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Wi, J.H., H.L. Suh, H.S. Yang & H.Y. Soh (2008). Two species of the genus Oncaea (Copepoda, Poecilostomatoida, Oncaeidae) from the East Sea, Korea. Ocean Science Journal. 43(4):183-194.
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Wi, J.H., H.L. Suh, H.S. Yang & H.Y. Soh
2008
Two species of the genus Oncaea (Copepoda, Poecilostomatoida, Oncaeidae) from the East Sea, Korea.
Ocean Science Journal
43(4):183-194.
Publication
The World Of Copepods (T. Chad Walter)
Available for editors  PDF available
Oncaea venusta Philippi, 1843 has been known as having some different size groups, but recent genetic study for cyt b and ITS 1 (Elverset al. 2006) suggests that these size groups can be considered as different species. Of these size groups, the largestO. venusta Philippi and the smallestO. venella Farran, 1929 were first described in Korean waters. The latter is easily distinguishable from the former in the following characteristics in addition to its small size: (1) length to width ratio of genital double somite of two genders smaller, and (2) female second pediger bearing inconspicuous dorso-posterior swelling.Oncaea venusta andO. venella co-occur in Korean waters during spring to fall, but their occurrence patterns seasonally differ: the former shows higher density in fall while the latter does in summer.
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