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JOURNAL OF PLANKTON RESEARCH | VOLUME 10 | NUMBER 3 | PAGES 475-485 | 1988
© Oxford University Press

research-article

Oncaea praeclara n. sp. (Copepoda: Poecilostomatoida) from deep-sea hydrothermal vents in the eastern Pacific

Arthur G. Humes

Boston University Marine Program, Marine Biological Laboratory Woods Hole, MA 02543, USA

Received on August 3, 1987; accepted on January 19, 1988 A new species of planktonic copepod, Oncaea praeclara, is described from a depth of 2003–2635 m at the East Pacific Rise, the Galapagos Rift, and the Guaymas Basin in the Gulf of California. The species may be recognized by a combination of characters: its relatively large size; the long caudal ramus, which is about two times longer than the anal segment and has a ratio of 4.96–6.7:1; the sexual dimorphism in the armature of the fourth segment of the second antenna; and the labrum with a nearly straight posteroventral margin having four median teeth and lateral setules.


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