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A NEW SPECIES OF PONTELLA (COPEPODA: CALANOIDA) FROM THE INLAND SEA OF JAPAN WITH NOTES ON ITS FEEDING HABITS AND RELATED SPECIES

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image of Journal of Crustacean Biology

ABSTRACT A new species of calanoid copepod Pontella rostraticauda (family Pontellidae) is described based on specimens collected in surface waters of the Inland Sea of Japan. Due to its neustonic character, this species may have been overlooked by previous investigators. The gut content analysis revealed that this species feeds on a wide variety of foods, including both zooplankters and phytoplankters, and can be classified as an omnivorous copepod. The new species is closely allied to P. surrecta Wilson and P. alata Scott and is distinguished from them by the shape of the female urosome and the fifth legs of both sexes. Several derived characters shared by the three species and their geographical distributions provide the basis for proposing the Pontella alata species group as a unique radiation within the genus. Species of this lineage tend to occur in coastal waters around those oceanic islands comprising the western rim of the tropical Pacific. The group occurs north to southern Japan and south to the Great Barrier Reef.

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/content/journals/10.2307/1548304
1987-01-01
2016-12-07

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