Ommatokoita

Ommatokoita elongata is a 30 mm (1.2 in) long pinkish-white parasitic copepod, frequently found permanently attached to the corneas of the Greenland shark and Pacific sleeper shark.[1][2][3] The parasites cause severe visual impairment, but it is thought that the sharks do not rely on keen eyesight for their survival.[2] It was speculated that the copepod may be bioluminescent and thus form a mutualistic relationship with the shark by attracting prey, but this hypothesis has not been verified.[4] It is the only species in the genus Ommatokoita.[5]

Ommatokoita elongata
Scientific classification
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Ommatokoita

Leigh-Sharpe, 1926
Species:
O. elongata
Binomial name
Ommatokoita elongata
(Grant, 1827)
Synonyms

Ommatokoita superba Leigh-Sharpe, 1926

References

  1. Borucinska, J. D.; Benz, G. W.; Whiteley, H. E. (1998). "Ocular lesions associated with attachment of the parasitic copepod Ommatokoita elongata (Grant) to corneas of Greenland sharks, Somniosus microcephalus (Bloch & Schneider)". Journal of Fish Diseases. 21 (6): 415–22. doi:10.1046/j.1365-2761.1998.00122.x.
  2. Benz, George W.; Borucinska, Joanna D.; Lowry, Lloyd F.; Whiteley, Herbert E. (2002). "Ocular lesions associated with attachment of the copepod Ommatokoita elongata (Lernaeopodidae: Siphonostomatoida) to corneas of Pacific sleeper sharks Somniosus pacificus captured off Alaska in Prince William Sound". The Journal of Parasitology. 88 (3): 474–81. doi:10.1645/0022-3395(2002)088[0474:OLAWAO]2.0.CO;2. PMID 12099414.
  3. Martin, R. Aidan (October 4, 1998). "Greenland sharks and parasites".
  4. Berland, Bjørn (1961). "Copepod Ommatokoita elongata (Grant) in the Eyes of the Greenland Shark—a Possible Cause of Mutual Dependence". Nature. 191 (4790): 829–30. Bibcode:1961Natur.191..829B. doi:10.1038/191829a0.
  5. Geoff Boxshall (2009). T. Chad Walter; Geoff Boxshall (eds.). "Ommatokoita Leigh-Sharpe, 1926". World Copepoda database. World Register of Marine Species. Retrieved March 8, 2010.


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