Clamp (zoology)

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Computer model[1] of the clamp of a microcotylid monogenean

Clamps are the main attachment structure of the Polyopisthocotylean monogeneans.[3]
These ectoparasitic worms have a variable number of clamps on their haptor (the posterior attachment organ); each clamp is attached to the host fish, generally to its gill. Clamps include sclerotised elements, called the sclerites, and muscles. The structure of clamps varies according to the groups within the Polyopisthocotylean monogeneans; microcotylids have relatively simple clamps, whereas gastrocotylids have more complex clamps.


  1. ^ Yoon, GH.; Al-Jufaili, S.; Freeman, MA.; Bron, JE.; Paladini, G.; Shinn, AP. (Jun 2013). "Omanicotyle heterospina n. gen. et n. comb. (Monogenea: Microcotylidae) from the gills of Argyrops spinifer (Forsskal) (Teleostei: Sparidae) from the Sea of Oman.". Parasit Vectors. 6 (1): 170. PMC 3683332Freely accessible. PMID 23758894. doi:10.1186/1756-3305-6-170.  open access publication – free to read
  2. ^ Justine JL, Rahmouni C, Gey D, Schoelinck C, Hoberg EP (2013). "The Monogenean which lost its clamps". PLOS ONE. 8 (11): e79155. PMC 3838368Freely accessible. PMID 24278118. doi:10.1371/journal.pone.0079155.  open access publication – free to read
  3. ^ Bychowsky, B. E. (1957) Monogenetic Trematodes. Their systematic and phylogeny. Akad. Nauka. USSR. English translation by the American Institute of Biological Science, Washington. 509 pp.doi:10.5962/bhl.title.7475 open access publication – free to read