org/wiki/Paratomy" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Form of asexual reproduction in animals ::

Paratomy is a form of asexual reproduction in animals where the organism splits in a plane perpendicular to the antero-posterior axis and the split is preceded by the "pregeneration" of the anterior structures in the posterior portion. The developing organisms have their body axis aligned, i.e., they develop in a head to tail fashion.

Budding can be considered to be similar to paratomy except that the body axes need not be aligned: the new head may grow toward the side or even point backward (e.g. Convolutriloba retrogemma an acoel flat worm). In animals that undergo fast paratomy a chain of zooids packed in a head to tail formation may develop. Many oligochaete annelids, acoelous turbellarians, and coelenterates reproduce by this method.

External resources

This paper has a detailed description of the changes during paratomy.

References

References

  1. Åkesson, Bertil. (2001-12-01). "Fission in ''Convolutriloba longifissura'': asexual reproduction in acoelous turbellarians revisited". Acta Zoologica.
  2. Egger, Bernhard. (December 2008). "Regeneration: rewarding, but potentially risky". Birth Defects Research Part C: Embryo Today: Reviews.
  3. Herlant-Meewis, Henriette. (1950-10-01). "Cyst-Formation in Aeolosoma Hemprichi (Ehr)". Biological Bulletin.
  4. Jaeckle, William B.. (1994-02-01). "Multiple Modes of Asexual Reproduction by Tropical and Subtropical Sea Star Larvae: An Unusual Adaptation for Genet Dispersal and Survival". Biological Bulletin.
  5. Raikova, Ekaterina V.. (1994-02-01). "Life Cycle, Cytology, and Morphology of Polypodium hydriforme, a Coelenterate Parasite of the Eggs of Acipenseriform Fishes". The Journal of Parasitology.

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reproduction